A reinforced assembly buffer door shaft device with resistance and rebound function
By designing limit components, door hinge components, and reinforcing components, the problems of jamming, unstable connection, and insufficient structural strength of existing door hinge devices have been solved, achieving smooth opening and closing of the door panel and stability of the buffer function, and improving the service life and safety of the door hinge device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- WUHAN RUIJIE DOOR IND CO LTD
- Filing Date
- 2026-04-16
- Publication Date
- 2026-06-16
AI Technical Summary
Existing reinforced assembly buffer door hinge devices with obstacle detection and rebound function lack a stable obstacle detection and rebound structure during use, which easily leads to jamming or incomplete rebound. Furthermore, the connection is unstable, resulting in rigid collision between the door body and the door frame. The structure is not strong enough, and assembly and maintenance are inconvenient. It cannot adapt to hollow metal door panels of different specifications.
A structure including a limiting component, a door hinge component, a reinforcing component, and a docking component is designed. The limiting shaft block and the rotating groove provide rotational support, the connecting ring provides a force support point for the buffer rebound structure, the door hinge block and the buffer rod cooperate to achieve obstacle detection and buffering, the U-shaped reinforcing plate is fixed in the top of the plate to disperse stress, the limiting groove and the T-shaped block limit displacement, and the limiting bolt achieves rigid linkage.
It enables smooth opening and closing of the door panel, avoids rigid collisions, extends service life, improves structural strength and impact resistance, adapts to hollow metal door panels of different specifications, and ensures the stability and safety of the buffer function.
Smart Images
Figure CN122215596A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of door hinge technology, and in particular to a reinforced assembly buffer door hinge device with an obstacle detection and rebound function. Background Technology
[0002] With the continuous development of building decoration and door and window hardware technology, door hinge devices, as the core connecting parts of the door opening and closing structure, are widely used in various scenarios such as residential houses, commercial places, industrial plants and public buildings. Their structural stability, buffer performance and service life directly affect the user experience and safety of the door.
[0003] The door hinge device is a key component for achieving smooth door rotation and reducing opening and closing impact. Its core function is to ensure smooth door opening and closing, reduce collision noise, and extend the service life of the door and door frame. In scenarios with high traffic, high opening and closing frequency, or high safety requirements, a door hinge structure with buffering and rebound functions is needed to reduce door impact damage and safety hazards.
[0004] However, existing reinforced assembly buffer door hinge devices with obstacle detection and rebound function mostly lack a stable obstacle detection and rebound structure in actual use. The buffer action is prone to jamming or incomplete rebound, which cannot effectively prevent rigid collisions between the door and the door frame. At the same time, the connection between the door hinge and the door panel is mostly simple fixing without reinforcement and limiting structure. After long-term use, the hinge is prone to loosening and displacement, and the stress area at the top of the door panel is prone to deformation and cracking. The overall structural strength and impact resistance are insufficient. In addition, existing buffer door hinges are mostly one-piece structures, which are inconvenient to assemble and maintain, have poor versatility, and cannot be adapted to hollow metal door panels of different specifications. Moreover, the buffer components lack reliable support and stress fulcrum, resulting in poor stability of the buffer function and making it difficult to meet the requirements of long-term high-frequency opening and closing of the door.
[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Summary of the Invention
[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a reinforced assembly buffer door hinge device with an obstacle detection and rebound function.
[0007] To achieve the above objectives, the present invention adopts the following technical solution: A reinforced assembly buffer door hinge device with obstacle detection and rebound function includes a door frame, a limit component is provided on the top side of the door frame, a door panel is provided on the inner side of the door frame, a door hinge assembly is provided on the top side of the door panel and the door hinge assembly cooperates with the limit component, and a reinforcement component and a docking component are provided on the top inner side of the door panel and the docking component cooperates with the door hinge assembly.
[0008] As a further description of the above technical solution: the limiting component includes an assembly top plate disposed on the top of the door frame, a limiting shaft block disposed at the bottom of the assembly top plate, a rotating groove disposed in the middle of the limiting shaft block, and the rotating groove being connected to the door hinge assembly, a connecting ring disposed on one side of the limiting shaft block, and the connecting ring cooperating with the door hinge assembly. By setting the assembly top plate, the limiting component is stably assembled with the top of the door frame. The limiting shaft block and the rotating groove provide rotational support and axial positioning for the door hinge assembly, preventing the door hinge assembly from shifting during rotation. The connecting ring is used to connect the buffer elastic component, providing a force support point for the resistance rebound and buffer action.
