A concealed door pivot structure and a method of installing the same
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 重庆集凯科技服务有限公司
- Filing Date
- 2023-09-27
- Publication Date
- 2026-07-24
Smart Images
Figure CN117365215B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of architectural decoration technology, and more specifically, to a hidden door hinge structure and its installation method. Background Technology
[0002] Concealed doors are a popular interior design technique that can enhance the visual appeal of a space. The key to a concealed door is its invisibility; it hides the door within the decor, hence the name "hidden door." A concealed door design not only hides the door itself but also the space, serving as a finishing touch to the overall interior design.
[0003] Concealed door hinges are mechanical devices used to connect the door frame and the door leaf, allowing relative rotation between them. These hinges are not easily visible during use. However, because concealed door hinges are often welded onto the steel frame on-site, the installation process is complex and requires high precision, thus heavily relying on the installer's skill. Installers need to repeatedly adjust the hinges during installation, ensuring the door leaf and frame are on the same plane, minimizing the gap between them, and precisely controlling the distance of the installed door leaf from the ground. If the precision requirements are not met, the hinges must be remade, resulting in high steel consumption and manufacturing costs. Furthermore, welded concealed door hinges typically do not meet the fire safety requirement of a 120° opening angle, are prone to deformation, and have a poor aesthetic appearance. Summary of the Invention
[0004] The purpose of this invention is to provide a concealed door hinge structure and its installation method, in order to solve the technical problems in the prior art where concealed door hinges are mostly welded on-site to a steel frame, which involves complex installation processes, high installation precision requirements, and difficulty in accurately controlling whether the door leaf and door frame are on the same plane, whether the gap between the door leaf and door frame is minimized, and the distance of the door leaf from the ground after installation.
[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:
[0006] On one hand, the present invention provides a concealed door hinge structure, characterized in that it includes: a first bracket, a second bracket, and a three-dimensional adjustment mechanism connecting the first bracket and the second bracket. The first bracket is fixed to the wall, and the second bracket is fixed to the door leaf. The three-dimensional adjustment mechanism includes a base, a movable adjustment box, and an adjustment shaft assembly. One end of the adjustment shaft assembly is fixed to the movable adjustment box, and the movable adjustment box is detachably connected to the base via an adjustment bolt assembly. The adjustment bolt assembly passes through an adjustment elongated hole provided in the movable adjustment box and is connected to the movable adjustment box. The other end of the adjustment shaft assembly is fixed to the first bracket, and the base is fixed to the second bracket. The adjustment bolt assembly includes an adjustment bolt and an eccentric limiting block. The eccentric limiting block includes an upper end, a through hole, and a lower end of a counterweight. An expansion joint is provided at the upper end, and the expansion joint extends to the through hole. When the first bracket, the second bracket, and the three-dimensional adjustment mechanism are in the adjusted state, the center line of the eccentric limiting block is perpendicular to the center line of the adjustment elongated hole, so that the position of the adjustment bolt assembly and the movable adjustment box is relatively fixed.
[0007] In one possible implementation, the movable adjustment box is a rectangular hollow box with one side open, and the adjustment elongated hole is a straight elongated hole; wherein, the adjustment elongated hole includes: a first adjustment hole and a second adjustment hole, the first adjustment hole and the second adjustment hole are respectively arranged on two adjacent sides of the movable adjustment box, and the center lines of the first adjustment hole and the second adjustment hole are on different horizontal planes.
[0008] In one possible implementation, at least one first adjusting fixing block and at least one second adjusting fixing block are fixedly disposed on the base, and the at least one first adjusting fixing block and at least one second adjusting fixing block are used to fix the movable adjusting box; wherein, both the first adjusting fixing block and the second adjusting fixing block are provided with a first threaded hole, and the first threaded hole matches the adjusting bolt.
