Limiting and adjusting structure for hinge
By introducing a limiting design of the main adjusting block and the main adjusting screw into the hinge structure, combined with the adjusting action of the secondary adjusting block and the secondary adjusting screw, the problem of the door panel shifting downward after prolonged use of the hinge is solved, ensuring a stable connection between the door and the door frame and normal use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG TUDUN DOOR IND CO LTD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-07
AI Technical Summary
Existing hinge structures are prone to causing the door panel to shift downwards in the vertical direction after prolonged use, resulting in misalignment between the door panel and the door frame and problems with opening and closing the door.
A hinge limit adjustment structure was designed, including a main adjustment block and a main adjustment screw. The main adjustment screw supports and limits the left leaf box to prevent it from moving downward under the weight of the door panel. At the same time, the auxiliary adjustment block and auxiliary adjustment screw further adjust and limit the hinge to ensure a stable connection between the door and the door frame.
It effectively prevents the door panel from shifting downwards under gravity, maintains a stable connection between the door and the door frame, improves the performance and sealing of the hinges, and prevents misalignment between the door panel and the door frame and jamming when opening and closing the door.
Smart Images

Figure CN224468979U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mechanical technology and relates to a limit adjustment structure for hinges, particularly a limit adjustment structure for hinges that can prevent the hinge from moving downwards. Background Technology
[0002] Door hinges are accessories that connect doors, windows, cabinet doors, and other objects to enable rotation. They can be divided into four main categories: ordinary hinges, suitable for regular doors and windows, and require a catch for fixing; pipe hinges (spring hinges), which support multi-directional adjustment and are suitable for furniture door panels of a certain thickness; bearing-type door hinges, which have high load-bearing capacity and are mostly used for security doors; and glass hinges, which are designed specifically for frameless glass doors.
[0003] When selecting a hinge, it is necessary to match it according to the material's sealing performance, blade thickness, sliding flexibility, and the door's weight and thickness, ensuring that the hinge shafts are aligned with the same vertical line and are fixed with matching screws.
[0004] During hinge installation, in order to ensure that the door and the door frame are in the right relative position, that the door and the door frame are in the right position in all directions, and to ensure the airtightness between the door and the door frame, adjustment holes and adjustment screws are usually set on the hinge structure to adjust the position of the hinge in the up, down, left and right directions.
[0005] However, after prolonged use, the weight of the door panel can cause it to shift downwards in the vertical direction, leading to misalignment between the door panel and the door frame, as well as difficulty in opening and closing the door.
[0006] In summary, to address the shortcomings of existing hinge structures, this utility model designs a hinge limit adjustment structure with a reasonable structure and good performance. Summary of the Invention
[0007] To address the problems existing in the prior art, this utility model provides a hinge limit adjustment structure with a reasonable structure and good performance.
[0008] The objective of this utility model can be achieved through the following technical solution: a hinge limit adjustment structure, comprising:
[0009] The left page box is embedded in the door frame. The upper and lower ends of the left page box extend outward to form an upper mounting part and a lower mounting part, respectively. Each mounting part has two adjustment holes, and an adjustment bolt is inserted through each adjustment hole.
[0010] The right page box is embedded in the door panel. The upper and lower ends of the right page box extend outward to form an upper connecting part and a lower connecting part, and two fixing bolts are inserted through each connecting part.
[0011] The main adjustment block is located below the lower mounting part and connected to the door frame. At least one main adjustment screw is inserted through the main adjustment block in the vertical direction, and the top of the main adjustment screw abuts against the lower mounting part.
[0012] As a further improvement to this case, two first set screws are provided on the main adjustment block, and the first set screws are partially embedded inside the door frame.
[0013] As a further improvement in this case, the main adjusting screw is located between the two first set screws.
[0014] As a further improvement to this invention, a secondary adjustment block is provided above the upper mounting part, and a secondary adjustment screw is passed through the secondary adjustment block in the vertical direction, with the bottom of the secondary adjustment screw able to approach or move away from the upper mounting part.
[0015] As a further improvement in this case, two second set screws that are fixed to the door frame are horizontally inserted on the secondary adjustment block, and the secondary adjustment screw is located between the two second set screws.
[0016] Compared with existing technologies, this utility model has a reasonable structural design. Through the cooperation of the main adjusting block and the main adjusting screw, the vertical position of the left leaf box can be finely adjusted, facilitating installation and subsequent maintenance. At the same time, the main adjusting screw supports and limits the left leaf box, preventing it from shifting downwards under the weight of the door panel and ensuring normal door use. In addition, the auxiliary adjusting block and auxiliary adjusting screw, working in conjunction with the main adjusting block and the main adjusting screw, further limit and adjust the position of the left leaf box, improving the overall performance of the hinge. Attached Figure Description
[0017] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention.
