A high-strength skeleton structure of solid wood composite door
By optimizing the internal support structure of solid wood composite doors and using high-strength metal materials, the problems of easy deformation and poor durability of solid wood composite doors have been solved, achieving an improvement in strength and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU GUANNIU INTELLIGENT OVERALL HOME CO LTD
- Filing Date
- 2025-04-27
- Publication Date
- 2026-06-05
AI Technical Summary
Solid wood composite doors are prone to deformation and have poor durability when subjected to external forces, and they are also heavy, so it is necessary to improve their load-bearing capacity and stability.
The internal support structure of the composite door is designed with high-strength metal materials, including main support rods, I-beam wheels, secondary support rods, and aluminum alloy crossbars. By optimizing the support frame and material selection, the connection is strengthened to form a high-strength skeleton structure.
It improves the compression, bending and tensile strength of solid wood composite doors, enhances the stability and service life of the door, and is suitable for use in homes and commercial spaces.
Smart Images

Figure CN224326217U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of composite doors, specifically a high-strength frame structure for solid wood composite doors. Background Technology
[0002] As a crucial component of building structures, doors withstand multiple forces from the outside world, including impacts, vibrations, and wind. Solid wood composite doors, in particular, while possessing strong aesthetic appeal and practicality, also face challenges such as heavy weight, susceptibility to deformation, and poor durability. To improve the load-bearing capacity and stability of doors, designers need to address these issues by strengthening the door's supporting structure and optimizing its mechanical properties. Utility Model Content
[0003] To address the aforementioned shortcomings, this utility model aims to improve the door's resistance to pressure, bending, and tension by strengthening the internal support structure, thereby enhancing the door's load-bearing capacity and service life. This utility model achieves this through the following technical solution:
[0004] A high-strength frame structure for a solid wood composite door includes a door body, with an upper frame and a lower frame at the top and bottom respectively. An outer frame and an inner frame are provided on both sides of the door body. A rectangular tubular crossbar is provided in the middle of the outer and inner frames. A fixing block is provided in the middle of the crossbar, and a threaded hole is provided vertically in the middle of the fixing block. A main support rod is provided inside the threaded hole. Several I-beam wheels are provided on the main support rods above and below the crossbar. Secondary support rods are provided on both sides of the I-beam wheels, connecting the inner and outer frames.
[0005] Furthermore, the outer side of the main support rod is provided with external threads corresponding to the threaded holes on the I-beam wheel and the fixing block, and the shaft center of the I-beam wheel is provided with a threaded hole corresponding to the main support rod.
[0006] Furthermore, the crossbar is a hollow rectangular aluminum tube, and crossbars are provided at the four corners of the aluminum tube.
[0007] Furthermore, the inner sides of the upper and lower frames are provided with mounting grooves corresponding to the main support rod.
[0008] Furthermore, both the outer frame and the inner frame have grooves on their inner sides that correspond to the secondary support rod and the crossbar.
[0009] Furthermore, a wooden block is provided at one end of the crossbar near the outer frame.
[0010] Furthermore, the door is covered with a layer of solid wood veneer, and the area divided by the crossbar, main support bar, and secondary support bar is provided with a door core panel. The crossbar, main support bar, and secondary support bar are all made of lightweight aluminum alloy.
[0011] The beneficial effects of this utility model are: 1. The high-strength frame structure of the solid wood composite door of this utility model utilizes an advanced design combining metal and wood, which not only ensures the beauty and sturdiness of the door body, but also provides excellent resistance to pressure, corrosion and deformation, making it very suitable for use in modern homes and commercial spaces; 2. The structure of this utility model is simple and easy to install. By optimizing the internal support frame, rationally distributing the stress, selecting high-strength materials and strengthening the connection parts, the strength and stability of the door body in terms of pressure resistance, bending resistance, and tensile resistance are improved, thereby effectively improving the durability and safety of the entire composite door. Attached Figure Description
[0012] Figure 1 This is a front cross-sectional view of the present invention.
[0013] Figure 2 This is a schematic diagram of the internal support structure of this utility model.
[0014] In the diagram: 1-Door body, 2-Upper frame, 3-Lower frame, 4-Outer frame, 5-Inner frame, 6-Horizontal bar, 7-Fixing block, 8-Main support rod, 9-I-shaped wheel, 10-Horizontal bar, 11-Mounting groove, 12-Secondary support rod, 13-Groove, 14-Mounting wooden block. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] Combination Figure 1 As shown in the figure:
[0017] A high-strength frame structure for a solid wood composite door includes a door body 1. The door body 1 has an upper frame 2 and a lower frame 3, respectively. The inner sides of the upper frame 2 and lower frame 3 have mounting grooves 11 corresponding to the main support rod 8 for mounting the main support rod 8. The door body 1 has an outer frame 4 and an inner frame 5 on both sides. The inner sides of both the outer frame 4 and inner frame 5 have grooves 13 corresponding to the secondary support rod 12 and the crossbar 10 for supporting the crossbar 10 and the secondary support rod 12. A rectangular tubular crossbar 6 is provided in the middle of the outer frame 4 and inner frame 5 to fix the middle of the door body. The crossbar 6 is a hollow rectangular aluminum tube, with crossbars 10 at each of the four corners inside the aluminum tube. A fixing block 7 is provided in the middle of the crossbar 6, and a wooden block 14 is provided at one end of the crossbar 6 near the outer frame 4 for installing the door lock.