[0009] In one possible implementation, the center of the first threaded hole on the first adjusting fixing block is located on the center line of the first adjusting fixing block; the center of the first threaded hole on the second adjusting fixing block is located on the center line of the second adjusting fixing block.
[0010] In one possible implementation, there are at least two first adjusting fixing blocks, wherein the two first adjusting fixing blocks are parallel to each other, and the centers of the first threaded holes respectively provided on the two first adjusting fixing blocks are on the same straight line; there are at least two second adjusting fixing blocks, wherein the two second adjusting fixing blocks are parallel to each other, and the centers of the first threaded holes respectively provided on the two second adjusting fixing blocks are on the same straight line.
[0011] In one possible implementation, both the first adjusting fixing block and the second adjusting fixing block are rectangular plates. The centers of the first threaded hole on the first adjusting fixing block and the first threaded hole on the second adjusting fixing block are located on different planes, and the extensions of the first threaded hole on the first adjusting fixing block and the first threaded hole on the second adjusting fixing block do not interfere with each other.
[0012] In one possible implementation, the adjusting bolt includes a nut, a connecting rod, and a threaded rod, which are sequentially fixedly connected. The connecting rod is a cylinder, and two limiting rings are provided on the connecting rod. The two limiting rings are arranged in parallel and are perpendicular to the center line of the connecting rod. A limiting groove is formed between the two limiting rings, which is used to fix the eccentric limiting block.
[0013] In one possible implementation, the adjusting shaft assembly includes a rotating shaft sleeve, a threaded column, a nut, and a base. One end of the threaded column is fixedly connected to the base, and the other end is inserted into the rotating shaft sleeve. The nut is movably connected to the threaded column. The inner diameter of the rotating shaft sleeve is larger than the outer diameter of the threaded column, and the outer diameter of the rotating shaft sleeve is smaller than the outer diameter of the nut.
[0014] In one possible implementation, the base is fixedly connected to the second bracket, and one end of the rotating shaft sleeve is fixedly connected to the first bracket.
[0015] On the other hand, a method for installing a concealed door hinge structure is provided, applied to the concealed door hinge structure described above, the method comprising:
[0016] The rotating shaft sleeve of the three-dimensional adjustment mechanism is welded and fixed to the first bracket;
[0017] The movable adjustment box is connected to the base via an adjustment bolt assembly;
[0018] The base of the adjusting shaft assembly is welded and fixed to the movable adjusting box;
[0019] Insert the threaded post of the adjusting shaft assembly into the rotating shaft sleeve;
[0020] Secure the base to the second bracket using self-tapping screws;
[0021] The spatial installation position of the concealed door can be adjusted by rotating the adjusting bolt and the nut of the adjusting shaft assembly.
[0022] The beneficial effects of the concealed door pivot structure and its installation method provided by this invention are at least as follows: the invention has a simple structure and is easy to construct. The spatial installation position of the concealed door can be adjusted by adjusting the bolt assembly and the pivot assembly. It has low dependence on the operator's skill level. The adjustment of the three-dimensional adjustment mechanism can accurately control the gap between the door leaf and the door frame, as well as the flatness of the door leaf and the door frame. It has a good decorative effect and low manufacturing cost. In addition, the concealed door pivot structure provided by this application can effectively solve the problem of insufficient opening angle of the concealed door and meet fire protection requirements. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of a hidden door hinge structure provided in an embodiment of the present invention;
[0025] Figure 2 This is a schematic diagram of the assembly structure of the three-dimensional adjustment mechanism and the second support in an embodiment of the present invention;
[0026] Figure 3 This is a schematic diagram of the assembly structure of the rotating shaft sleeve and the first bracket in an embodiment of the present invention;
[0027] Figure 4 This is a schematic diagram of the structure of the movable adjustment box in an embodiment of the present invention;
[0028] Figure 5 This is a schematic diagram of the assembly structure of the movable adjustment box and the base in an embodiment of the present invention;
[0029] Figure 6 This is a schematic diagram of the adjusting bolt assembly in an embodiment of the present invention;
[0030] Figure 7 This is a schematic diagram of the eccentric limiting block in an embodiment of the present invention;
[0031] Figure 8 This is a schematic diagram of the adjusting bolt in an embodiment of the present invention;
[0032] Figure 9 This is a schematic diagram of the first state structure of the eccentric limiting block and the adjusting elongated hole in an embodiment of the present invention;
[0033] Figure 10 This is a schematic diagram of the second state structure of the eccentric limiting block and the adjusting elongated hole in an embodiment of the present invention;
[0034] Figure 11 This is a schematic diagram showing the positional relationship between the first adjusting fixing block and the second adjusting fixing block provided on the base in an embodiment of the present invention;
[0035] Figure 12 This is a schematic diagram of the installation method of a concealed door hinge structure provided in an embodiment of the present invention.