[0009] As a further description of the above technical solution: the door panel includes a plate body disposed inside the door frame. A mounting groove is provided at one top corner of the plate body, and the mounting groove cooperates with the door hinge assembly. A docking groove is provided on one side of the mounting groove and at one end of the plate body. A plurality of docking holes are provided inside the docking groove, and the docking holes are connected to the door hinge assembly. A plurality of assembly holes are provided on the inner top of the plate body, and the assembly holes are connected to the reinforcing components. The plate body is made of metal and has a hollow structure. The mounting groove provides embedded installation space for the door hinge assembly, improving the flatness of the assembly. The docking groove and docking holes enable precise docking and positioning of the door hinge assembly and the plate body. The hollow structure reduces the overall weight while ensuring the structural strength of the plate body. The assembly holes provide an installation base for the reinforcing components, improving the load-bearing capacity of the top of the door panel.
[0010] As a further description of the above technical solution: the door hinge assembly includes a door hinge block disposed on one side of the plate. A T-shaped block is disposed at one end of the door hinge block, and the T-shaped block mates with a mounting groove. A plurality of fastening holes are formed on one side of the T-shaped block, and these fastening holes are connected to a docking assembly. A rotating hole is formed at the center of the top of the door hinge block, and a rotating rod is disposed inside the rotating hole and connected to a rotating groove. An auxiliary groove is formed on one side of the door hinge block, and a support assembly is disposed inside the auxiliary groove. The support assembly includes an auxiliary block disposed inside the auxiliary groove. A docking plate is disposed at the end of the auxiliary block away from the door hinge block, and a support block is disposed in the middle of the docking plate. The system includes an elastic hole with a buffer rod inside. Several support holes are located on one side of the mating plate, and these holes are connected to the mating holes by limiting bolts. A buffer spring connects the connecting ring and the buffer rod. A T-shaped block and mounting groove are used to prevent the door hinge block from detaching from the plate. A rotating rod and rotating groove allow the door panel to rotate smoothly around its axis. The support assembly provides stable support for the buffer and rebound structure. The buffer rod and buffer spring work together to generate elastic deformation and provide a restoring force when the door panel encounters resistance, achieving resistance buffering and automatic rebound, preventing rigid collisions between the door panel and the door frame. The limiting bolts ensure a firm connection between the support assembly and the plate, improving the stability of the buffering action.
[0011] As a further description of the above technical solution: the reinforcing component includes a reinforcing plate disposed inside the plate body. The reinforcing plate has several mounting holes on both sides, and the mounting holes and assembly holes are connected by mounting bolts. The reinforcing plate has several connecting holes in the middle. The reinforcing plate is fixed to the top of the plate body by setting mounting bolts, which makes up for the local strength deficiency of the hollow structure of the plate body, and disperses the stress generated during the rotation and buffering of the door hinge assembly, preventing the top of the plate body from deforming or cracking due to repeated stress. The connecting holes are used to realize the integrated connection between the reinforcing component and the docking component, and improve the overall integrity and load-bearing capacity of the overall structure.
[0012] As a further description of the above technical solution: the docking assembly includes a limiting plate disposed inside the plate body. A limiting groove is formed on one side of the limiting plate, and the limiting groove cooperates with a T-shaped block. Several limiting holes are formed on the other side of the limiting plate, and the limiting holes are connected to the connecting holes by limiting bolts. The reinforcing plate has a U-shaped structure and is made of metal. The fastening holes, limiting holes, and connecting holes are connected by limiting bolts. By setting the limiting groove and cooperating with the T-shaped block, the lateral and longitudinal displacement of the door hinge assembly is further restricted, avoiding loosening and displacement during use. The U-shaped reinforcing plate wraps around the stress area supporting the door hinge assembly, enhancing the local impact resistance. The fastening holes, limiting holes, and connecting holes are connected in series and fixed by the same limiting bolt, realizing the rigid linkage of the door hinge assembly, docking assembly, and reinforcing assembly, improving the structural strength and service life of the door hinge installation part, and ensuring the long-term stable and reliable resistance to impact and buffering.
