A reinforced cast aluminium door core

Abstract

This utility model discloses a reinforced cast aluminum door core, relating to the field of door core technology. The utility model includes a main structure comprising an embedded box, side plates at both ends of the embedded box, and mounting holes formed inside the side plates; and an adjustment structure comprising a bearing seat inside the embedded box, a worm gear rotatably mounted inside the embedded box, a rotating shaft rotatably mounted inside the bearing seat, a worm wheel sleeved on the outer wall of the rotating shaft and meshing with the worm gear, a gear at one end of the rotating shaft, a longitudinally distributed toothed plate meshing with the gear, a guide rail connected to the toothed plate, a mating block at the front end of the guide rail, and mounting holes formed inside the mating block. This utility model, by setting an embedded adjustment structure and using a modular adjustment structure within the adjustment structure, allows for longitudinal adjustment of the mounting holes for assembly, adapting to the installation needs of different door locks. This solves the problem of inconvenient adaptation and poor flexibility when replacing door locks with pre-set mounting holes.

Description

Technical Field

[0001] This utility model relates to the field of door core technology, and in particular to a reinforced cast aluminum door core. Background Technology

[0002] The aluminum door core is the filling and supporting structure inside the aluminum door. Its main function is to enhance the stability and resistance to deformation of the door, while also providing sound insulation and heat insulation. It is made of aluminum foil in a honeycomb structure, which is lightweight, high-strength, and has good sound and heat insulation properties. The rectangular groove on the side of the door is used to install the lock body.

[0003] Different brands and models of door locks have different lock body lengths, widths, lock cylinder positions, and handle spacing. A common specification is "6068 hole spacing"—the distance from the center of the lock cylinder hole to the center of the handle hole is 60mm, and the lock body length is 68mm. For example, if the lock body length of a door lock is 72mm, the corresponding lock body hole needs to be longer, and the hole spacing also needs to be matched.

[0004] The materials and structures of different door cores, such as the honeycomb density of aluminum honeycomb cores and the hardness of solid wood cores, affect the drilling position and spacing. For example, if the drilling spacing of an aluminum honeycomb core is too small, it may damage the honeycomb structure and cause door deformation. Conversely, if the hole spacing of a solid wood core does not match the lock body, the hardness of the wood may prevent the lock body from being fixed in place. This prevents users from replacing different models of door locks or door cores, such as switching from a regular mechanical lock to a smart lock or from an aluminum honeycomb core to a polyurethane core, limiting personalized needs. If a specific door core or lock is discontinued, the door may be unrepairable due to mismatched hole positions, requiring a complete door replacement. Therefore, those skilled in the art have provided a reinforced cast aluminum door core to solve the problems mentioned in the background. Utility Model Content

[0005] 1. Technical Solution

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a reinforced cast aluminum door core, comprising,

[0008] The main structure includes an embedded box, side panels located at both ends of the embedded box, and assembly holes opened inside the side panels;

[0009] as well as;

[0010] The adjustment structure includes a bearing housing located inside the embedded box, a worm gear rotatably mounted inside the embedded box, a rotating shaft rotatably mounted inside the bearing housing, a worm wheel sleeved on the outer wall of the rotating shaft and meshing with the worm gear, a gear located at one end of the rotating shaft, a gear plate longitudinally distributed and meshing with the gear, a guide rail connected to the gear plate, a mating block located at the front end of the guide rail, and a mounting hole opened inside the mating block.

[0011] Furthermore, the front end of the embedded box has two sets of operating slots, and one end of the worm gear is provided with a crosshead located inside the operating slot;

[0012] Specifically, the Phillips head is used for turning Torx screwdrivers. The operating groove hides the Phillips head to prevent it from coming out and affecting installation and use. At the same time, the hidden Phillips head improves the aesthetics.

[0013] Furthermore, a connecting block is provided at one end of the docking block, and a travel plate is provided at one end of the connecting block, which is slidably installed on the inner wall of the front end of the embedded box. The travel plate is fitted with docking holes corresponding to the mounting holes.