[0036] The following are the labeling elements in the figure:
[0037] 10. First support; 20. Three-dimensional adjustment mechanism; 30. Second support; 21. Base; 22. Movable adjustment box; 23. Adjusting bolt assembly; 24. Adjusting shaft assembly; 211. First adjusting fixing block; 212. Second adjusting fixing block; 213. First threaded hole; 214. Fixing hole; 221. First adjusting hole; 222. Second adjusting hole; 231. Adjusting bolt; 232. Eccentric limiting block; 241. Rotating shaft sleeve; 242. Threaded column; 243. Nut; 244. Base; 2311. Nut; 2312. Connecting rod; 2313. Threaded rod; 2314. Limiting ring; 2315. Limiting groove; 2321. Upper end; 2322. Expansion joint; 2323. Through hole; 2324. Lower end of counterweight. Detailed Implementation
[0038] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0039] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.
[0040] Figure 1 This is a schematic diagram of a concealed door hinge structure provided in an embodiment of the present invention. Figure 1As shown, this application embodiment provides a hidden door pivot structure, including: a first bracket 10, a second bracket 30, and a three-dimensional adjustment mechanism 20 connecting the first bracket 10 and the second bracket 30, wherein the first bracket 10 is fixed to the wall, the second bracket 30 is fixed to the door leaf, and the three-dimensional adjustment mechanism 20 is located between the first bracket 10 and the second bracket 30.
[0041] Typically, in this application embodiment, the bracket is installed on the top of the door leaf. In one possible embodiment, the first bracket 10 and the second bracket 30 are made of rectangular square steel. In other embodiments, other steel materials such as channel steel can also be used. This application does not make specific limitations.
[0042] The first bracket 10 is fixed to the wall, and the second bracket 30 is fixed to the door leaf. The door leaf and the wall are connected by a three-dimensional adjustment mechanism 20, which allows for adjustment of the gap width between the concealed door and the wall. This mechanism ensures that the edge of the concealed door aligns with the gap width, achieving a decorative and aesthetically pleasing effect. Furthermore, the adjustment mechanism 20 can bring the surface of the concealed door flush with the wall, enhancing the decorative effect. During the installation of the floor-to-ceiling concealed door, the three-dimensional adjustment mechanism 20 can also precisely control the distance of the concealed door from the ground.
[0043] Compared with welded hinges, the embodiments of this application have the advantages of simple structure, convenient construction, adjustable installation position of the concealed door by adjusting bolt assembly 23 and adjusting shaft assembly 24, low dependence on the operator's skill level, precise control of the gap between the door leaf and the door frame, as well as the flatness of the door leaf and the door frame, good decorative effect, low manufacturing cost, large opening angle of the concealed door, and meeting fire protection requirements.
