Damping hinge

Abstract

The utility model discloses a damping hinge which comprises a door leaf hinge, a door frame hinge, an upper connecting sleeve and a lower connecting sleeve. A damper is rotatably arranged in the lower end part of the lower connecting sleeve, a connecting shaft is connected in the upper end part of the lower connecting sleeve, and the upper end part of the connecting shaft is arranged in the upper connecting sleeve; a pair of spiral grooves are oppositely formed in the side wall of the upper connecting sleeve, a pair of guide holes are formed in the connecting shaft, and the guide holes are formed in the longitudinal direction and correspond to the spiral grooves in a one-to-one mode; the upper end of a piston rod of the damper penetrates through a shaft hole in the middle of the connecting shaft to be 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 of the piston rod, and the guide shafts penetrate through the guide holes to be arranged in the corresponding spiral grooves. When the door leaf hinge is rotated, the spiral groove drives the guide shaft to drive the piston rod to move upwards or downwards, so that the damper slows down rotation of the door leaf hinge, the damping effect is achieved, the door leaf is prevented from rapidly impacting a door frame or a wall in the closing or opening process, and the door leaf and the door frame are effectively protected.

Description

Technical Field

[0001] This utility model relates to the field of hinge technology, and more specifically, to a damping hinge. Background Technology

[0002] A hinge, also known as a hinge leaf, is a mechanical device used to connect two objects or two parts of an object, allowing rotation between them. It is generally connected by a shaft to two hinge plates on both sides.

[0003] Hinges are commonly used in cabinet doors, windows, and other doors. However, the existing hinge structure is too simple. During the opening and closing of doors and windows, hinges do not have a damping effect, which can easily cause the door leaf to impact and damage the door leaf or door frame. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a unidirectional damper that is simple in structure, reliable, and easy to assemble.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A damping hinge includes a door leaf, a door frame, an upper connecting sleeve fixed inside the door leaf bushing, and a lower connecting sleeve fixed inside the door frame bushing.

[0007] The lower connecting sleeve is rotatably provided with a damper at its lower end and a connecting shaft is connected to its upper end, with the upper end of the connecting shaft placed inside the upper connecting sleeve.

[0008] The upper connecting sleeve has a pair of spiral grooves on its sidewalls, and the connecting shaft has a pair of guide holes. The guide holes are arranged in the longitudinal direction and correspond one-to-one with the spiral grooves.

[0009] The upper end of the piston rod of the damper passes through the shaft hole in the middle of the connecting shaft and is placed in the upper connecting sleeve. A pair of guide shafts adapted to the guide hole are connected to the side wall of the upper end of the piston rod. The guide shafts pass through the guide hole and are placed in the corresponding spiral groove.

[0010] The rotating door leaf is driven by the spiral groove, which in turn drives the guide shaft to move the piston rod up or down under the guidance of the guide hole, thereby slowing down the rotation of the door leaf.

[0011] The present invention is further provided with an adjustment component inside the upper connecting sleeve. The adjustment component includes an adjustment shaft, an adjustment spring, and a first adjustment nut threadedly connected to the end of the upper connecting sleeve, arranged from bottom to top inside the upper connecting sleeve.

[0012] The lower end of the adjusting shaft abuts against the piston rod, and the upper end abuts against the adjusting spring; by turning the first adjusting nut, the preload of the adjusting spring is changed, thereby changing the downward pressure of the adjusting shaft on the piston rod.

[0013] The present invention further includes: a positioning component is provided between the upper connecting sleeve and the lower connecting sleeve. The positioning component includes a positioning disc spring and a positioning element. The lower end face of the positioning element abuts against the positioning disc spring, and four positioning protrusions are provided at intervals on its upper end face. The four positioning protrusions are evenly distributed on the upper end face of the positioning element.

[0014] The lower end face of the upper connecting sleeve is provided with four positioning grooves that correspond one-to-one with the four positioning protrusions.

[0015] The positioning disc spring drives the four positioning protrusions of the positioning component to cooperate with the corresponding positioning grooves, positioning the door leaf in the closed or open position.

[0016] The present invention further comprises: the damper includes a housing, wherein the piston rod is rotatably disposed within a sealed cavity of the housing, and the sealed cavity is filled with damping oil;

[0017] A piston assembly is provided on one end of the piston rod. The piston assembly includes an upper piston rotatably mounted on the piston rod and a lower piston fixedly mounted on the piston rod. The outer sidewalls of the upper piston and the lower piston are attached to the inner sidewall of the outer shell, dividing the sealing cavity into an upper sealing cavity and a lower sealing cavity.

