A damper hinge for adjusting the closing speed of a furniture cabinet door

Abstract

The utility model relates to the technical field of damping hinge, specifically relates to a kind of adjustable furniture cabinet door body closing speed's damping hinge, limit block with symmetrical limit bar is fixedly connected to inner thread cylinder end, the other end is connected with threaded rod, and inner hexagonal block is equipped in threaded rod end part, when inner thread cylinder is inserted and mounted in hinge assembly, limit block is embedded in the limiting hole of rotating clamp block, limit bar is synchronously clamped into the limiting slot of the limiting hole two sides, and rigid anti-rotation structure is formed, the linear displacement of threaded rod is driven by rotating inner hexagonal block, because of the locking of limit block, inner thread cylinder remains stationary, and adjustment force is accurately converted into threaded rod axial movement, so as to change the pressure between rotating clamp block and rotating block to control frictional damping, and rotation function is independently supported by rotating clamp block and rotating block, and is physically isolated from adjustment chain, to achieve: eliminating the damage of rotary friction to screw pair;Hard engagement structure blocks vibration loosening path;While realizing stepless adjustment of cabinet door closing speed, the reliability and service life are significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of damping hinge technology, and in particular to a damping hinge that can adjust the closing speed of a furniture cabinet door. Background Technology

[0002] The core function of traditional furniture cabinet door hinges is simply to provide physical rotational support for the door; their structure is essentially a simple metal pivot coupled with a swivel arm. When the cabinet door opens and closes, the door impacts the cabinet at a relatively high speed due to its own weight and inertia, especially producing noticeable impact noise and vibration at the moment of closure. This phenomenon stems from the complete lack of a motion buffer mechanism within the hinge mechanism—it cannot absorb or attenuate the kinetic energy at the end of the door's closure, nor can it adjust the closing speed according to usage needs. This directly leads to three typical problems: repeated impacts cause premature damage to the cabinet door's edge banding; significant noise interference when opening and closing the cabinet door at night; and if a child accidentally places their fingers between the door and cabinet, the rapidly closing door poses a risk of pinching them.

[0003] To overcome the aforementioned shortcomings, the industry has developed buffer hinges integrating friction damping or gas-liquid damping elements. These improved products activate the damping mechanism when the door closing angle exceeds a critical point (typically the final 15-30 degrees) by adding friction pairs or sealed damping cavities to the rotating joint. There are two main technical approaches to this: one uses a special damping grease to fill the gaps between rotating parts, utilizing the shear resistance of the viscous fluid to dissipate kinetic energy; the other incorporates an adjustable clamping device at the hinge pivot, generating controllable sliding friction on the metal friction plates on both sides. These structures significantly reduce the closing speed at the end of the door's movement, allowing for a gentler closing, eliminating impact noise, and providing sufficient buffer time to prevent hand pinching accidents.

[0004] However, existing friction-type damping adjustment structures have inherent design flaws. Their core adjustment components typically rely on exposed hexagonal bolts directly pressing against the friction plate, or on coaxial nested bolt-nut pairs for preload control. This adjustment method leads to two typical potential failures: First, the nut or pressing bolt lacks a reliable circumferential locking mechanism, making it prone to spontaneous rotational loosening under the vibrations generated by the frequent opening and closing of the cabinet door, causing the preset damping force to rapidly decay and fail. Second, and more critically, the adjusting bolt often also serves as the hinge rotation pivot, meaning all rotational friction torque must be transmitted through the mating surface between the bolt's outer surface and the friction plate's inner hole—this "dual-purpose" design forces rotational friction and adjustment friction to occur in the same contact area. This not only causes abnormal wear on the bolt thread but also alters the thread fit due to the accumulation of heat from continuous rotational friction, ultimately resulting in loss of adjustment accuracy and rapid degradation of damping function. These structural contradictions urgently require an innovative solution that can physically separate the rotational load-bearing interface from the damping adjustment interface. Utility Model Content

[0005] The purpose of this utility model is to provide a damping hinge that can adjust the closing speed of furniture cabinet doors, thereby solving the technical defects of existing friction damping hinges caused by abnormal thread wear, easy loosening of nuts, and inaccurate damping adjustment function due to the coaxial design of the adjustment mechanism and the rotation pivot.