[0013] The present invention has the following beneficial effects: 1. The reinforced assembly buffer door hinge device with obstacle detection and rebound function designed in this invention achieves stable assembly of the door hinge assembly with the door frame through the assembly top plate of the limiting component. The limiting shaft block and the rotating groove provide reliable rotational support and axial positioning for the door hinge assembly, preventing the door hinge from rotating off-center. The connecting ring provides a stable force support point for the buffer rebound structure. The rotating rod and rotating groove of the door hinge assembly cooperate to achieve smooth opening and closing of the door panel. The buffer rod and buffer spring work together to generate elastic deformation and provide a reset force when the door panel encounters resistance, realizing obstacle detection buffering and automatic rebound. This avoids rigid collision between the door panel and the door frame, which would cause structural damage. At the same time, the door panel adopts a hollow metal plate body, which reduces its own weight while ensuring structural strength. The mounting groove and docking groove realize the embedded and precise assembly of the door hinge assembly, improve the overall assembly flatness and usage stability, and meet the needs of frequent opening and closing of the door.
[0014] 2. The reinforced assembly buffer door hinge device with obstacle detection and rebound function designed in this invention uses a U-shaped metal reinforcing plate fixed to the top of the plate body to compensate for the insufficient local strength of the hollow plate body, disperse the concentrated stress during the rotation and buffering process of the door hinge, and prevent the top of the plate body from deforming or cracking under stress. The limiting groove of the docking component and the T-shaped block cooperate to further limit the displacement of the door hinge component, avoiding loosening and displacement after long-term use. At the same time, the door hinge component, docking component and reinforcing component are rigidly linked in series by the limiting bolts, which improves the overall structural strength and impact resistance of the door hinge installation part. The support component and the plate body are firmly connected by the limiting bolts to ensure that the buffering and rebound action is continuous, stable and reliable, extend the overall service life of the door hinge device, and improve the safety and durability of the door body during use. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a three-dimensional structural diagram of the overall structure of the present invention; Figure 4 This is a cross-sectional view of the limiting component structure in this invention; Figure 5 This is a schematic diagram of a partial structure of the door panel in this invention; Figure 6 This is a cross-sectional view of the door panel structure in this invention; Figure 7 This is one of the three-dimensional structural diagrams of the door hinge assembly in this invention; Figure 8 This is the second schematic diagram of the three-dimensional structure of the door hinge assembly in this invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the reinforcing component in this invention; Figure 10 This is a schematic diagram of the three-dimensional structure of the docking component in this invention.
[0016] Legend: 1. Door frame; 2. Limiting assembly; 21. Assembled top plate; 22. Limiting shaft block; 23. Rotating groove; 24. Connecting ring; 3. Door panel; 31. Panel body; 32. Mounting groove; 33. Docking groove; 34. Docking hole; 35. Assembly hole; 4. Door hinge assembly; 41. Door hinge block; 42. T-block; 43. Fastening hole; 44. Rotating hole; 45. Rotating rod; 46. Auxiliary groove; 47. Support assembly; 471. Auxiliary block; 472. Docking plate; 473. Support block; 474. Elastic hole; 475. Buffer rod; 476. Support hole; 477. Limiting bolt; 5. Reinforcing assembly; 51. Reinforcing plate; 52. Mounting hole; 53. Mounting bolt; 54. Connecting hole; 6. Docking assembly; 61. Limiting plate; 62. Limiting groove; 63. Limiting hole; 64. Limiting bolt. Detailed Implementation
[0017] Reference Figures 1 to 10 The present invention provides a reinforced assembly buffer door hinge device with obstacle detection and rebound function, comprising a door frame 1, a limiting component 2 provided on the top side of the door frame 1, a door panel 3 provided on the inner side of the door frame 1, a door hinge assembly 4 provided on the top side of the door panel 3, and the door hinge assembly 4 cooperating with the limiting component 2, and a reinforcing component 5 and a docking component 6 provided on the top inner side of the door panel 3, and the docking component 6 cooperating with the door hinge assembly 4.
