An adjustable and convenient hidden damping hinge

Abstract

The present application relates to an adjustable and convenient hidden damping hinge, belonging to the technical field of hardware hinges, and includes a first mounting block, a second mounting block, a sliding block, a first rotating shaft, a second rotating shaft, a first leaf, and a limiting mechanism. In the present application, the sliding block is vertically slidably mounted in the mounting cavity of the second mounting block, and then the first rotating shaft and the second rotating shaft are connected by the first leaf. Then, by unlocking the limiting mechanism, the position of the sliding block in the mounting cavity can be adjusted, thereby adjusting the height of the door body, so that the position of the door body can be adapted to the door frame. After the adjustment is completed, the limiting component can be locked, without having to disassemble the whole hinge and re-drill and fix it, which is convenient, fast, and has high working efficiency.

Description

Technical Field

[0001] This application relates to the technical field of hardware hinges, and in particular, to an adjustable and convenient hidden damping hinge. Background Art

[0002] A hinge, also known as a hinge joint, is a mechanical device used to connect two solids and allow relative rotation between them. Hinges are very common in daily life and are widely used in various structures that need to open and close, such as doors, windows, cabinets, drawers, etc. It usually consists of two metal leaves and a pin or shaft that allows them to rotate.

[0003] In the related art, reference can be made to the Chinese invention patent with the publication number CN110847733A, which discloses that the hinge includes a first page plate, a second page plate and a rotating shaft. The first page plate and the second page plate are both pivotally connected to the rotating shaft; both the first page plate and the second page plate include a sandwich plate and reinforcing plates connected to opposite sides of the sandwich plate, and the reinforcing plates are made of fiber-reinforced composite materials.

[0004] After the installation between the door frame and the door body, due to the installation precision error, in order to ensure that the door frame and the door body can be jointed, it is often necessary to adjust the position between the door body and the door frame. However, the positions among the page plates, the rotating shaft and the door body of the above hinge are all fixed. Therefore, when installing the door frame and the door body, the relative position between the door frame and the door body is also fixed. If the position of the door body needs to be adjusted, it is necessary to reinstall the hinge and the door body, which is very inconvenient, the work efficiency is very low, and there is easily a gap between the door body and the door frame. Summary of the Invention

[0005] In order to facilitate the adjustment of the relative position between the door frame and the door body during the installation of the hinge, this application provides an adjustable and convenient hidden damping hinge.

[0006] An adjustable and convenient hidden damping hinge provided by this application adopts the following technical solutions:

[0007] An adjustable and convenient hidden damping hinge includes:

[0008] A first mounting block and a second mounting block, the first mounting block and the second mounting block are respectively embedded and fixed on the side edges of the door frame and the door body, and mounting cavities are respectively formed on the opposite side walls of the first mounting block and the second mounting block;

[0009] A sliding block, the sliding block is vertically slidably arranged in the mounting cavity of the second mounting block;

[0010] A first rotating shaft, the first rotating shaft is rotatably arranged on the first mounting block and is located in the mounting cavity;

[0011] A second rotating shaft, which is rotatably arranged on the sliding block;

[0012] A first blade, with both ends of the first blade respectively arranged on the first rotating shaft and the second rotating shaft;

[0013] A limiting mechanism, which is arranged on the second mounting block and is used to limit the vertical position of the sliding block in the installation cavity.

[0014] By adopting the above technical solution, the first mounting block and the second mounting block are respectively embedded and fixed on the side edges of the door frame and the door body. The sliding block is vertically slidably mounted in the installation cavity of the second mounting block, and then the first rotating shaft and the second rotating shaft are connected by the first blade. Then, by unlocking the limiting mechanism, the position of the sliding block in the installation cavity can be adjusted, so as to adjust the height of the door body, making the position of the door body adaptable to the door frame. After the adjustment is completed, the limiting component can be locked, without the need to disassemble the hinge as a whole and re-drill and fix it, which is convenient, fast and has high work efficiency.

[0015] Optionally, the limiting mechanism includes:

[0016] A limiting block, which is arranged on the sliding block, and a strip-shaped hole is vertically formed in the limiting block;

[0017] A limiting screw rod, a threaded hole is formed in the second mounting block, the limiting screw rod passes through the strip-shaped hole and is in threaded connection with the threaded hole, and the head of the limiting screw rod abuts against the limiting block.