[0014] Specifically, the mounting holes inside the connecting block are used for the assembly of screws or threaded rods, and the assembled parts can be easily inserted into the mating holes and enter the mounting holes.

[0015] Furthermore, the front end of the embedded box is provided with a front window containing corresponding mounting holes and docking holes;

[0016] Specifically, the travel plate shields the front window, and the travel plate moves synchronously with the docking block. The mounting holes inside the docking block and the docking holes inside the travel plate move synchronously to ensure effective assembly of parts.

[0017] Furthermore, the outer walls at both ends of the guide rail are provided with roller grooves, and the inner wall of the embedded box is fixed with two sets of symmetrically distributed connecting rods. One end of each connecting rod is provided with a positioning block, and the positioning block is rotatably installed with equidistantly distributed and rollingly fitted with the roller grooves.

[0018] Specifically, the balls roll inside the grooves, providing low-resistance, low-friction sliding guidance for the longitudinally moving guide rail and sliding guidance for the toothed plate.

[0019] Furthermore, the embedded box is equipped with a damping shaft seat, and one end of the worm gear is rotatably mounted inside the damping shaft seat;

[0020] Specifically, when the worm rotates, it applies vibration resistance to the damping bearing through the damping element inside the damping bearing. The worm wheel and worm have self-locking characteristics, and the redundant design of the damping bearing reduces the risk of the worm rotating automatically.

[0021] 2. Beneficial effects

[0022] Compared with existing technologies, the advantages of this utility model are:

[0023] This utility model features an embedded box that is installed inside the side of a door and fixed to a reinforced cast aluminum door via a side plate. The mounting holes inside the door connect to a longitudinally moving toothed plate. The toothed plate is driven longitudinally by gears, which are supported by a rotating shaft. A worm gear on the outer wall of the shaft is driven by a worm. Through the linkage of structural components, the mounting holes are connected to the toothed plate via a mating block. The embedded box contains two independent adjustment structures, allowing the mounting holes to be adjusted longitudinally independently to accommodate different door lock replacements. This avoids the problem of pre-installed mounting holes on the door being unsuitable for different door lock models, thus improving usability.

[0024] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention from the first perspective.

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention from the second perspective.

[0028] Figure 3 This is a front-view three-dimensional structural diagram of the internal structure of the embedded box of this utility model;

[0029] Figure 4 This is a side view of the three-dimensional structure of the adjustment structure of this utility model;

[0030] Figure 5 This is a top-view three-dimensional structural diagram of the worm gear of this utility model;

[0031] Figure 6 This is a rear-view three-dimensional structural diagram of the positioning block of this utility model.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 100. Main structure; 101. Embedded box; 102. Operating slot; 103. Front window; 104. Side panel; 105. Assembly hole;

[0034] 200. Adjustment structure; 201. Crosshead; 202. Worm gear; 203. Bearing housing; 204. Stroke plate; 205. Guide rail; 206. Docking hole; 207. Rotating shaft; 208. Damping shaft housing; 209. Worm; 210. Gear; 211. Positioning block; 212. Ball bearing; 213. Docking block; 214. Gear plate; 215. Connecting block; 216. Connecting rod; 217. Mounting hole. Detailed Implementation

[0035] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0039] Example 1

[0040] Please see Figure 1-6 As shown, this embodiment is a reinforced cast aluminum door core, including,

[0041] The main structure 100 includes an embedded box 101, side plates 104 located at both ends of the embedded box 101, and mounting holes 105 opened inside the side plates 104.

[0042] as well as;

[0043] The adjustment structure 200 includes a bearing seat 203 located inside the embedded box 101, a worm gear 209 rotatably mounted inside the embedded box 101, a rotating shaft 207 rotatably mounted inside the bearing seat 203, a worm wheel 202 sleeved on the outer wall of the rotating shaft 207 and meshing with the worm gear 209, a gear 210 located at one end of the rotating shaft 207, a toothed plate 214 longitudinally distributed and meshing with the gear 210, a guide rail 205 connected to the toothed plate 214, a docking block 213 located at the front end of the guide rail 205, and a mounting hole 217 opened inside the docking block 213.