[0018] The lower piston is provided with an oil inlet hole and an annular groove on its upper end face. The upper piston is provided with an oil outlet hole, and the oil inlet hole and the oil outlet hole are connected through the annular groove.

[0019] When the piston rod rotates relative to the outer casing, it drives the lower piston to rotate relative to the upper piston, changing the distance between the oil inlet and the oil outlet.

[0020] The present invention is further provided with an oil passage hole at the lower end of the outer shell, and there is a gap between the side wall of the oil passage hole and the outer side wall of the upper piston and the lower piston.

[0021] When the piston rod drives the upper and lower pistons to the oil passage, the damping oil in the lower sealing cavity can quickly flow from the gap into the upper sealing cavity.

[0022] The present invention further includes: a bottom plug is movably disposed at the bottom of the lower sealing cavity, and a support spring is disposed at the lower end of the bottom plug. The lower end of the support spring abuts against the outer shell, and the upper end abuts against the lower end surface of the bottom plug.

[0023] The present invention is further provided that: the bottom end of the outer shell abuts against a second adjusting nut, and the second adjusting nut is threadedly connected to the end of the lower connecting sleeve;

[0024] By turning the second adjusting nut, the housing is pushed upward, causing the housing and piston rod to shift in the longitudinal direction, thereby adjusting the relative distance between the piston assembly and the oil passage.

[0025] The present invention further includes a hexagonal bearing hole at the bottom of the outer casing. By twisting the outer casing, the lower piston rotates relative to the upper piston relative to the piston rod.

[0026] The present invention is further provided with the following features: an anti-slip tail sleeve is fitted at the bottom of the outer shell, and a plurality of anti-slip protrusions are provided circumferentially on the side wall of the anti-slip tail sleeve, the anti-slip protrusions abutting against the inner side wall of the lower connecting sleeve.

[0027] The present invention further includes a bearing provided between the door leaf sleeve and the door frame sleeve.

[0028] The beneficial effects of this utility model are as follows: The damping hinge includes a door leaf installed on the door leaf, a door frame leaf installed on the door frame, an upper connecting sleeve fixed in the door leaf bushing, and a lower connecting sleeve fixed in the door frame bushing. A damper is rotatably installed in the lower end of the lower connecting sleeve, and a connecting shaft is connected to the upper end. A pair of spiral grooves are provided opposite to each other on the side wall of the upper connecting sleeve, and a pair of guide holes are provided on the connecting shaft, with the guide holes corresponding to the spiral grooves. The upper end of the piston rod of the damper cooperates with the spiral groove through the guide shaft, that is, the guide shaft passes through the guide hole and is placed in the corresponding spiral groove. When the door leaf is opened or closed, the door leaf rotates, and the spiral groove on the upper connecting sleeve drives the guide shaft to move the piston rod up or down under the guidance of the guide hole, so that the damper slows down the rotation of the door leaf, thus playing a damping role and preventing the door leaf from rapidly impacting the door frame or wall during closing or opening, effectively protecting the door leaf and door frame. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a damping hinge according to the present invention;

[0030] Figure 2 This is an exploded view of a damping hinge according to the present invention;

[0031] Figure 3 This is a diagram showing the fit between the damper and the upper connecting sleeve.

[0032] Figure 4 This is a diagram showing the fit between the damper and the adjustment assembly.

[0033] Figure 5 This is a diagram showing the fit between the upper connecting sleeve and the positioning component.

[0034] Figure 6 This is a schematic diagram of the damper.

[0035] Figure 7 This is a cross-sectional view of the damper.

[0036] Figure 8 This is a schematic diagram of the piston assembly.

[0037] Explanation of reference numerals in the attached drawings: 1. Door leaf; 11. Upper connecting sleeve; 111. Spiral groove; 112. Positioning groove; 2. Door frame leaf; 21. Lower connecting sleeve; 3. Damper; 31. Housing; 311. Hexagonal bearing hole; 312. Anti-slip tail sleeve; 3121. Anti-slip protrusion; 313. Upper sealing cavity; 314. Lower sealing cavity; 32. Piston rod; 321. Guide shaft; 33. Piston assembly; 331. Upper piston; 3311. Oil outlet; 332. Lower piston; 3321. Oil inlet; 3322. Annular groove; 34. Bottom plug; 35. Support spring; 36. Second adjusting nut; 4. Connecting shaft; 41. Guide hole; 5. Adjusting assembly; 51. Adjusting shaft; 52. Adjusting spring; 53. First adjusting nut; 6. Positioning assembly; 61. Positioning disc spring; 62. Positioning component; 621. Positioning protrusion; 7. Bearing. Detailed Implementation

[0038] See attached document Figures 1 to 8 The present invention provides a further detailed description of a damping hinge.

