CN-224213993-U - Damping hinge

Abstract

The utility model discloses a damping hinge which comprises a door leaf, a door frame leaf, an upper connecting sleeve and a lower connecting sleeve, wherein a damper is rotatably arranged at the lower end part of the lower connecting sleeve, a connecting shaft is connected in the upper end part of the lower connecting sleeve, the upper end part of the connecting shaft is arranged in the upper connecting sleeve, a pair of spiral grooves are oppositely arranged on the side wall of the upper connecting sleeve, a pair of guide holes are arranged on the connecting shaft in a longitudinal direction and are arranged in one-to-one correspondence with the spiral grooves, the upper end part of a piston rod of the damper passes through a shaft hole in the middle of the connecting shaft and is arranged in the upper connecting sleeve, a pair of guide shafts matched with the guide holes are connected to the side wall of the upper end part of the piston rod, the guide shafts pass through the guide holes and are arranged in the corresponding spiral grooves, the door leaf is rotated, and the spiral grooves drive the guide shafts to drive the piston rod to move upwards or downwards so that the door leaf of the damper is slowed down to rotate, the damping effect is achieved, the door leaf is prevented from being rapidly impacted on the door frame or the wall in the closing or opening process, and the door frame are effectively protected.

Inventors

• LUO HONG
• HUANG PEI

Assignees

• 揭阳市晟宏智能科技有限公司

Dates

Publication Date

20260508

Application Date

20250604

Claims (10)

1. 1. The damping hinge is characterized by comprising a door leaf, a door frame leaf, an upper connecting sleeve fixed in a door leaf shaft sleeve and a lower connecting sleeve fixed in a door frame leaf shaft sleeve; The lower end part of the lower connecting sleeve is internally provided with a damper in a rotating way, the upper end part of the lower connecting sleeve is internally connected with a connecting shaft, and the upper end part of the connecting shaft is arranged in the upper connecting sleeve; The side wall of the upper connecting sleeve is provided with a pair of spiral grooves oppositely, the connecting shaft is provided with a pair of guide holes, and the guide holes are arranged along the longitudinal direction and are arranged in one-to-one correspondence with the spiral grooves; The upper end part of a piston rod of the damper passes through a shaft hole in the middle of the connecting shaft and is arranged in the upper link sleeve, a pair of guide shafts matched with the guide holes are connected to the side wall of the upper end part of the piston rod, and the guide shafts pass through the guide holes and are arranged in corresponding spiral grooves; and the door leaf is rotated, and the spiral groove drives the guide shaft to drive the piston rod to move upwards or downwards under the guidance of the guide hole, so that the damper slows down the rotation of the door leaf.
2. 2. The damping hinge according to claim 1, wherein an adjusting assembly is arranged in the upper connecting sleeve, and the adjusting assembly comprises an adjusting shaft, an adjusting spring and a first adjusting nut, wherein the adjusting shaft is arranged in the upper connecting sleeve from bottom to top, and the first adjusting nut is connected in the end part of the upper connecting sleeve in a threaded manner; The lower end part of the adjusting shaft is propped against the piston rod, the upper end part of the adjusting shaft is propped against the adjusting spring, the pretightening force of the adjusting spring is changed by screwing the first adjusting nut, and the downward pressure force of the adjusting shaft to the piston rod is changed.
3. 3. The damping hinge according to claim 1 or 2, wherein a positioning assembly is arranged between the upper connecting sleeve and the lower connecting sleeve, the positioning assembly comprises a positioning disc spring and a positioning piece, the lower end face of the positioning piece is abutted against the positioning disc spring, four positioning protruding parts are arranged on the upper end face of the positioning piece at intervals, and the four positioning protruding parts are uniformly distributed on the upper end face of the positioning piece; Four positioning grooves which are in one-to-one correspondence with the four positioning convex parts are formed in the lower end face of the upper connecting sleeve at intervals; The positioning disc spring drives four positioning protruding parts of the positioning piece to be matched with corresponding positioning grooves, and the door leaf is positioned at a door closing position or a door opening position.
4. 4. The damping hinge according to claim 3, wherein the damper comprises a housing, wherein the piston rod is rotatably disposed in a sealed cavity of the housing, and the sealed cavity is filled with damping oil; a piston assembly is arranged at one end part of the piston rod, the piston assembly comprises an upper piston which is rotatably arranged on the piston rod and a lower piston which is fixedly arranged on the piston rod, the outer side walls of the upper piston and the lower piston are attached to the inner side wall of the shell, and the sealing cavity is divided into an upper sealing cavity and a lower sealing cavity; The lower piston is provided with an oil inlet, the upper end face of the lower piston is provided with an annular groove, the upper piston is provided with an oil outlet, and the oil inlet is communicated with the oil outlet through the annular groove; When the piston rod rotates relative to the shell, the piston rod drives the lower piston to rotate relative to the upper piston, and the distance between the oil inlet and the oil outlet is changed.
5. 5. The damping hinge according to claim 4, wherein the lower end of the housing is provided with an oil passing hole, and a gap exists between the side wall of the oil passing hole and the outer side walls of the upper piston and the lower piston; When the piston rod drives the upper piston and the lower piston to the oil passing hole, damping oil in the lower sealing cavity can flow into the upper sealing cavity from the gap rapidly.
6. 6. The damping hinge according to claim 5, wherein a bottom plug is movably arranged at the bottom of the lower sealing cavity, a supporting spring is arranged at the lower end of the bottom plug, the lower end of the supporting spring is abutted against the shell, and the upper end of the supporting spring is abutted against the lower end face of the bottom plug.
7. 7. The damping hinge according to claim 5, wherein the bottom end of the housing is abutted against a second adjusting nut, and the second adjusting nut is in threaded connection with the end part of the lower connecting sleeve; The second adjusting nut is screwed to push the shell to move upwards, so that the shell and the piston rod displace in the longitudinal direction, and the relative distance between the piston assembly and the oil passing hole is adjusted.
8. 8. The damping hinge as set forth in claim 4, wherein the bottom end of the housing is provided with a hexagonal socket, and the housing is screwed to rotate the lower piston relative to the upper piston relative to the piston rod.
9. 9. The damping hinge according to claim 8, wherein the bottom end of the outer shell is sleeved with an anti-slip tail sleeve, a plurality of anti-slip protrusions are circumferentially arranged on the side wall of the anti-slip tail sleeve, and the anti-slip protrusions are abutted against the inner side wall of the lower connecting sleeve.
10. 10. A damping hinge according to claim 1 or 2, wherein a bearing is provided between the door leaf boss and the door frame boss.