[0018] By adopting the above technical solution, a strip-shaped hole is vertically formed in the limiting block. By loosening the limiting screw rod, the position of the sliding block can be adjusted by adjusting the position of the limiting screw rod in the strip-shaped hole. When the sliding block moves to the target position, turn the limiting screw rod so that the head of the limiting screw rod abuts against the limiting block, which is convenient, fast and has high work efficiency.

[0019] Optionally, a third rotating shaft is rotatably arranged on the first mounting block, a fourth rotating shaft is rotatably arranged on the sliding block, and two second blades are arranged on the third rotating shaft and the fourth rotating shaft. The two second blades are respectively located on both sides of the first blade in the vertical direction.

[0020] By adopting the above technical solution, the third rotating shaft and the fourth rotating shaft are arranged, and then two second blades are installed on the third rotating shaft and the fourth rotating shaft. Then, the cooperation of the second blades and the first blade ensures the stability and smoothness when the door body is opened and closed.

[0021] Optionally, bending portions are provided on both the first page piece and the second page piece. The bending portions of the first page piece and the second page piece are aligned in the vertical direction. Through holes communicating with each other are formed in the bending portions of the first page piece and the second page piece, and a through shaft is rotatably installed in the through holes.

[0022] By adopting the above technical solution, bending portions are provided on both the first page piece and the second page piece, and the first page piece and the second page piece are connected by a through shaft, thereby greatly improving the structural strength and stability of the first page piece and the second page piece, making them not easily deformed when bearing the weight of a door or a window, and thus improving the overall strength and durability of the hinge.

[0023] Optionally, a damping mechanism for providing damping to the rotation work on the fourth rotating shaft is provided on the sliding block. The damping mechanism includes:

[0024] A hydraulic damper, which is provided on the sliding block;

[0025] A rotating shaft sleeve, which is rotatably provided on the sliding block. A connecting block is provided on the outer side wall of the rotating shaft sleeve, and the connecting block is connected to the fourth rotating shaft. The rotating shaft sleeve sleeves the hydraulic damper;

[0026] A transmission shaft, which is provided in the rotating shaft sleeve;

[0027] A movable sleeve, which is provided on the transmission shaft. The interior of the movable sleeve is hollow, and an inclined sliding hole is formed in the side wall of the movable sleeve along the axial direction of the transmission shaft;

[0028] A hydraulic push rod, one end of which is slidably provided on the hydraulic damper, and the other end of the hydraulic push rod extends into the movable sleeve;

[0029] A pin, one end of which is provided on the end of the hydraulic push rod located in the movable sleeve, and the other end of the pin is slidably installed in the sliding hole.

[0030] By adopting the above technical solution, a hydraulic damper is installed on the sliding block, and a rotating shaft sleeve is installed on the fourth rotating shaft through a connecting block. Then, when the door body moves to drive the first page piece and the second page piece to rotate, the two second page pieces rotate to drive the fourth rotating shaft to rotate, the fourth rotating shaft rotates to drive the connecting block and the rotating shaft sleeve to rotate, the rotating shaft sleeve rotates to drive the transmission shaft to rotate, the transmission shaft rotates to drive the movable sleeve to rotate, the movable sleeve rotates to drive the pin to move through the sliding hole, the pin moves to drive the hydraulic push rod to move. Then, the hydraulic damper adds damping to the rotation work of the fourth rotating shaft by applying damping to the hydraulic push rod, thereby adding damping to the rotation work of the door body, providing a smooth and controlled door closing experience, reducing the impact and noise generated during the door closing process, reducing the loss during the relative movement between the door body and the door frame, and improving the service life of the door body and the door frame.

[0031] Optionally, a hydraulic chamber is formed inside the hydraulic damper. A head pin adjusting rod is slidably arranged on the hydraulic damper. One end of the head pin adjusting rod is located outside the hydraulic damper, and the other end of the head pin adjusting rod extends into the hydraulic chamber to adjust the magnitude of the compressed flow rate in the hydraulic chamber. An adjusting assembly is arranged on the sliding block, and the adjusting assembly adjusts the sliding position of the head pin adjusting rod.

[0032] By adopting the above technical solution, a head pin adjusting rod is arranged on the hydraulic damper, and then the position of the head pin adjusting rod is adjusted by the adjusting assembly, so as to adjust the magnitude of the compressed flow rate in the hydraulic chamber of the hydraulic damper through the head pin adjusting rod, thereby realizing the work of adjusting the opening speed of the door.