[0039] A damping hinge includes a door leaf hinge 1, a door frame hinge 2, an upper connecting sleeve 11 fixed in the bushing of the door leaf hinge 1, and a lower connecting sleeve 21 fixed in the bushing of the door frame hinge 2; wherein a bearing 7 is provided between the bushing of the door leaf hinge 1 and the bushing of the door frame hinge 2; wherein the door leaf hinge 1 is installed on the door leaf, and the door frame hinge 2 is installed on the door frame.

[0040] The lower connecting sleeve 21 is rotatably provided with a damper 3 at its lower end and a connecting shaft 4 is connected to its upper end. The upper end of the connecting shaft 4 is placed inside the upper connecting sleeve 11.

[0041] The upper connecting sleeve 11 has a pair of spiral grooves 111 arranged opposite to each other on its sidewall, and the connecting shaft 4 has a pair of guide holes 41 arranged in the longitudinal direction and corresponding one-to-one with the spiral grooves 111.

[0042] The upper end of the piston rod 32 of the damper 3 passes through the shaft hole in the middle of the connecting shaft 4 and is placed in the upper connecting sleeve. A pair of guide shafts 321 that are adapted to the guide hole 41 are connected to the side wall of the upper end of the piston rod 32. The guide shafts 321 pass through the guide hole 41 and are placed in the corresponding spiral groove 111.

[0043] When the door is opened or closed, the door leaf 1 rotates. The spiral groove 111 on the upper connecting sleeve 11 drives the guide shaft 321 to move the piston rod 32 up or down under the guidance of the guide hole 41. This causes the damper 3 to slow down the rotation of the door leaf 1, thus playing a damping role and preventing the door from hitting the door frame or wall quickly during the closing or opening process, effectively protecting the door leaf and the door frame.

[0044] The upper connecting sleeve 11 is provided with an adjustment component 5. The adjustment component 5 includes an adjustment shaft 51, an adjustment spring 52 and a first adjustment nut 53 threadedly connected to the end of the upper connecting sleeve 11, which are arranged from bottom to top in the upper connecting sleeve 11. The adjustment shaft 51 is movable up and down in the upper connecting sleeve 11. The end of the upper connecting sleeve 11 is provided with an internal thread that is adapted to the first adjustment nut 53.

[0045] The lower end of the adjusting shaft 51 abuts against the piston rod 32, and the upper end abuts against the adjusting spring 52; by turning the first adjusting nut 53, the preload of the adjusting spring 52 is changed, thereby changing the downward force of the adjusting shaft 51 on the piston rod 32.

[0046] When the first adjusting nut 53 is screwed down, it presses the adjusting spring 52 down, increasing the preload of the adjusting spring 52 and forcing the adjusting shaft 51 to increase the downward pressure on the piston rod 32. When the first adjusting nut 53 is screwed up, it releases the adjusting spring 52 upward, reducing the preload of the adjusting spring 52 and thus reducing the downward pressure of the adjusting shaft 51 on the piston rod 32. This changes the closing force of the door.

[0047] A positioning component 6 is provided between the upper connecting sleeve 11 and the lower connecting sleeve 21. The positioning component 6 includes a positioning disc spring 61 and a positioning member 62. The lower end face of the positioning member 62 abuts against the positioning disc spring 61, and four positioning protrusions 621 are provided at intervals on its upper end face. The four positioning protrusions 621 are evenly distributed on the upper end face of the positioning member 62.

[0048] The lower end face of the upper connecting sleeve 11 is provided with four positioning grooves 112 that correspond one-to-one with the four positioning protrusions 621;

[0049] The positioning disc spring 61 drives the four positioning protrusions 621 of the positioning member 62 to cooperate with the corresponding positioning grooves 112, positioning the door leaf 1 in the closed or open position, preventing the door leaf from closing or opening by itself, and playing a positioning role.