[0006] To achieve the above objectives, this utility model provides a damping hinge with adjustable closing speed for furniture cabinet doors, including an internal threaded cylinder. A limit block is fixedly installed at one end of the internal threaded cylinder, and limit strips are symmetrically installed on both radial sides of the limit block. A threaded rod is threadedly installed at the end of the internal threaded cylinder opposite to the limit block, and an internal hexagon block is fixedly installed at the end of the threaded rod away from the internal threaded cylinder. The internal threaded cylinder is inserted into the hinge assembly.

[0007] The hinge assembly includes a first slot and a second slot, in which an internally threaded cylinder is inserted and installed. The first slot is located on the inner side of the rotating clamp.

[0008] One of the rotating clamping blocks has a limiting hole on its outer side, and limiting grooves are symmetrically provided on the inner walls on both sides of the limiting hole. The other rotating clamping block has a connecting hole on its outer side.

[0009] When the threaded rod and the internal threaded cylinder are connected by threads, the limiting block is embedded in the limiting hole, the limiting strip is embedded in the limiting groove, and the internal hexagonal block is embedded in the connecting hole.

[0010] The rotating clamps are fixedly installed on the first assembly plate, and the first assembly plate is symmetrically provided with first assembly holes, which are fixed to the cabinet by bolts.

[0011] The second slot is located in the middle of the rotating block. When the threaded rod and the internal threaded cylinder are connected by threads, the rotating block is embedded between the rotating clamping blocks. A second assembly plate is fixedly installed on one side of the rotating block.

[0012] The second assembly plate has symmetrically opened second assembly holes, and bolts pass through the second assembly holes to fix it to the cabinet door.

[0013] This invention relates to a damping hinge for adjusting the closing speed of a furniture cabinet door. The hinge body has a built-in internal threaded cylinder, one end of which is firmly connected to a limiting block with radially symmetrical limiting strips. The other end forms a precise helical engagement with a threaded rod, the end of which integrates an internal hexagonal operating end. When the internal threaded cylinder is inserted into the hinge pivot area, the limiting block precisely embeds into the limiting hole on the outside of the rotating clamp, and its limiting strip simultaneously engages with the limiting grooves on both sides of the limiting hole, forming a bidirectional rotational constraint mechanism. This key design strictly restricts the axial freedom of the internal threaded cylinder and completely isolates rotational displacement, while the threaded rod can be controlled to screw into the internal threaded cylinder to change its extension length. When the internal hexagonal operating end is operated, the rotational force directly drives the threaded rod to perform linear forward and backward motion—due to the interaction between the limiting block and the limiting grooves… The locking effect keeps the internally threaded cylinder stationary, allowing the adjusting force to be fully converted into precise axial displacement of the threaded rod. This displacement, through the internal hexagonal operating end, drives the rotating clamp, dynamically adjusting the contact pressure between the clamp and the rotating block. This achieves linear, stepless control of the frictional torque without altering the hinge's basic rotating pivot structure, ultimately achieving three technical benefits: First, it decouples the rotational bearing and adjusting functions, with the rotational frictional torque independently borne by the clamp and the rotating block, avoiding the risk of thread wear. Second, the rigid engagement of the limit block and the limit groove forms a vibration-resistant self-locking structure, reducing the risk of the adjusting mechanism loosening. Third, it achieves precise closed-loop control of the damping force through a separate adjusting chain, significantly extending service life and ensuring consistent gate speed adjustment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the rotating clamping block in an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the rotating block in an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the internal threaded cylinder according to an embodiment of the present invention.

[0019] In the diagram: 101, internal threaded cylinder; 102, limiting block; 103, limiting strip; 104, threaded rod; 105, internal hexagonal block; 106, hinge assembly; 107, first slot; 108, second slot; 109, rotating clamping block; 110, limiting hole; 111, connecting hole; 112, limiting groove; 113, first assembly plate; 114, first assembly hole; 115, rotating block; 116, second assembly plate; 117, second assembly hole. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0021] Please see Figures 1-4 .