[0033] Optionally, the adjusting assembly includes:

[0034] A first adjusting screw rod, which is threadedly connected to the sliding block and the bottom end of which is connected to the head pin adjusting rod;

[0035] A first adjusting gear, which is arranged on the top end of the adjusting screw rod;

[0036] A second adjusting screw rod, which is threadedly connected to the sliding block, and an internal hexagonal hole is formed in the head of the second adjusting screw rod;

[0037] A second adjusting gear, which is arranged on the second adjusting screw rod and meshes with the first adjusting gear.

[0038] By adopting the above technical solution, the second adjusting screw rod is rotated through the internal hexagonal hole. The rotation of the second adjusting screw rod drives the second adjusting gear to rotate. The rotation of the second adjusting gear drives the first adjusting gear to rotate. The rotation of the first adjusting gear drives the first adjusting screw rod to rotate. The rotation of the first adjusting screw rod drives the head pin adjusting rod to move, thereby realizing the position movement of the head pin adjusting rod.

[0039] Optionally, a return spring is sleeved on the transmission shaft. One end of the return spring is connected to the inner bottom wall of the rotating shaft sleeve, and the other end of the return spring abuts against one end of the pin protruding out of the sliding hole.

[0040] By adopting the above technical solution, a return spring is sleeved on the transmission shaft, and the return spring expands and contracts as the pin moves, so that after the door body moves to drive the pin to move, the return spring can drive the pin to move back to its original position.

[0041] Optionally, clamping grooves are formed on both the first mounting block and the second mounting block. Decorative cover plates are covered on both the first mounting block and the second mounting block. Clamping blocks are arranged on the decorative cover plates, and the clamping blocks are in clamping fit with the clamping grooves.

[0042] By adopting the above technical solution, a decorative cover plate is snap-fitted on the first mounting block and the second mounting block through a snap-fitting groove, and part of the mounting cavity is covered by the decorative cover plate, so that the side surface of the first mounting block is more beautiful and dust in the environment will not accumulate inside the mounting cavity.

[0043] In summary, the present application includes at least one of the following beneficial technical effects:

[0044] 1. By vertically sliding and installing a sliding block in the mounting cavity of the second mounting block, and then connecting the first rotating shaft and the second rotating shaft through the first blade, the position of the sliding block in the mounting cavity can be adjusted by unlocking the limiting mechanism, so as to adjust the height of the door body, making the position of the door body adaptable to the door frame. After the adjustment is completed, the limiting component can be locked, without having to disassemble the hinge as a whole and re-drill and fix it, which is convenient and fast and has high work efficiency;

[0045] 2. By arranging bending parts on both the first blade and the second blade, and connecting the first blade and the second blade through a through shaft, the structural strength and stability of the first blade and the second blade are greatly improved, making them not easily deformed when bearing the weight of a door or a window, thus improving the overall strength and durability of the hinge;

[0046] 3. By snap-fitting a decorative cover plate on the first mounting block and the second mounting block through a snap-fitting groove, and covering part of the mounting cavity with the decorative cover plate, the side surface of the first mounting block is made more beautiful and dust in the environment will not accumulate inside the mounting cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is a three-dimensional structural schematic diagram of the present application;

[0048] Figure 2 is a structural schematic diagram of the limiting mechanism in the present application, in which the side wall of the second mounting block is sectioned;

[0049] Figure 3 is a structural schematic diagram of the damping mechanism in the present application, in which the side wall of the rotating shaft sleeve is sectioned.

[0050] Reference numerals: 11, first mounting block; 12, second mounting block; 13, sliding block; 14, first rotating shaft; 15, second rotating shaft; 16, first blade; 17, limiting mechanism; 18, limiting block; 19, limiting screw; 21, strip-shaped hole; 22, third rotating shaft; 23, fourth rotating shaft; 24, second blade; 25, bending portion; 26, through shaft; 3, damping mechanism; 31, hydraulic damper; 32, rotating shaft sleeve; 33, transmission shaft; 34, movable sleeve; 35, hydraulic push rod; 36, pin; 37, connecting block; 38, sliding hole; 39, return spring; 41, head pin adjusting rod; 42, adjusting assembly; 43, first adjusting screw; 44, first adjusting gear; 45, second adjusting screw; 46, second adjusting gear; 47, hexagon socket; 48, decorative cover plate; 49, clamping block. Detailed implementation manners

[0051] The following further describes the present application in detail with reference to the Figure 1 - appended Figure 3 drawings.

[0052] An embodiment of the present application discloses an adjustable and convenient hidden damping hinge.