[0044] The front end of the embedded box 101 has two sets of operating slots 102, and one end of the worm gear 209 is provided with a crosshead 201 located inside the operating slot 102.

[0045] One end of the docking block 213 is provided with a connecting block 215, and one end of the connecting block 215 is provided with a travel plate 204 that is slidably installed on the inner wall of the front end of the embedded box 101. The travel plate 204 is provided with a docking hole 206 corresponding to the mounting hole 217.

[0046] The front end of the embedded box 101 has a front window 103 with corresponding mounting holes 217 and docking holes 206.

[0047] The guide rail 205 has grooves on both outer walls. The inner wall of the embedded box 101 is fixed with two sets of symmetrically distributed connecting rods 216. One end of each connecting rod 216 is provided with a positioning block 211. The positioning block 211 is rotatably installed with equidistantly distributed and rollingly fitted with the balls 212 inside the groove.

[0048] The embedded box 101 is equipped with a damping shaft seat 208, and one end of the worm gear 209 is rotatably installed inside the damping shaft seat 208.

[0049] Use the main structure 100 and the adjustment structure 200;

[0050] The embedded box 101 and the side plate 104 are made of high-strength cast aluminum alloy, Al-Si-Mg alloy, which is die-cast and then aged. The hardness can reach HB100-120 and the tensile strength ≥250MPa. This material is both lightweight, with a density of only 2.7g / cm3 and high rigidity, which can withstand the impact of repeated opening and closing of the door lock. At the same time, it has excellent corrosion resistance and is suitable for humid or outdoor environments. The mounting hole 105 is precision boring and anodized, with a surface roughness Ra≤1.6μm, which reduces wear during screw assembly and extends the connection life. The worm 209, worm wheel 202, and gear 210 are made of 20CrMnTi alloy steel, which is carburized and quenched. The tooth surface hardness reaches HRC58-62, and the tooth core maintains the toughness of HRC30-35, ensuring that the teeth are not easily broken or deformed during transmission. The transmission accuracy is controlled within 0.02mm.

[0051] The toothed plate 214 and guide rail 205 are made of 6061-T6 aluminum alloy, manufactured by extrusion molding process, and the surface is hard anodized with a film thickness of ≥15μm, which improves wear resistance and light weight, reducing power loss during adjustment. The mating block 213 and stroke plate 204 are made of reinforced nylon PA66+30% glass fiber, which has self-lubricating properties, a friction coefficient of ≤0.15 and aging resistance, and high dimensional stability in an environment of -40℃ to 80℃, avoiding abnormal noise caused by metal contact. The ball 212 is made of GCr15 bearing steel, and the positioning block 211 is made of zinc alloy die casting. The mating clearance is controlled at 0.01-0.03mm to ensure smooth rolling without jamming. The internal damping component of the damping bearing 208 is made of hydrogenated nitrile rubber, which is oil-resistant and temperature-resistant, and the damping coefficient is stable at 0.3-0.5N・m, effectively preventing the worm gear 209 from rotating automatically due to vibration.