[0044] Figure 2 This is a schematic diagram of the assembly structure of the three-dimensional adjustment mechanism and the second support in an embodiment of the present invention. Figure 3 This is a schematic diagram of the assembly structure of the rotating shaft sleeve and the first bracket in an embodiment of the present invention. Figure 2-3 As shown, the three-dimensional adjustment mechanism 20 includes a base 21, a movable adjustment box 22, and an adjustment shaft assembly 24. One end of the adjustment shaft assembly 24 is fixed to the movable adjustment box 22. The movable adjustment box 22 is detachably connected to the base 21 through an adjustment bolt assembly 23. The adjustment bolt assembly 23 passes through an adjustment elongated hole provided in the movable adjustment box 22 and is connected to the movable adjustment box 22. The other end of the adjustment shaft assembly 24 is fixed to the first bracket 10, and the base 21 is fixed to the second bracket 30.
[0045] In one possible embodiment, the adjusting shaft assembly 24 includes a rotating shaft sleeve 241, a threaded post 242, a nut 243, and a base 244. One end of the threaded post 242 is fixedly connected to the base 244, and the other end is inserted into the rotating shaft sleeve 241. The nut 243 is movably connected to the threaded post 242. The inner diameter of the rotating shaft sleeve 241 is larger than the outer diameter of the threaded post 242, and the outer diameter of the rotating shaft sleeve 241 is smaller than the outer diameter of the nut 243. The base 244 is fixedly connected to the second bracket 30, and one end of the rotating shaft sleeve 241 is fixedly connected to the first bracket 10.
[0046] The adjusting shaft assembly 24 is used to adjust the width of the vertical gap between the hidden door and the wall, and the movable adjusting box 22 is used to adjust the width of the horizontal gap between the hidden door and the wall.
[0047] When adjusting the width of the gap between the hidden door and the wall, the adjusting shaft assembly 24 can move the rotating shaft sleeve 241 up and down by rotating the nut 243 on the threaded column 242, thereby adjusting the width of the gap between the hidden door and the wall.
[0048] Figure 4 This is a schematic diagram of the structure of the movable adjustment box in an embodiment of the present invention. Figure 4 As shown, the movable adjustment box 22 can be a rectangular hollow box with one open side, and the adjustment elongated hole can be set as a straight elongated hole. The straight elongated hole can provide sufficient adjustment distance for the adjustment bolt 231 to meet the decorative requirement of consistent gap width between the concealed door and the wall.
[0049] In one example, the length direction of the adjusting elongated hole is set horizontally.
[0050] Figure 5 This is a schematic diagram of the assembly structure of the movable adjustment box and the base in an embodiment of the present invention. Figure 5 As shown, the elongated adjustment holes on the side wall of the movable adjustment housing 22 are used to adjust its relative position with the base 21. In one possible embodiment, the elongated adjustment holes may include a first adjustment hole 221 and a second adjustment hole 222. The first adjustment hole 221 and the second adjustment hole 222 are respectively located on two adjacent sides of the movable adjustment housing 22, and the center lines of the first adjustment hole 221 and the second adjustment hole 222 are on different horizontal planes. It should be noted that the projections of the first adjustment hole 221 and the second adjustment hole 222 in the spatial coordinate system do not interfere with each other, to ensure that the adjusting bolts 231 installed in the first adjustment hole 221 and the second adjustment hole 222 respectively do not interfere with each other. Since the movable adjustment housing 22 is a cube, its two adjacent sides are perpendicular. Therefore, the first adjustment hole 221 and the second adjustment hole 222 respectively located on two adjacent sides of the movable adjustment housing 22 are used to adjust the distance in two mutually perpendicular directions, that is, to adjust the displacement of the movable adjustment housing 22 in the front-back and left-right directions.
[0051] Figure 6 This is a schematic diagram of the adjusting bolt assembly in an embodiment of the present invention. Figure 7 This is a schematic diagram of the eccentric limiting block in an embodiment of the present invention. Figure 8 This is a schematic diagram of the adjusting bolt in an embodiment of the present invention. Figure 6-8 As shown, the adjusting bolt assembly 23 includes an adjusting bolt 231 and an eccentric limiting block 232. The eccentric limiting block 232 is movably connected to the adjusting bolt 231, and the eccentric limiting block 232 can rotate freely on the adjusting bolt 231.