[0018] As a further implementation of the above technical solution: the limiting component 2 includes an assembly top plate 21 set on the top of the door frame 1. The bottom of the assembly top plate 21 is provided with a limiting shaft block 22. The middle of the limiting shaft block 22 is provided with a rotating groove 23, and the rotating groove 23 is connected to the door hinge assembly 4. A connecting ring 24 is provided on one side of the limiting shaft block 22, and the connecting ring 24 cooperates with the door hinge assembly 4. In use, the assembly top plate 21 is fixedly connected to the top of the door frame 1 by bolts. It is made of galvanized steel sheet stamping with a thickness of 2.5mm to ensure the overall connection strength. The limiting shaft block 22 is an integral cast steel structure, which is fully welded to the assembly top plate 21. The inner diameter of the rotating groove 23 is clearance-fitted with the outer diameter of the rotating rod 45, and the fit tolerance is ≤0.1mm to ensure smooth rotation without jamming. At the same time, the connecting ring 24 is a stainless steel ring structure, and the inner diameter is adapted to the outer diameter of the end of the buffer spring, providing a stable force support point for the buffer rebound action and avoiding the buffer spring from being deflected by force.
[0019] As a further implementation of the above technical solution: the door panel 3 includes a panel 31 disposed inside the door frame 1. A mounting groove 32 is provided at one top corner of the panel 31, and the mounting groove 32 cooperates with the door hinge assembly 4. A mating groove 33 is provided on one side of the mounting groove 32 and at one end of the panel 31. A plurality of mating holes 34 are provided inside the mating groove 33, and the mating holes 34 are connected to the door hinge assembly 4. A plurality of assembly holes 35 are provided at the inner top of the panel 31, and the assembly holes 35 are connected to the reinforcing assembly 5. The plate 31 is made of metal and has a hollow structure. The plate 31 is made of cold-rolled steel plate with a panel thickness of 1.2mm and a hollow cavity height of 80mm. This reduces the overall weight while ensuring structural strength. The mounting groove 32 is 25mm deep and fits the shape of the T-block 42 to achieve embedded assembly. The mating groove 33 is 15mm deep and the mating hole 34 is an M6 threaded hole with evenly distributed spacing to ensure balanced force on the support component 47. The assembly hole 35 is a countersunk hole structure, which facilitates the concealed fixing of the bolt 53 and avoids protrusion interference.
[0020] As a further implementation of the above technical solution: the door hinge assembly 4 includes a door hinge block 41 disposed on one side of the plate 31. A T-shaped block 42 is disposed at one end of the door hinge block 41, and the T-shaped block 42 cooperates with the mounting groove 32. A plurality of fastening holes 43 are opened on one side of the T-shaped block 42, and the fastening holes 43 are connected to the docking assembly 6. A rotating hole 44 is opened at the center of the top of the door hinge block 41. A rotating rod 45 is disposed inside the rotating hole 44 and connects to the rotating groove 23. An auxiliary groove 46 is opened on one side of the door hinge block 41. A support assembly 47 is disposed inside the auxiliary groove 46. The support assembly 47 includes an auxiliary block 471 disposed inside the auxiliary groove 46. A docking plate 472 is disposed at the end of the auxiliary block 471 away from the door hinge block 41. A support block 473 is disposed in the middle of the docking plate 472. An elastic hole 474 is opened in the middle of the support block 473. A buffer rod 47 is disposed inside the elastic hole 474. 5. A plurality of support holes 476 are provided on one side of the docking plate 472, and the support holes 476 are connected to the docking holes 34 by limiting bolts 477. A buffer spring is provided between the connecting ring 24 and the buffer rod 475. In use, the door hinge block 41 and the T-shaped block 42 are integral forged structures made of No. 45 steel with surface quenching treatment, hardness HRC35-40, wear-resistant and deformation-resistant. The rotating rod 45 is a stainless steel optical shaft with a surface roughness Ra≤0.8μm, which is interference-fitted with the rotating hole 44 to realize the smooth rotation of the door panel 3 around the axis. The auxiliary block 471 is transitionally fitted with the auxiliary groove 46 to prevent the support component 47 from shaking. The support block 473 is a thickened steel plate structure. The elastic hole 474 is slidingly fitted with the buffer rod 475. The buffer rod 475 has a stroke of 15mm and works with the buffer spring to realize elastic buffering and automatic reset when encountering resistance. The limiting bolt 477 is an internal hexagonal stainless steel bolt to firmly lock the docking plate 472 and the plate body 31 to ensure the overall stability of the buffer structure.