[0050] The damper 3 includes a housing 31, wherein the piston rod 32 is rotatably disposed within a sealed cavity of the housing 31, and the sealed cavity is filled with damping oil;

[0051] A piston assembly 33 is provided on one end of the piston rod 32. The piston assembly 33 includes an upper piston 331 rotatably mounted on the piston rod 32 and a lower piston 332 fixedly mounted on the piston rod 32. The connecting end of the piston rod 32 for mounting the piston assembly 33 is a flat shaft. The lower piston 332 has a flat hole in the middle that matches the flat shaft, and the upper piston 331 has a round hole in the middle. The lower piston 332 and the upper piston 331 are respectively fitted onto the flat shaft through the flat hole and the round hole. The sealing cavity of the lower connecting sleeve 21 is non-circular, the outer contour of the lower piston 332 is circular, and the outer contour of the upper piston 331 is non-circular that matches the sealing cavity. This allows the lower piston 332 to rotate with the piston rod 32 when the piston rod 32 is rotated, while the upper piston 331 rotates relative to the lower piston 332.

[0052] The outer walls of the upper piston 331 and the lower piston 332 are attached to the inner wall of the outer casing 31, dividing the sealed cavity into an upper sealing cavity 313 and a lower sealing cavity 314; the lower piston 332 is provided with an oil inlet 3321 and an annular groove 3322 on its upper end face; the upper piston 331 is provided with an oil outlet 3311; the oil inlet 3321 and the oil outlet 3311 are connected through the annular groove 3322.

[0053] When the piston rod 32 rotates relative to the outer casing 31, the piston rod 32 drives the lower piston 332 to rotate relative to the upper piston 331, changing the distance of the flow channel between the oil inlet 3321 and the oil outlet 3311. When it is necessary to increase the damping effect of the damper 3, the distance of the flow channel is increased to slow down the speed at which the damping oil flows from the lower sealing cavity 314 into the upper sealing cavity 313. When it is necessary to reduce the damping effect of the damper 3, the distance of the flow channel is shortened to speed up the speed at which the damping oil flows from the lower sealing cavity 314 into the upper sealing cavity 313.

[0054] The lower end of the outer casing 31 is provided with an oil passage hole, and there is a gap between the side wall of the oil passage hole and the outer side wall of the upper piston 331 and the lower piston 332. When the door is closed to a certain angle, the piston rod 32 drives the upper piston 331 and the lower piston 332 to the oil passage hole, and the damping oil in the lower sealing cavity 314 can quickly flow from the gap into the upper sealing cavity 313, so that the door can close quickly.

[0055] A bottom plug 34 is movably disposed at the bottom of the lower sealing cavity 314. A support spring 35 is disposed at the lower end of the bottom plug 34. The lower end of the support spring 35 abuts against the outer shell 31, and the upper end abuts against the lower end surface of the bottom plug 34. This allows the bottom plug 34 to move up and down under the action of the support spring 35. When the piston rod 32 drives the piston assembly 33 to move downward, the volume freed up in the upper sealing cavity 313 during this process is smaller than the volume of the lower sealing cavity 314 compressed downward by the piston assembly 33, causing the bottom plug 34 to move downward and compress the support spring 35. When the piston rod 32 drives the piston assembly 33 to move upward, the volume freed up in the upper sealing cavity 313 during this process is larger than the volume freed up in the lower sealing cavity 314 after the piston assembly 33 moves upward, causing the bottom plug 34 to move upward under the action of the support spring 35. This allows the upper sealing cavity 313 and the lower sealing cavity 314 to remain filled with damping oil.

[0056] The bottom end of the outer casing 31 abuts against the second adjusting nut 36, which is threadedly connected to the end of the lower connecting sleeve 21. By turning the second adjusting nut 36, the outer casing 31 is pushed upward, causing the outer casing 31 and the piston rod 32 to move in the longitudinal direction. This adjusts the relative distance between the piston assembly 33 and the oil passage, thereby increasing or decreasing the door closing angle, allowing for quick closing.

[0057] The bottom end of the housing 31 is provided with a hexagonal bearing hole 311. By twisting the housing 31, the housing 31 drives the lower piston 332 to rotate relative to the upper piston 331 relative to the piston rod 32, thereby quickly adjusting the damping magnitude of the damper 3.