[0052] In one possible embodiment, the adjusting bolt 231 includes a nut 2311, a connecting rod 2312, and a threaded rod 2313, which are sequentially and fixedly connected. The connecting rod 2312 is cylindrical, and two limiting rings 2314 are provided on it. The two limiting rings 2314 are parallel and perpendicular to the center line of the connecting rod 2312. A limiting groove 2315 is formed between the two limiting rings 2314, which is used to fix the eccentric limiting block 232.
[0053] The connecting rod 2312 and the two limiting rings 2314 can be integrally formed or welded together. The eccentric limiting block 232 is located within the limiting groove 2315 formed by the two limiting rings 2314.
[0054] In one possible embodiment, the eccentric limiting block 232 includes an upper end 2321, a through hole 2323, and a lower counterweight 2324. The upper end 2321 has a deformation joint 2322 extending into the through hole 2323. The lower counterweight 2324 is larger in size than the upper end 2321, and therefore has a larger area and weight. Thus, when the eccentric limiting block 232 is installed on the adjusting bolt 231, it naturally droops due to its own weight, while the upper end 2321 rests above it. The deformation joint 2322 is designed to make the eccentric limiting block 232 rotate more easily under its own weight, preventing jamming and thus preventing eccentric limiting block 232 from failing.
[0055] Figure 9 This is a schematic diagram of the first state structure of the eccentric limiting block and the adjusting elongated hole in an embodiment of the present invention. Figure 10 This is a schematic diagram of the second-state structure of the eccentric limiting block and the adjusting elongated hole in an embodiment of the present invention. Figure 9-10As shown, the width of the adjusting elongated hole is slightly wider than the width of the eccentric limiting block 232, and the length of the adjusting elongated hole is slightly longer than the length of the eccentric limiting block 232. Therefore, when the eccentric limiting block 232 is in the first state, and the eccentric limiting block 232 rotates along the connecting rod 2312 to a horizontal position (the length direction of the eccentric limiting block 232 coincides with the horizontal direction), the adjusting bolt assembly 23 can move along the length direction of the adjusting elongated hole. When the position of the adjusting bolt assembly 23 is adjusted to a suitable position, the eccentric limiting block 232 is released, allowing it to rotate to a vertical position under gravity (the length direction of the eccentric limiting block 232 is perpendicular to the horizontal direction). At this time, the eccentric limiting block 232 is in the second state, and the positions of the adjusting bolt assembly 23 and the movable adjusting box 22 are relatively fixed, thus ending the adjustment of the adjusting bolt assembly 23.
[0056] It is understandable that the adjusting bolt assemblies 23 connected to different sides of the movable adjusting box 22 are all adjusted according to the above method until the position of the movable adjusting box 22 meets the requirements.
[0057] Figure 11 This is a schematic diagram showing the positional relationship between the first adjusting fixing block and the second adjusting fixing block provided on the base in an embodiment of the present invention. Figure 11 As shown, at least one first adjusting fixing block 211 and at least one second adjusting fixing block 212 are fixedly provided on the base 21. The at least one first adjusting fixing block 211 and at least one second adjusting fixing block 212 are used to fix the movable adjusting box 22. The first adjusting fixing block 211 and the second adjusting fixing block 212 are both provided with a first threaded hole 213, which matches the adjusting bolt 231.
[0058] In one possible embodiment, the center of the first threaded hole 213 provided on the first adjusting fixing block 211 is located on the center line of the first adjusting fixing block 211; the center of the first threaded hole 213 provided on the second adjusting fixing block 212 is located on the center line of the second adjusting fixing block 212.