[0022] This utility model provides a damping hinge for adjusting the closing speed of a furniture cabinet door, comprising an internally threaded cylinder 101, one end of which is fixedly connected to a limiting block 102 in a non-rotatable manner. The limiting block 102 has symmetrically distributed limiting strips 103 extending radially from both sides to construct an anti-torsional structure. The other end of the internally threaded cylinder 101 is screwed to a threaded rod 104 via a precision threaded connection. The end of the threaded rod 104 away from the internally threaded cylinder 101 is fixedly connected to an internal hexagonal block 105 for tool operation. The entire internally threaded cylinder 101 unit is inserted into the installation space provided by a hinge assembly 106, which consists of two sets of key insertion structures: a first slot 107 formed inside two rotating clamping blocks 109. The second slot 108, located at the center of the rotating block 115, allows the internal threaded cylinder 101 to pass through both slots for axial positioning. One rotating clamping block 109 has a limiting hole 110 on its outer side, and symmetrical limiting grooves 112 machined on its inner walls for geometric locking. The other rotating clamping block 109 has a through-hole 111 on its outer side for torque transmission. In the assembled state, when the threaded rod 104 and the internal threaded cylinder 101 are fully screwed together, the limiting block 102 will tightly embed into the limiting hole 110 of the rotating clamping block 109, while the limiting strip 103 on the limiting block 102 precisely engages with the limiting groove 112, forming a bidirectional rotational constraint—this design ensures the rotation of the internal hexagonal block 101. At time 5, only the threaded rod 104 is driven to move axially without causing the internal threaded cylinder 101 to rotate; the internal hexagon block 105 is simultaneously embedded in the connecting hole 111 of another rotating clamping block 109, providing both an operating interface and enhancing lateral stability. The two rotating clamping blocks 109 are each fixedly mounted on a rectangular first assembly plate 113, on which first assembly holes 114 are symmetrically arranged. Bolts pass through these holes to achieve a rigid connection between the hinge and the furniture cabinet. The rotating block 115 serves as the core of the pivot movement, and its structure also supports the second slot 108 for accommodating the internal threaded cylinder 101. In the assembled state, the rotating block 115 is embedded between the two rotating clamping blocks 109 to form a rotating pair, and its lateral vertical fixation is... The second assembly plate 116 is fixed, and it also has symmetrically distributed second assembly holes 117. After being connected to the cabinet door by bolts, the threaded rod 104 will push the internal hexagon block 105 to move within the connecting hole 111 by changing the pressure state of the rotating clamp 109 on the rotating block 115. All structures work together to achieve the following function: when the cabinet door is closed, the rotating block 115 drives the second assembly plate 116 to rotate under the constraint of the rotating clamp 109, while the meshing forced damping mechanism of the limiting block 102 and the limiting hole 110 does not rotate. Only the linear displacement of the threaded rod 104 outputs an adjustable damping force to act on the rotating interface, ultimately realizing stepless adjustment of the cabinet door closing speed.

[0023] Working principle: When the cabinet door is opened or closed, the cabinet door rotates relative to the cabinet body, which drives the second assembly plate 116 fixed on the cabinet door and the rotating block 115 on it to rotate synchronously. The rotating block 115 is embedded between two rotating clamping blocks 109 fixed to the cabinet body by bolts. Its rotation drives the pivot part of the entire hinge to operate.