[0021] As a further implementation of the above technical solution: the reinforcing component 5 includes a reinforcing plate 51 disposed inside the plate 31. The reinforcing plate 51 has several mounting holes 52 on both sides, and the mounting holes 52 are connected to the assembly holes 35 by mounting bolts 53. The reinforcing plate 51 has several connecting holes 54 in the middle. When in use, the reinforcing plate 51 is made of high-strength steel plate with a thickness of 3mm. It is fastened to the top of the plate 31 by mounting bolts 53 to make up for the local strength deficiency of the hollow plate. The mounting holes 52 are waist-shaped holes, which are convenient for fine adjustment of the assembly position. The connecting holes 54 are concentric threaded holes, which are precisely aligned with the docking component 6, connecting the reinforcing structure and the door hinge fixing structure into a whole, dispersing the concentrated stress during the rotation and buffering process of the door hinge, and preventing the top of the plate 31 from being repeatedly deformed and cracked by stress.
[0022] As a further implementation of the above technical solution: the docking assembly 6 includes a limiting plate 61 disposed inside the plate 31. A limiting groove 62 is provided on one side of the limiting plate 61, and the limiting groove 62 cooperates with the T-shaped block 42. A plurality of limiting holes 63 are provided on the other side of the limiting plate 61, and the limiting holes 63 are connected to the connecting holes 54 by limiting bolts 64. The reinforcing plate 51 has a U-shaped structure and is made of metal. The fastening holes 43, limiting holes 63 and connecting holes 54 are connected by limiting bolts 64. In use, the limiting plate 61 is a thickened steel plate structure. The limiting groove 62 fits against the side of the T-shaped block 42 to limit the lateral and longitudinal displacement of the door hinge assembly 4. The U-shaped reinforcing plate 51 wraps around the stress area of the door hinge, further improving the local impact resistance. The same limiting bolt 64 passes through the fastening holes 43, limiting holes 63 and connecting holes 54 in sequence to realize the rigid linkage of the door hinge assembly 4, the docking assembly 6 and the reinforcing assembly 5.
[0023] Working principle: When using this invention, the door frame 1 and door panel 3 are used as the overall installation base. The limiting component 2 is fixed to the top of the door frame 1 through the assembly top plate 21, providing upper rotation support and axial positioning for the door hinge assembly 4. During the opening and closing process of the door panel 3, the door hinge block 41 rotates circumferentially along the rotation groove 23 of the limiting shaft block 22 through the rotating rod 45. With the cooperation of the precision clearance fit structure, it is ensured that the door panel 3 rotates smoothly without jamming or radial movement. When the door panel 3 is closed normally or is impacted by external force or unexpectedly obstructed, the door panel 3 drives the door hinge block 41 to deflect at a certain angle. The auxiliary block 471 on one side of the door hinge block 41 pushes the support block 473 simultaneously, causing the buffer rod 475 to generate axial displacement in the elastic hole 474, thereby compressing the buffer spring connected between the connecting ring 24 and the buffer rod 475. The impact energy is absorbed by the elastic deformation of the buffer spring, realizing the obstruction buffer and avoiding rigid collision between the door panel 3 and the door frame 1.
[0024] After the external force disappears or the obstruction is removed, the buffer spring resets using its own elastic potential energy, pushing the buffer rod 475 back to its original position. This, in turn, causes the door hinge block 41 and the door panel 3 to return to their normal rotation posture, completing the automatic rebound action and allowing the door panel 3 to return to its original position smoothly. During this process, the T-shaped block 42 of the door hinge assembly 4 is embedded in the mounting groove 32 of the plate 31 and closely cooperates with the limiting groove 62 of the docking assembly 6, limiting the displacement of the door hinge assembly 4 in the lateral and longitudinal directions to prevent loosening or displacement due to long-term high-frequency opening and closing. The U-shaped reinforcing plate 51 of the reinforcing assembly 5 is fixed to the top of the plate 31 by the mounting bolt 53, compensating for the local weak points of the hollow plate and evenly dispersing the concentrated stress generated by the rotation of the door hinge and the buffer rebound, preventing the top of the plate 31 from deforming and cracking under stress. The same limiting bolt 64 passes through the fastening hole 43, the limiting hole 63 and the connecting hole 54 in sequence, rigidly connecting the door hinge assembly 4, the docking assembly 6 and the reinforcing assembly 5 into one unit.