[0053] Referring to Figure 1 , the adjustable and convenient hidden damping hinge includes a first mounting block 11, a second mounting block 12, a sliding block 13, a first rotating shaft 14, a second rotating shaft 15, a first blade 16 and a limiting mechanism 17. The first mounting block 11 and the second mounting block 12 are respectively embedded and fixed on the side edges of the door frame and the door body. Mounting cavities are provided on the opposite side walls of the first mounting block 11 and the second mounting block 12.

[0054] Referring to Figure 1 , the sliding block 13 is vertically slidably mounted in the mounting cavity of the second mounting block 12, and the first rotating shaft 14 is rotatably mounted in the mounting cavity of the first mounting block 11. The second rotating shaft 15 is rotatably mounted on the sliding block 13 and is located in the mounting cavity. The two ends of the first blade 16 are respectively fixedly mounted on the first rotating shaft 14 and the second rotating shaft 15. The limiting mechanism 17 is provided on the second mounting block 12 and is used for limiting the vertical position of the sliding block 13 in the mounting cavity.

[0055] Referring to Figure 2 , the limiting mechanism 17 includes a limiting block 18 and a limiting screw 19. The limiting block 18 is fixedly mounted on the upper surface of the sliding block 13. A strip-shaped hole 21 is vertically provided on the limiting block 18. A threaded hole is provided on the outer side wall of the sliding block 13. The limiting screw 19 is slidably penetrated through the strip-shaped hole 21 and is threadedly connected with the threaded hole. The head of the limiting screw 19 abuts against the surface of the limiting block 18.

[0056] Referring to Figure 2 and Figure 3, a third rotating shaft 22 is rotatably installed in the installation cavity of the first installation block 11, and a fourth rotating shaft 23 is rotatably installed on the sliding block 13. Two second vanes 24 are fixedly installed on the third rotating shaft 22 and the fourth rotating shaft 23, and the two second vanes 24 are respectively located on both sides of the first vane 16 in the vertical direction. Bending portions 25 are provided on both the first vane 16 and the second vane 24. The bending portions 25 of the first vane 16 and the second vane 24 are aligned in the vertical direction, and through holes communicating with each other are provided on the bending portions 25 of the first vane 16 and the second vane 24. A through shaft 26 is rotatably installed in the through holes.

[0057] Refer to Figure 2 and Figure 3 , a damping mechanism 3 for providing damping to the rotation work on the fourth rotating shaft 23 is provided on the sliding block 13. The damping mechanism 3 includes a hydraulic damper 31, a rotating shaft sleeve 32, a transmission shaft 33, a movable sleeve 34, a hydraulic push rod 35 and a pin 36. The hydraulic damper 31 is fixedly installed on the lower surface of the sliding block 13. The rotating shaft sleeve 32 is rotatably installed on the sliding block 13 and sleeves the hydraulic damper 31. A connecting block 37 is fixedly installed on the outer side wall of the rotating shaft sleeve 32, and the connecting block 37 is fixedly connected to the fourth rotating shaft 23. The transmission shaft 33 is fixedly connected to the inner bottom wall of the rotating shaft sleeve 32. The movable sleeve 34 is fixedly installed on the top end of the transmission shaft 33. The inside of the movable sleeve 34 is hollow, and an inclined sliding hole 38 is provided on the outer side wall of the movable sleeve 34 along the axial direction of the transmission shaft 33. One end of the hydraulic push rod 35 is slidably arranged on the hydraulic damper 31, and the other end of the hydraulic push rod 35 extends into the movable sleeve 34. One end of the pin 36 is fixedly installed on the end of the hydraulic push rod 35 located in the movable sleeve 34, and the other end of the pin 36 is slidably installed in the sliding hole 38.

[0058] Refer to Figure 2 and Figure 3 , when the movement of the door body drives the first vane 16 and the second vane 24 to rotate, the two second vanes 24 rotate to drive the fourth rotating shaft 23 to rotate, the fourth rotating shaft 23 rotates to drive the connecting block 37 and the rotating shaft sleeve 32 to rotate, the rotating shaft sleeve 32 rotates to drive the transmission shaft 33 to rotate, the transmission shaft 33 rotates to drive the movable sleeve 34 to rotate, the rotation of the movable sleeve 34 drives the pin 36 to move through the sliding hole 38, and the movement of the pin 36 drives the hydraulic push rod 35 to move. Then, the hydraulic damper 31 adds damping to the rotation work of the fourth rotating shaft 23 by applying damping to the hydraulic push rod 35, thereby adding damping to the rotation work of the door body, providing a smooth and controlled door closing experience, reducing the impact and noise generated during the door closing process, and improving the service life of the door body and the door frame.