[0052] The inner wall of the embedded box 101 is pre-reinforced with 3mm thick reinforcing ribs, forming a grid-like support structure to improve torsional strength and prevent door core deformation after long-term use. The side plate 104 has a stepped interlocking edge design, increasing the contact area with the door frame. After being fixed with M8×50mm expansion screws, the two sets of adjustment structures 200 can be operated independently. The longitudinal adjustment range of the mounting hole 217 is up to 50mm, covering mainstream hole spacing specifications such as 6068 and 7278. During the adjustment process, linear displacement is achieved through the meshing of the gear 210 rack and pinion, with an accuracy error of ≤0.5mm. The stroke plate 204 moves synchronously with the docking block 213. The movable window 103 completely covers the front window, preventing dust and rainwater from entering the door core and avoiding fingers or foreign objects from accidentally entering the adjustment mechanism. The cross head 201 is hidden, and the operating groove 102 is 8mm deep. After the cross head 201 is embedded, it is flush with the surface of the embedded box 101. It can be used with rubber dust plugs to improve the aesthetics and sealing of the door side. It is not only compatible with different types of door locks such as mechanical locks, smart locks, fingerprint locks, and password locks, but also adaptable to various door core materials such as aluminum honeycomb core and polyurethane foam core. By adjusting the spacing of the mounting holes 217, it avoids drilling and damaging the door core structure, such as the integrity of the honeycomb grid of the aluminum honeycomb core, and greatly improves durability.

[0053] The transmission components, including the worm gear 209, worm wheel 202, and gear 210, are designed to be adjustable without the need for specialized tools, requiring only a Torx screwdriver. During adjustment, the ball bearing 212 guides the operation with a force of ≤5N, equivalent to the force required to lift a 500g object. This allows for installation by a single person, improving installation efficiency. The self-locking characteristics of the worm wheel 202 and worm gear 209 ensure a reverse transmission efficiency of ≤1%, while the damping bearing 208 provides double anti-loosening protection. This ensures that once the mounting hole 217 is locked, it will not shift due to external forces such as door impacts, preventing safety hazards caused by lock malfunction.

[0054] All structural components are modularly designed, eliminating the need to disassemble the entire door core during maintenance. Spare parts are highly versatile and compatible with mainstream market specifications. Through material upgrades, functional refinements, and the addition of advantages, this reinforced cast aluminum door core exhibits significant advantages in terms of adaptability, durability, and security, completely solving the problems of poor compatibility and difficult maintenance associated with traditional pre-drilled hole door cores.

[0055] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A reinforced cast aluminum door core, characterized in that: include, The main structure (100) includes an embedded box (101), side plates (104) located at both ends of the embedded box (101), and assembly holes (105) opened inside the side plates (104). as well as; The adjustment structure (200) includes a bearing housing (203) located inside the embedded box (101), a worm gear (209) rotatably mounted inside the embedded box (101), a rotating shaft (207) rotatably mounted inside the bearing housing (203), a worm wheel (202) sleeved on the outer wall of the rotating shaft (207) and meshing with the worm gear (209), a gear (210) located at one end of the rotating shaft (207), a toothed plate (214) longitudinally distributed and meshing with the gear (210), a guide rail (205) connected to the toothed plate (214), a docking block (213) located at the front end of the guide rail (205), and a mounting hole (217) opened inside the docking block (213).

2. The reinforced cast aluminum door core according to claim 1, characterized in that: The front end of the embedded box (101) has two sets of operating slots (102), and one end of the worm gear (209) is provided with a crosshead (201) located inside the operating slot (102).

3. The reinforced cast aluminum door core according to claim 1, characterized in that: One end of the docking block (213) is provided with a connecting block (215), and one end of the connecting block (215) is provided with a travel plate (204) that is slidably installed on the inner wall of the front end of the embedded box (101). The travel plate (204) is provided with a docking hole (206) corresponding to the mounting hole (217).

4. The reinforced cast aluminum door core according to claim 1, characterized in that: The front window (103) of the embedded box (101) has corresponding mounting holes (217) and docking holes (206) inside.

5. A reinforced cast aluminum door core according to claim 1, characterized in that: The guide rail (205) has grooves on both outer walls. The inner wall of the embedded box (101) is fixed with two sets of symmetrically distributed connecting rods (216). One end of each connecting rod (216) is provided with a positioning block (211). The positioning block (211) is rotatably installed with equidistantly distributed and rollingly attached balls (212) inside the groove.

6. A reinforced cast aluminum door core according to claim 1, characterized in that: The embedded box (101) is equipped with a damping shaft seat (208), and one end of the worm gear (209) is rotatably installed inside the damping shaft seat (208).

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