[0018] Figure 2 This is a schematic diagram of the hinge structure in this utility model.
[0019] Figure 3 yes Figure 2 A structural diagram from another perspective.
[0020] Figure 4 This is a structural schematic diagram of Embodiment 2 of this utility model.
[0021] Figure 5 yes Figure 4 A schematic diagram of the structure of the hinge.
[0022] In the diagram, 10 is the left page box; 11 is the upper mounting part; 12 is the lower mounting part; 13 is the adjusting bolt; 14 is the adjusting hole; 20 is the right page box; 21 is the upper connecting part; 22 is the lower connecting part; 23 is the fixing bolt; 31 is the main adjusting block; 311 is the main adjusting screw; 312 is the first set screw; 32 is the secondary adjusting block; 321 is the secondary adjusting screw; and 322 is the second set screw. Detailed Implementation
[0023] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.
[0024] like Figures 1 to 3 As shown, the limit adjustment structure of this hinge includes:
[0025] The left page box 10 is embedded in the door frame. The upper and lower ends of the left page box 10 extend outward to form an upper mounting part 11 and a lower mounting part 12, respectively. Each mounting part is provided with two adjustment holes 14, and an adjustment bolt 13 is inserted through each adjustment hole 14.
[0026] The right page box 20 is embedded in the door panel. The upper and lower ends of the right page box 20 extend outward to form an upper connecting part 21 and a lower connecting part 22, respectively. Two fixing bolts 23 are inserted through each connecting part.
[0027] The main adjustment block 31 is located below the lower mounting part 12 and connected to the door frame. At least one main adjustment screw 311 is provided on the main adjustment block 31 along the vertical direction, and the top of the main adjustment screw 311 abuts against the lower mounting part 12.
[0028] The hinge structure is equipped with adjustment holes 14 and adjustment screws to adjust the position of the hinge in the up, down, left and right directions, so that the door and the door frame are in a proper position in all directions, while ensuring the airtightness between the door and the door frame.
[0029] However, after prolonged use, the weight of the door panel can cause it to shift downwards in the vertical direction, resulting in misalignment between the door panel and the door frame, as well as difficulty in opening and closing the door.
[0030] To address this, the present invention provides a hinge limiting adjustment structure. Through the cooperation of the main adjusting block 31 and the main adjusting screw 311, the position of the left page box 10 in the vertical direction can be finely adjusted, facilitating installation and subsequent maintenance. At the same time, the main adjusting screw 311 can support the left page box 10 and limit its movement, preventing the left page box 10 from shifting downwards under the weight of the door panel, thus ensuring the normal use of the door.
[0031] Specifically, the left page box 10 is embedded in the door frame and fixed to it via adjusting bolts 13 on the upper mounting part 11 and the lower mounting part 12. An adjusting hole 14 is provided to allow the adjusting bolts 13 to be adjusted relative to the adjusting bolts 13. During actual installation, the left page box 10 can be adjusted vertically by changing the position of the adjusting hole 14 relative to the adjusting bolts 13. The right page box 20 is embedded in the door panel and fixed to it via fixing bolts 23 on the upper connecting part 21 and the lower connecting part 22, ensuring structural stability.
[0032] In this embodiment, a main adjustment block 31 is preferably provided below the lower mounting part 12, and the position of the left page box 10 is adjusted in conjunction with the main adjustment screw 311. Rotate the main adjustment screw 311 close to the lower mounting part 12. When the main adjustment screw 311 abuts against the bottom of the lower mounting part 12, continue to rotate the main adjustment screw 311 to drive the left page box 10 to adjust its position upwards slightly. After determining the position, tighten the adjustment bolt 13.
[0033] The main adjusting screw 311 rests against the bottom of the lower mounting part 12, which can support the left page box 10 as a whole and limit its movement, preventing the left page box 10 from moving downward under the weight of the door panel, ensuring the normal use of the door and improving the overall performance of the door.
[0034] Preferably, the main adjusting block 31 is provided with two first set screws 312, and the first set screws 312 are partially embedded inside the door frame. Preferably, the main adjusting block 31 is fixedly connected to the door frame by the first set screws 312 to ensure a stable connection and facilitate the normal use of the main adjusting screw 311.