[0059] Refer to Figure 3, a return spring 39 is sleeved on the transmission shaft 33. One end of the return spring 39 is connected to the inner bottom wall of the rotating shaft sleeve 32, and the other end of the return spring 39 abuts against the end of the pin 36 that passes through the sliding hole 38. Thus, after the door body moves to drive the pin 36 to move, the return spring 39 can drive the pin 36 to move back to its original position.

[0060] Refer to Figure 2 and Figure 3 , a hydraulic cavity is formed inside the hydraulic damper 31, and a head pin adjusting rod 41 is slidably mounted on the hydraulic damper 31. One end of the head pin adjusting rod 41 is located outside the hydraulic damper 31, and the other end of the head pin adjusting rod 41 extends into the hydraulic cavity to adjust the size of the compressed flow rate inside the hydraulic cavity. An adjusting assembly 42 is provided on the sliding block 13, and the adjusting assembly 42 adjusts the sliding position of the head pin adjusting rod 41.

[0061] Refer to Figure 2 and Figure 3 , the adjusting assembly 42 includes a first adjusting screw 43, a first adjusting gear 44, a second adjusting screw 45 and a second adjusting gear 46. The first adjusting screw 43 is threadedly connected to the upper surface of the sliding block 13 and its bottom end is connected to the head pin adjusting rod 41. The first adjusting gear 44 is fixedly connected to the top end of the adjusting screw. The second adjusting screw 45 is threadedly connected to the upper surface of the sliding block 13 and its head is provided with an internal hexagonal hole 47. The second adjusting gear 46 is fixedly installed on the top end of the second adjusting screw 45 and meshes with the first adjusting gear 44.

[0062] Refer to Figure 3 , by rotating the second adjusting screw 45 through the internal hexagonal hole 47, the rotation of the second adjusting screw 45 drives the second adjusting gear 46 to rotate. The rotation of the second adjusting gear 46 drives the first adjusting gear 44 to rotate. The rotation of the first adjusting gear 44 drives the first adjusting screw 43 to rotate. The rotation of the first adjusting screw 43 drives the head pin adjusting rod 41 to move, thereby realizing the position movement of the head pin adjusting rod 41.

[0063] Refer to Figure 1 , clamping grooves are formed on the side edges of the first mounting block 11 and the second mounting block 12 at the opening of the mounting cavity. Decorative cover plates 48 are covered on both the first mounting block 11 and the second mounting block 12. Clamping blocks 49 that are clamped and matched with the clamping grooves are fixedly installed on the decorative cover plates 48. The decorative cover plates 48 cover part of the mounting cavity.

[0064] The working principle of the embodiment of the present application is as follows:

[0065] The sliding block 13 is vertically and slidably installed in the installation cavity of the second installation block 12. Then, the first rotating shaft 14 and the second rotating shaft 15 are connected by the first blade 16. By loosening the limit screw 19, the position of the sliding block 13 in the installation cavity can be adjusted, thereby adjusting the height of the door body so that the position of the door body can be adapted to the door frame. After the adjustment is completed, turn the limit screw 19 so that the head of the limit screw 19 abuts against the limit block 18. There is no need to disassemble the hinge as a whole and re-drill and fix it, which is convenient and fast, and has high work efficiency.