[0059] In one specific embodiment, there are at least two first adjusting fixing blocks 211, wherein the two first adjusting fixing blocks 211 are parallel to each other, and the centers of the first threaded holes 213 respectively provided on the two first adjusting fixing blocks 211 are on the same straight line; there are at least two second adjusting fixing blocks 212, wherein the two second adjusting fixing blocks 212 are parallel to each other, and the centers of the first threaded holes 213 respectively provided on the two second adjusting fixing blocks 212 are on the same straight line.
[0060] In this embodiment, both the two first adjusting fixing blocks 211 and the two second adjusting fixing blocks 212 are used to fix the adjusting bolt assembly 23. Using two fixing blocks can fix the adjusting bolt assembly 23 more stably.
[0061] In a more specific embodiment, both the first adjusting fixing block 211 and the second adjusting fixing block 212 are rectangular plates. The centers of the first threaded hole 213 on the first adjusting fixing block 211 and the first threaded hole 213 on the second adjusting fixing block 212 are located on different planes, and the extensions of the first threaded hole 213 on the first adjusting fixing block 211 and the first threaded hole 213 on the second adjusting fixing block 212 do not interfere with each other, so as to ensure that the adjusting bolts 231 installed on the first adjusting fixing block and the second adjusting fixing block 212 do not interfere with each other.
[0062] The base 21 has two symmetrical fixing holes 214 at both ends for fixing the base 21 to the second bracket 30. In one example, self-tapping screws can be used to fix the base 21 to the second bracket 30 at the two fixing holes 214.
[0063] In this embodiment, the installation position of the hidden door connected to it can be adjusted by the three-dimensional adjustment mechanism 20. That is, the vertical position of the hidden door can be adjusted by adjusting the adjustment shaft assembly 24, and the horizontal position of the hidden door can be adjusted by adjusting the movable adjustment box 22, so as to achieve the adjustment of the hidden door in the up-down, front-back, and left-right directions.
[0064] Figure 12 This is a schematic diagram illustrating a three-dimensional adjustable concealed door hinge installation method according to an embodiment of the present invention. Figure 12 As shown, this application also provides an installation method for a concealed door hinge structure, applied to the concealed door hinge structure described above. The installation method includes:
[0065] Step S121: Weld and fix the rotating shaft sleeve of the three-dimensional adjustment mechanism to the first bracket;
[0066] Step S122: Connect the movable adjustment box to the base via the adjustment bolt assembly;
[0067] Step S123: Weld and fix the base of the adjusting shaft assembly to the movable adjusting box.
[0068] Step S124: Insert the threaded post of the adjusting shaft assembly into the rotating shaft sleeve;
[0069] Step S125: Fix the base to the second bracket using self-tapping screws;
[0070] Step S126: Adjust the spatial installation position of the concealed door by rotating the adjusting bolt and the nut of the adjusting shaft assembly.
[0071] This application provides an installation method for a concealed door hinge structure. The process is simple, the construction is convenient, and it has low dependence on the operator's skill level. The three-dimensional adjustment mechanism can accurately control the gap between the door leaf and the door frame, as well as the flatness of the door leaf and the door frame. It has good decorative effect and low cost.