[0025] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A reinforced assembly buffer door hinge device with obstacle detection and rebound function, characterized in that, The device includes a door frame (1), a limiting component (2) is provided on one side of the top of the door frame (1), a door panel (3) is provided on the inner side of the door frame (1), a door hinge component (4) is provided on one side of the top of the door panel (3), and the door hinge component (4) cooperates with the limiting component (2). A reinforcing component (5) and a docking component (6) are provided on the top inner side of the door panel (3), and the docking component (6) cooperates with the door hinge component (4).
2. The reinforced assembly buffer door hinge device with obstacle detection and rebound function according to claim 1, characterized in that: The limiting component (2) includes an assembly top plate (21) set on the top of the door frame (1). The bottom of the assembly top plate (21) is provided with a limiting shaft block (22). A rotating groove (23) is opened in the middle of the limiting shaft block (22), and the rotating groove (23) is connected to the door hinge assembly (4). A connecting ring (24) is provided on one side of the limiting shaft block (22), and the connecting ring (24) cooperates with the door hinge assembly (4).
3. A reinforced assembly buffer door hinge device with obstacle detection and rebound function according to claim 2, characterized in that: The door panel (3) includes a panel (31) disposed inside the door frame (1). A mounting groove (32) is provided at one corner of the top of the panel (31), and the mounting groove (32) cooperates with the door hinge assembly (4). A docking groove (33) is provided on one side of the mounting groove (32) and at one end of the panel (31). A plurality of docking holes (34) are provided inside the docking groove (33), and the docking holes (34) are connected to the door hinge assembly (4). A plurality of assembly holes (35) are provided on the inner top of the panel (31), and the assembly holes (35) are connected to the reinforcing component (5).
4. A reinforced assembly buffer door hinge device with obstacle detection and rebound function according to claim 3, characterized in that: The door hinge assembly (4) includes a door hinge block (41) disposed on one side of the plate (31), a T-shaped block (42) is provided at one end of the door hinge block (41), and the T-shaped block (42) cooperates with the mounting groove (32). A plurality of fastening holes (43) are provided on one side of the T-shaped block (42), and the fastening holes (43) are connected to the docking assembly (6). The top center of the door hinge block (41) is provided with a rotating hole (44), and a rotating rod (45) is provided on the inner side of the rotating hole (44) to connect with the rotating groove (23). An auxiliary groove (46) is provided on one side of the door hinge block (41), and a support component (47) is provided inside the auxiliary groove (46).
5. A reinforced assembly buffer door hinge device with obstacle detection and rebound function according to claim 4, characterized in that: The support assembly (47) includes an auxiliary block (471) disposed inside the auxiliary groove (46). A docking plate (472) is provided at one end of the auxiliary block (471) away from the door hinge block (41). A support block (473) is provided in the middle of the docking plate (472). An elastic hole (474) is provided in the middle of the support block (473). A buffer rod (475) is provided inside the elastic hole (474). A plurality of support holes (476) are provided on one side of the docking plate (472), and the support holes (476) are connected to the docking holes (34) by limiting bolts (477).
6. A reinforced assembly buffer door hinge device with obstacle detection and rebound function according to claim 4, characterized in that: The reinforcing component (5) includes a reinforcing plate (51) disposed inside the plate body (31). The reinforcing plate (51) has several mounting holes (52) on both sides, and the mounting holes (52) are connected to the assembly holes (35) by mounting bolts (53). The reinforcing plate (51) has several connecting holes (54) in the middle.
7. A reinforced assembly buffer door hinge device with obstacle detection and rebound function according to claim 6, characterized in that: The docking assembly (6) includes a limiting plate (61) disposed inside the plate body (31). A limiting groove (62) is provided on one side of the limiting plate (61), and the limiting groove (62) cooperates with the T-block (42). A plurality of limiting holes (63) are provided on the other side of the limiting plate (61), and the limiting holes (63) are connected to the connecting holes (54) by limiting bolts (64).
8. A reinforced assembly buffer door hinge device with obstacle detection and rebound function according to claim 4, characterized in that: The reinforcing plate (51) has a U-shaped structure and is made of metal. The fastening hole (43), the limiting hole (63) and the connecting hole (54) are connected by the limiting bolt (64).
9. A reinforced assembly buffer door hinge device with obstacle detection and rebound function according to claim 5, characterized in that: A buffer spring is provided between the connecting ring (24) and the buffer rod (475).
10. A reinforced assembly buffer door hinge device with obstacle detection and rebound function according to claim 3, characterized in that: The plate (31) is made of metal and has a hollow structure.