[0066] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An adjustable and convenient hidden damping hinge, characterized in that: Including: A first mounting block (11) and a second mounting block (12), the first mounting block (11) and the second mounting block (12) are respectively embedded and fixed on the side edges of the door frame and the door body, and mounting cavities are formed on the opposite side walls of the first mounting block (11) and the second mounting block (12); A sliding block (13), the sliding block (13) is vertically slidably arranged in the mounting cavity of the second mounting block (12); A first rotating shaft (14), the first rotating shaft (14) is rotatably arranged on the first mounting block (11) and is located in the mounting cavity; A second rotating shaft (15), the second rotating shaft (15) is rotatably arranged on the sliding block (13); A first blade (16), both ends of the first blade (16) are respectively arranged on the first rotating shaft (14) and the second rotating shaft (15); A limiting mechanism (17), the limiting mechanism (17) is arranged on the second mounting block (12) and is used for limiting the vertical position of the sliding block (13) in the mounting cavity; A third rotating shaft (22) and a fourth rotating shaft (23), the third rotating shaft (22) is rotatably arranged on the first mounting block (11), the fourth rotating shaft (23) is rotatably arranged on the sliding block (13), two second blades (24) are arranged on the third rotating shaft (22) and the fourth rotating shaft (23), the two second blades (24) are respectively located on both sides of the first blade (16) in the vertical direction, and a damping mechanism (3) for providing damping for the rotation work on the fourth rotating shaft (23) is arranged on the sliding block (13), and the damping mechanism (3) includes: A hydraulic damper (31), the hydraulic damper (31) is arranged on the sliding block (13), a hydraulic cavity is formed inside the hydraulic damper (31), a head pin adjusting rod (41) is slidably arranged on the hydraulic damper (31), one end of the head pin adjusting rod (41) is located outside the hydraulic damper (31), and the other end of the head pin adjusting rod (41) extends into the hydraulic cavity to adjust the size of the compressed flow in the hydraulic cavity. An adjusting component (42) is arranged on the sliding block (13), and the adjusting component (42) adjusts the sliding position of the head pin adjusting rod (41). The adjusting component (42) includes a first adjusting screw (43), a first adjusting gear (44), a second adjusting screw (45) and a second adjusting gear (46). The first adjusting screw (43) is threadedly connected to the sliding block (13) and the bottom end is connected to the head pin adjusting rod (41); the first adjusting gear (44) is arranged on the top end of the adjusting screw; the second adjusting screw (45) is threadedly connected to the sliding block (13), and an internal hexagonal hole (47) is formed in the head of the second adjusting screw (45); the second adjusting gear (46) is arranged on the second adjusting screw (45) and meshes with the first adjusting gear (44); Rotating shaft sleeve (32), the rotating shaft sleeve (32) is rotatably arranged on the sliding block (13), a connecting block (37) is arranged on the outer side wall of the rotating shaft sleeve (32), the connecting block (37) is connected to the fourth rotating shaft (23), and the rotating shaft sleeve (32) sleeves the hydraulic damper (31); Drive shaft (33), the drive shaft (33) is arranged inside the rotating shaft sleeve (32); Movable sleeve (34), the movable sleeve (34) is arranged on the drive shaft (33), the interior of the movable sleeve (34) is hollow, and an inclined sliding hole (38) is formed in the side wall of the movable sleeve (34) along the axial direction of the drive shaft (33); Hydraulic push rod (35), one end of the hydraulic push rod (35) is slidably arranged on the hydraulic damper (31), and the other end of the hydraulic push rod (35) extends into the movable sleeve (34); Pin (36), one end of the pin (36) is arranged on the end of the hydraulic push rod (35) located inside the movable sleeve (34), and the other end of the pin (36) is slidably installed in the sliding hole (38).

2. The adjustable and convenient hidden damping hinge according to claim 1, wherein: The limiting mechanism (17) includes: Limiting block (18), the limiting block (18) is arranged on the sliding block (13), and a strip-shaped hole (21) is formed in the limiting block (18) along the vertical direction; Limiting screw (19), a threaded hole is formed in the second mounting block (12), the limiting screw (19) passes through the strip-shaped hole (21) and is threadedly connected to the threaded hole, and the head of the limiting screw (19) abuts against the limiting block (18).

3. The adjustable and convenient hidden damping hinge according to claim 1, wherein: Bending portions (25) are arranged on both the first vane (16) and the second vane (24), the bending portions (25) of the first vane (16) and the second vane (24) are aligned in the vertical direction, through holes communicating with each other are formed in the bending portions (25) of the first vane (16) and the second vane (24), and a through shaft (26) is rotatably installed in the through holes.

4. An adjustable and convenient hidden damping hinge according to claim 1, characterized in that: A return spring (39) is sleeved on the drive shaft (33), one end of the return spring (39) is connected to the inner bottom wall of the rotating shaft sleeve (32), and the other end of the return spring (39) abuts against the end of the pin (36) protruding outside the sliding hole (38).

5. An adjustable and convenient hidden damping hinge according to claim 1, characterized in that: Clamping grooves are formed on both the first mounting block (11) and the second mounting block (12), decorative cover plates (48) are covered on both the first mounting block (11) and the second mounting block (12), clamping blocks (49) are arranged on the decorative cover plates (48), and the clamping blocks (49) are in clamping fit with the clamping grooves.

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