[0018] The fixed block 7 has a threaded hole in the middle vertically, and a main support rod 8 is installed in the threaded hole. Several I-beam wheels 9 are installed on the main support rods 8 above and below the crossbar 6. Auxiliary support rods 12 are provided on both sides of the I-beam wheels 9 to connect the inner frame 5 and the outer frame 4. The outer side of the main support rod 8 has external threads corresponding to the threaded holes on the I-beam wheels 9 and the fixed block 7. The axis of the I-beam wheel 9 has a threaded hole corresponding to the main support rod 8, so that the I-beam wheel 9 can rotate and move up and down. With the cooperation of the groove 13, the auxiliary support rod 12 can bend up and down to a certain extent, which can adjust the support function.
[0019] The door body 1 is covered with a layer of solid wood veneer. Small door core panels are set in the areas divided by the crossbar 10, the main support bar 8 and the secondary support bar 12. The panels are spliced into upper and lower door core panels according to the area division structure. The crossbar 10, the main support bar 8 and the secondary support bar 12 are all made of lightweight aluminum alloy, which provides high strength support while reducing the increase in weight.
[0020] Working principle:
[0021] First, place the wooden blocks inside the crossbar. The crossbar passes through both ends of the crossbar. A main support rod is installed inside the fixing block, and I-beam wheels are mounted on the main support rod. Secondary support rods are placed on both sides of the I-beam wheels. A door panel is placed between the crossbar, secondary support rods, and crossbar. The door panel consists of two pieces of board, upper and lower, assembled from smaller boards according to the board structure divided between the crossbar, secondary support rods, and crossbar. It has rectangular grooves corresponding to the positions of the secondary support rods. The rotation of the I-beam wheels allows for up-and-down movement, controlling the tightness and thus strengthening the fixation of the door panel. At this point, the inner and outer frames are recessed... The grooves correspond to the crossbars and secondary support bars, merging on both sides. The upper and lower frames are then installed to the upper and lower sides through the mounting grooves to form an overall frame structure. Solid wood veneer is then laid on the surface of the door. This skeleton structure utilizes an advanced design that combines metal and wood, ensuring both the beauty and sturdiness of the door, while also providing excellent resistance to pressure, corrosion, and deformation. The structure is simple and easy to install. By optimizing the internal support frame, rationally distributing the stress, selecting high-strength materials, and reinforcing the connection parts, the strength and stability of the door in terms of pressure resistance, bending resistance, and tensile strength are improved.
[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A high-strength frame structure for a solid wood composite door, characterized in that: The door includes a door body (1), which has an upper frame (2) and a lower frame (3) on the top and bottom respectively. The door body (1) has an outer frame (4) and an inner frame (5) on both sides respectively. The outer frame (4) and the inner frame (5) have a rectangular tube-shaped crossbar (6) in the middle. The crossbar (6) has a fixing block (7) in the middle. The fixing block (7) has a threaded hole in the middle in the vertical direction. The threaded hole has a main support rod (8). The main support rod (8) above and below the crossbar (6) has several I-beam wheels (9). The I-beam wheels (9) have auxiliary support rods (12) on both sides to connect the inner frame (5) and the outer frame (4).
2. The high-strength frame structure for a solid wood composite door according to claim 1, characterized in that: The outer side of the main support rod (8) is provided with an external thread corresponding to the threaded hole on the I-beam wheel (9) and the fixed block (7), and the shaft center of the I-beam wheel (9) is provided with a threaded hole corresponding to the main support rod (8).
3. The high-strength frame structure for a solid wood composite door according to claim 2, characterized in that: The crossbar (6) is a hollow rectangular aluminum tube, and crossbars (10) are provided at the four corners of the aluminum tube.
4. The high-strength frame structure for a solid wood composite door according to claim 3, characterized in that: The inner sides of the upper frame (2) and the lower frame (3) are provided with mounting grooves (11) corresponding to the main support rod (8).
5. The high-strength frame structure for a solid wood composite door according to claim 4, characterized in that: The outer frame (4) and the inner frame (5) are both provided with grooves (13) corresponding to the secondary support rod (12) and the crossbar (10).
6. The high-strength frame structure for a solid wood composite door according to claim 5, characterized in that: The crossbar (6) has a wooden block (14) installed at one end near the outer frame (4).
7. The high-strength frame structure for a solid wood composite door according to claim 6, characterized in that: The door body (1) is covered with a layer of solid wood veneer. The area divided by the crossbar (10), the main support rod (8) and the secondary support rod (12) is provided with a door core panel. The crossbar (10), the main support rod (8) and the secondary support rod (12) are all made of lightweight aluminum alloy.