[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A hinged structure for a concealed door, characterized in that, include: A first bracket, a second bracket, and a three-dimensional adjustment mechanism connecting the first bracket and the second bracket, wherein the first bracket is fixed to the wall and the second bracket is fixed to the door leaf; The three-dimensional adjustment mechanism includes a base, a movable adjustment box, and an adjustment shaft assembly. One end of the adjustment shaft assembly is fixed to the movable adjustment box. The movable adjustment box is detachably connected to the base via an adjustment bolt assembly. The adjustment bolt assembly passes through an adjustment elongated hole provided in the movable adjustment box and is connected to the movable adjustment box. The other end of the adjustment shaft assembly is fixed to the first bracket, and the base is fixed to the second bracket. The adjusting bolt assembly includes an adjusting bolt and an eccentric limiting block. The eccentric limiting block includes an upper end, a through hole, and a lower end of a counterweight. The upper end is provided with an expansion joint, which extends to the through hole. When the first bracket, the second bracket, and the three-dimensional adjustment mechanism are in the adjusted state, the center line of the eccentric limiting block is perpendicular to the center line of the adjustment elongated hole, so that the position of the adjustment bolt assembly and the movable adjustment box is relatively fixed. The movable adjustment box is a rectangular hollow box with one side open, and the adjustment elongated hole is a straight elongated hole; The adjusting elongated hole includes a first adjusting hole and a second adjusting hole, wherein the first adjusting hole and the second adjusting hole are respectively disposed on two adjacent sides of the movable adjusting box, and the center lines of the first adjusting hole and the second adjusting hole are on different horizontal planes; At least one first adjusting fixing block and at least one second adjusting fixing block are fixedly disposed on the base, and the at least one first adjusting fixing block and at least one second adjusting fixing block are used to fix the movable adjusting box. Both the first adjusting fixing block and the second adjusting fixing block are provided with a first threaded hole, and the first threaded hole matches the adjusting bolt; The adjusting shaft assembly includes a rotating shaft sleeve, a threaded column, a nut, and a base. One end of the threaded column is fixedly connected to the base, and the other end is inserted into the rotating shaft sleeve. The nut is movably connected to the threaded column. The inner diameter of the rotating shaft sleeve is larger than the outer diameter of the threaded column, and the outer diameter of the rotating shaft sleeve is smaller than the outer diameter of the nut.
2. The hidden door hinge structure as described in claim 1, characterized in that, The center of the first threaded hole provided on the first adjusting fixing block is located on the center line of the first adjusting fixing block; The center of the first threaded hole provided on the second adjusting fixing block is located on the center line of the second adjusting fixing block.
3. The hidden door hinge structure as described in claim 2, characterized in that, The number of the at least one first adjusting fixing block is two, wherein the two first adjusting fixing blocks are parallel to each other, and the centers of the first threaded holes respectively provided on the two first adjusting fixing blocks are on the same straight line; The number of the at least one second adjusting fixing block is two, wherein the two second adjusting fixing blocks are parallel to each other, and the centers of the first threaded holes respectively provided on the two second adjusting fixing blocks are on the same straight line.
4. The concealed door hinge structure as described in any one of claims 1-3, characterized in that, Both the first adjusting fixing block and the second adjusting fixing block are rectangular plates. The centers of the first threaded hole on the first adjusting fixing block and the first threaded hole on the second adjusting fixing block are located on different planes, and the extensions of the first threaded hole on the first adjusting fixing block and the first threaded hole on the second adjusting fixing block do not interfere with each other.
5. The hidden door hinge structure as described in claim 1, characterized in that, The adjusting bolt includes a nut, a connecting rod, and a threaded rod, which are fixedly connected in sequence. The connecting rod is a cylinder, and two limiting rings are provided on the connecting rod. The two limiting rings are arranged in parallel and are perpendicular to the center line of the connecting rod. A limiting groove is formed between the two limiting rings, and the limiting groove is used to fix the eccentric limiting block.
6. The hidden door hinge structure as described in claim 1, characterized in that, One end of the rotating shaft sleeve is fixedly connected to the first bracket.
7. A method for installing a concealed door hinge structure, applied to the concealed door hinge structure as described in any one of claims 1-6, characterized in that, The method includes: The rotating shaft sleeve of the three-dimensional adjustment mechanism is welded and fixed to the first bracket; The movable adjustment box is connected to the base via an adjustment bolt assembly; The base of the adjusting shaft assembly is welded and fixed to the movable adjusting box; Insert the threaded post of the adjusting shaft assembly into the rotating shaft sleeve; Secure the base to the second bracket using self-tapping screws; The spatial installation position of the concealed door can be adjusted by rotating the adjusting bolt and the nut of the adjusting shaft assembly.