Description

Damping hinge Technical Field The utility model relates to the technical field of hinges, in particular to a damping hinge. Background Hinges, also known as hinges, are formally known as hinges, and are mechanical devices used to connect two objects or two parts of an object and allow rotation between them, typically by connecting two hinge plates on both sides by a shaft; The hinge is commonly used for cabinet doors, windows, doors and the like, the existing hinge structure is too simple, the hinge does not have damping effect in the opening and closing process of doors and windows, the phenomenon that a door leaf is impacted is easy to occur, and the door leaf or a door frame is damaged. Disclosure of utility model Aiming at the defects existing in the prior art, the utility model aims to provide the unidirectional damper which is simple and reliable in structure and easy to assemble. In order to achieve the above purpose, the present utility model provides the following technical solutions: a damping hinge comprises a door leaf, a door frame leaf, an upper connecting sleeve fixed in a door leaf shaft sleeve and a lower connecting sleeve fixed in a door frame leaf shaft sleeve; The lower end part of the lower connecting sleeve is internally provided with a damper in a rotating way, the upper end part of the lower connecting sleeve is internally connected with a connecting shaft, and the upper end part of the connecting shaft is arranged in the upper connecting sleeve; The side wall of the upper connecting sleeve is provided with a pair of spiral grooves oppositely, the connecting shaft is provided with a pair of guide holes, and the guide holes are arranged along the longitudinal direction and are arranged in one-to-one correspondence with the spiral grooves; The upper end part of a piston rod of the damper passes through a shaft hole in the middle of the connecting shaft and is arranged in the upper link sleeve, a pair of guide shafts matched with the guide holes are connected to the side wall of the upper end part of the piston rod, and the guide shafts pass through the guide holes and are arranged in corresponding spiral grooves; and the door leaf is rotated, and the spiral groove drives the guide shaft to drive the piston rod to move upwards or downwards under the guidance of the guide hole, so that the damper slows down the rotation of the door leaf. The utility model further provides that an adjusting assembly is arranged in the upper connecting sleeve, and the adjusting assembly comprises an adjusting shaft, an adjusting spring and a first adjusting nut, wherein the adjusting shaft is arranged in the upper connecting sleeve from bottom to top, and the first adjusting nut is connected in the end part of the upper connecting sleeve through threads; The lower end part of the adjusting shaft is propped against the piston rod, the upper end part of the adjusting shaft is propped against the adjusting spring, the pretightening force of the adjusting spring is changed by screwing the first adjusting nut, and the downward pressure force of the adjusting shaft to the piston rod is changed. The utility model further provides that a positioning assembly is arranged between the upper connecting sleeve and the lower connecting sleeve, the positioning assembly comprises a positioning disc spring and a positioning piece, the lower end face of the positioning piece is abutted against the positioning disc spring, four positioning protruding parts are arranged on the upper end face of the positioning piece at intervals, and the four positioning protruding parts are uniformly distributed on the upper end face of the positioning piece; Four positioning grooves which are in one-to-one correspondence with the four positioning convex parts are formed in the lower end face of the upper connecting sleeve at intervals; The positioning disc spring drives four positioning protruding parts of the positioning piece to be matched with corresponding positioning grooves, and the door leaf is positioned at a door closing position or a door opening position. The damper further comprises a shell, wherein the piston rod is rotatably arranged in a sealed cavity of the shell, and damping oil is filled in the sealed cavity; a piston assembly is arranged at one end part of the piston rod, the piston assembly comprises an upper piston which is rotatably arranged on the piston rod and a lower piston which is fixedly arranged on the piston rod, the outer side walls of the upper piston and the lower piston are attached to the inner side wall of the shell, and the sealing cavity is divided into an upper sealing cavity and a lower sealing cavity; The lower piston is provided with an oil inlet, the upper end face of the lower piston is provided with an annular groove, the upper piston is provided with an oil outlet, and the oil inlet is communicated with the oil outlet through the annular groove; When the piston rod rotates relative to the shell