[0024] The core adjustment function of the damping force is achieved by the precision threaded pair formed by the threaded rod 104 and the internal threaded cylinder 101. The internal hexagon block 105 serves as the adjustment input end. The user can rotate the internal hexagon block 105 with a tool (such as an internal hexagon wrench) to drive the threaded rod 104 to make helical motion within the internal threaded cylinder 101, precisely changing the engagement depth or contact length between the two. This change in length directly affects the coefficient of friction between the rotating clamp 109 and the rotating block 115, thereby dynamically controlling the magnitude of the damping force generated. The greater the damping force, the more it hinders the rotating block 115 from moving within the rotating clamp. The stronger the resistance torque of the rotation between 109, the slower the cabinet door closing speed; conversely, the smaller the damping force, the smaller the resistance torque, and the faster the cabinet door closing speed, achieving stepless speed adjustment. To ensure the stability of the adjustment process and the precise transmission of action, a special limiting system is designed. The limiting block 102 fixed at the end of the internal threaded cylinder 101 and its symmetrical limiting strips 103 are precisely embedded in the limiting hole 110 and the limiting grooves 112 on both sides of the outer side of the rotating clamp 109. This fit firmly prevents the internal threaded cylinder 101 from being in its mounting hole (made by the first slot 107 and Any rotational displacement within the second slot 108 ensures that the hexagonal block 105 can only work in the axially constrained position, guaranteeing that the rotational driving force of the hexagonal block 105 is completely converted into the linear extension and retraction motion of the threaded rod 104 rather than slippage. Furthermore, the tight fit between the limiting block 102 and the limiting hole 110, and between the limiting strip 103 and the limiting groove 112, effectively enhances the torsional stiffness and installation stability of the entire damping module within the hinge. Simultaneously, when in the adjustment state, the hexagonal block 105 is embedded in the connecting hole 111 on another rotating clamp 109, enhancing its resistance to lateral forces and stability during operation. Qualitatively, the core of the entire collaborative working process lies in: the user adjusts the screw-in depth of the threaded rod 104 by operating the hexagonal block 105 → this change in depth rotates the friction coefficient between the clamping block 109 and the rotating block 115 → the changed damping force acts on the relative rotation interface of the rotating block 115 and the rotating clamping block 109 when the cabinet door is closed → ultimately achieving precise and smooth control of the closing speed of the cabinet door hinge side. This integrated design cleverly integrates the damping adjustment mechanism with the basic hinge pivot, resulting in a compact structure, convenient operation, and significantly improved stability, quietness, and durability of the cabinet door operation.

[0025] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that implementing all or part of the above embodiments and making equivalent changes in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A damper hinge for adjustable furniture cabinet door body closing speed, comprising an internally threaded cylinder (101), characterized in that: A limiting block (102) is fixedly installed at one end of the internal threaded cylinder (101). Limiting strips (103) are symmetrically installed on both radial sides of the limiting block (102). A threaded rod (104) is threadedly installed at the end of the internal threaded cylinder (101) opposite to the limiting block (102). An internal hexagon block (105) is fixedly installed at the end of the threaded rod (104) away from the internal threaded cylinder (101). The internal threaded cylinder (101) is inserted into the hinge assembly (106).

2. A damper hinge for adjustable furniture cabinet door closure speed according to claim 1, characterized in that: The hinge assembly (106) includes a first slot (107) and a second slot (108), in which an internally threaded cylinder (101) is inserted and installed. The first slot (107) is respectively opened on the inner side of the rotating clamp (109).

3. A damper hinge for adjustable furniture cabinet door closure speed according to claim 2, characterized in that: One of the rotating clamping blocks (109) has a limiting hole (110) on its outer side, and limiting grooves (112) are symmetrically provided on the inner walls of both sides of the limiting hole (110). The other rotating clamping block (109) has a connecting hole (111) on its outer side.

4. A damper hinge for adjustable furniture cabinet door closure speed according to claim 3, characterized in that: When the threaded rod (104) and the internal threaded cylinder (101) are connected by threads, the limiting block (102) is embedded in the limiting hole (110), the limiting strip (103) is embedded in the limiting groove (112), and the internal hexagonal block (105) is embedded in the connecting hole (111).

5. A damper hinge for adjustable furniture cabinet door closure speed according to claim 4, characterized in that: The rotating clamps (109) are respectively fixedly installed on the first assembly plate (113). The first assembly plate (113) is symmetrically provided with first assembly holes (114), and the first assembly holes (114) are fixed to the cabinet by bolts.

6. A damper hinge for adjustable furniture cabinet door closure speed according to claim 5, characterized in that: The second slot (108) is located in the middle of the rotating block (115). When the threaded rod (104) and the internal threaded cylinder (101) are connected by threads, the rotating block (115) is embedded between the rotating clamping blocks (109). A second assembly plate (116) is fixedly installed on one side of the rotating block (115).

7. A damper hinge for adjustable furniture cabinet door closure speed according to claim 6, characterized in that: The second assembly plate (116) is symmetrically provided with second assembly holes (117), and bolts pass through the second assembly holes (117) to fix it to the cabinet door.

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