[0035] Furthermore, the main adjusting screw 311 is located between the two first set screws 312. Preferably, the main adjusting screw 311 is located between the two first set screws 312, which helps to maintain the overall stability of the main adjusting block 31 and ensures that the structure is in a stable state when the main adjusting screw 311 is rotated.
[0036] Preferably, such as Figures 4 to 5 As shown, a secondary adjustment block 32 is provided above the upper mounting part 11. A secondary adjustment screw 321 is passed through the secondary adjustment block 32 in the vertical direction, and the bottom of the secondary adjustment screw 321 can be close to or away from the upper mounting part 11.
[0037] In this embodiment, a secondary adjustment block 32 with the same structure as the main adjustment block 31 is preferably provided above the upper mounting part 11. At the same time, a secondary adjustment screw 321 is passed through the secondary adjustment block 32. The arrangement of the secondary adjustment block 32 and the secondary adjustment screw 321 facilitates the fine adjustment of the position of the left page box 10 above the left page box 10. After rotating the secondary adjustment screw 321 close to the upper mounting part 11, continue to rotate the secondary adjustment screw 321 to drive the left page box 10 to adjust its position downwards. After determining the position, tighten the adjustment bolt 13.
[0038] After adjustment, the auxiliary adjusting screw 321 can be disengaged from the upper mounting part 11 or remain in contact with the upper mounting part 11. When the auxiliary adjusting screw 321 abuts against the upper mounting part 11, it can cooperate with the main adjusting screw 311 to restrict the left page box 10 to a certain position, further ensuring a good connection between the door and the door frame, which is beneficial for the long-term use of the door.
[0039] Furthermore, two second set screws 322, which are fixed to the door frame, are horizontally inserted on the secondary adjustment block 32, and the secondary adjustment screw 321 is located between the two second set screws 322.
[0040] The main and auxiliary adjusting blocks 32 are fixedly connected to the door frame by the second set screw 322 to ensure stable connection and facilitate normal use of the auxiliary adjusting screw 321. At the same time, the auxiliary adjusting screw 321 is located between the two second set screws 322, which helps to maintain the overall stability of the auxiliary adjusting block 32 and ensures that the structure is in a stable state when the auxiliary adjusting screw 321 is rotated.
[0041] This hinge features a well-designed limit adjustment structure. Through the coordinated arrangement of the main adjusting block 31 and the main adjusting screw 311, the vertical position of the left leaf box 10 can be finely adjusted, facilitating installation and subsequent maintenance. Simultaneously, the main adjusting screw 311 supports and limits the left leaf box 10, preventing it from shifting downwards under the weight of the door panel and ensuring normal door operation. Furthermore, the auxiliary adjusting block 32 and auxiliary adjusting screw 321, working in conjunction with the main adjusting block 31 and the main adjusting screw 311, further limit and adjust the position of the left leaf box 10, improving the overall performance of the hinge.
[0042] The embodiments described herein are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or additions to the specific embodiments described, or substitutions made by those skilled in the art, should be covered within the scope of protection of the present invention.
Claims
1. A limit adjustment structure for a hinge, characterized in that, include: The left page box is embedded in the door frame. The upper and lower ends of the left page box extend outward to form an upper mounting part and a lower mounting part, respectively. Each mounting part has two adjustment holes, and an adjustment bolt is inserted through each adjustment hole. The right page box is embedded in the door panel. The upper and lower ends of the right page box extend outward to form an upper connecting part and a lower connecting part, and two fixing bolts are inserted through each connecting part. The main adjustment block is located below the lower mounting part and connected to the door frame. At least one main adjustment screw is inserted through the main adjustment block in the vertical direction, and the top of the main adjustment screw abuts against the lower mounting part.
2. The hinge limit adjustment structure according to claim 1, characterized in that, Two first set screws are mounted on the main adjustment block, and the first set screws are partially embedded inside the door frame.
3. The hinge limit adjustment structure according to claim 2, characterized in that, The main adjusting screw is located between the two first set screws.
4. The hinge limit adjustment structure according to claim 1, characterized in that, A secondary adjustment block is provided above the upper mounting part, and a secondary adjustment screw is passed through the upper mounting part along the vertical direction. The bottom of the secondary adjustment screw can be close to or away from the upper mounting part.
5. The hinge limit adjustment structure according to claim 4, characterized in that, Two second set screws, which are fixed to the door frame, are horizontally inserted on the secondary adjustment block, and the secondary adjustment screw is located between the two second set screws.