[0058] The bottom end of the outer casing 31 is fitted with an anti-slip tail sleeve 312. The anti-slip tail sleeve 312 has several anti-slip protrusions 3121 circumferentially arranged on its sidewalls. These anti-slip protrusions 3121 abut against the inner sidewall of the lower connecting sleeve 21, preventing the outer casing 31 from rotating relative to the lower connecting sleeve 21. The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A damping hinge, characterized in that: Includes a door leaf, a door frame, an upper connecting sleeve fixed inside the door leaf bushing, and a lower connecting sleeve fixed inside the door frame bushing; The lower connecting sleeve is rotatably provided with a damper at its lower end and a connecting shaft is connected to its upper end, with the upper end of the connecting shaft placed inside the upper connecting sleeve. The upper connecting sleeve has a pair of spiral grooves on its sidewalls, and the connecting shaft has a pair of guide holes. The guide holes are arranged in the longitudinal direction and correspond one-to-one with the spiral grooves. The upper end of the piston rod of the damper passes through the shaft hole in the middle of the connecting shaft and is placed in the upper connecting sleeve. A pair of guide shafts adapted to the guide hole are connected to the side wall of the upper end of the piston rod. The guide shafts pass through the guide hole and are placed in the corresponding spiral groove. The rotating door leaf is driven by the spiral groove, which in turn drives the guide shaft to move the piston rod up or down under the guidance of the guide hole, thereby slowing down the rotation of the door leaf.

2. A damping hinge according to claim 1, characterized in that: An adjustment assembly is provided inside the upper connecting sleeve. The adjustment assembly includes an adjustment shaft, an adjustment spring, and a first adjustment nut that is threadedly connected to the end of the upper connecting sleeve, arranged from bottom to top inside the upper connecting sleeve. The lower end of the adjusting shaft abuts against the piston rod, and the upper end abuts against the adjusting spring; by turning the first adjusting nut, the preload of the adjusting spring is changed, thereby changing the downward pressure of the adjusting shaft on the piston rod.

3. A damping hinge according to claim 1 or 2, characterized in that: A positioning component is provided between the upper connecting sleeve and the lower connecting sleeve. The positioning component includes a positioning disc spring and a positioning element. The lower end face of the positioning element abuts against the positioning disc spring, and four positioning protrusions are provided at intervals on its upper end face. The four positioning protrusions are evenly distributed on the upper end face of the positioning element. The lower end face of the upper connecting sleeve is provided with four positioning grooves that correspond one-to-one with the four positioning protrusions. The positioning disc spring drives the four positioning protrusions of the positioning component to cooperate with the corresponding positioning grooves, positioning the door leaf in the closed or open position.

4. A damping hinge according to claim 3, characterized in that: The damper includes a housing, wherein the piston rod is rotatably disposed within a sealed cavity of the housing, the sealed cavity being filled with damping oil; A piston assembly is provided on one end of the piston rod. The piston assembly includes an upper piston rotatably mounted on the piston rod and a lower piston fixedly mounted on the piston rod. The outer sidewalls of the upper piston and the lower piston are attached to the inner sidewall of the outer shell, dividing the sealing cavity into an upper sealing cavity and a lower sealing cavity. The lower piston is provided with an oil inlet hole and an annular groove on its upper end face. The upper piston is provided with an oil outlet hole, and the oil inlet hole and the oil outlet hole are connected through the annular groove. When the piston rod rotates relative to the outer casing, it drives the lower piston to rotate relative to the upper piston, changing the distance between the oil inlet and the oil outlet.

5. A damping hinge according to claim 4, characterized in that: The lower end of the outer casing is provided with an oil passage hole, and there is a gap between the side wall of the oil passage hole and the outer side wall of the upper piston and the lower piston. When the piston rod drives the upper and lower pistons to the oil passage, the damping oil in the lower sealing cavity can quickly flow from the gap into the upper sealing cavity.

6. A damping hinge according to claim 5, characterized in that: A bottom plug is movably disposed at the bottom of the lower sealing cavity. A support spring is disposed at the lower end of the bottom plug. The lower end of the support spring abuts against the outer shell, and the upper end abuts against the lower end surface of the bottom plug.

7. A damping hinge according to claim 5, characterized in that: The bottom end of the outer casing abuts against a second adjusting nut, which is threadedly connected to the end of the lower connecting sleeve. By turning the second adjusting nut, the housing is pushed upward, causing the housing and piston rod to shift in the longitudinal direction, thereby adjusting the relative distance between the piston assembly and the oil passage.

8. A damping hinge according to claim 4, characterized in that: The bottom of the outer casing is provided with a hexagonal bearing hole. By twisting the outer casing, the lower piston rotates relative to the upper piston relative to the piston rod.

9. A damping hinge according to claim 8, characterized in that: The bottom of the outer casing is fitted with an anti-slip tail sleeve, and the side wall of the anti-slip tail sleeve is provided with a number of anti-slip protrusions in the circumferential direction. The anti-slip protrusions abut against the inner side wall of the lower connecting sleeve.

10. A damping hinge according to claim 1 or 2, characterized in that: A bearing is provided between the door leaf sleeve and the door frame sleeve.

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