Hidden hinge structure for doors and windows

Abstract

This utility model discloses a concealed door and window hinge structure, relating to the field of architectural hardware technology. The utility model includes hinge blades, a hinge shaft inside the hinge blades, a hinge plate movably connected to the surface of the hinge shaft, and an oiling mechanism inside the hinge shaft. The oiling mechanism includes an oil storage pipe inside the hinge shaft, a sintered metal strip fixedly connected inside the hinge shaft, and an oil delivery pipe fixedly connected to one side of the sintered metal strip. This utility model uses a miniature double-headed cylinder to controllably push a push block wrapped with a sealing strip, directionally squeezing lubricating oil within the oil storage pipe. The lubricating oil flows into the internal pores of the sintered metal strip through the oil delivery pipe. The stroke of the miniature double-headed cylinder controls the amount of lubricating oil squeezed out, avoiding excessive or insufficient flow. The sealing strip tightly adheres to the inner wall of the oil storage pipe, preventing backflow of lubricating oil and ensuring complete delivery of lubricant to the friction surface.

Description

Technical Field

[0001] This utility model belongs to the field of building hardware technology, and in particular relates to a concealed door and window hinge structure. Background Technology

[0002] Concealed door and window hinges are key hardware components for doors and windows. Their main feature is that when the door or window is closed, the main structure of the hinge is completely or mostly embedded and hidden in the internal grooves of the door and window frame and sash, making it invisible. This design gives doors and windows significant advantages such as simplicity and beauty, strong integrity, high security, and prevention of clothing snagging. Therefore, it has been widely used in modern building doors and windows, especially high-end system doors and windows. However, traditional concealed hinges generally face a thorny problem in actual use: increased friction and wear and abnormal noise caused by lubrication failure. Because the core rotating parts of the hinge bear the static load of the door and window and the dynamic load of frequent opening and closing, friction between their mating surfaces is inevitable. Over time, the initially applied lubricant will gradually be consumed. More importantly, due to the concealed structure, small space, and deep embedding of components in the profile, it is difficult for users to perform regular manual lubrication maintenance on concealed hinges.

[0003] Existing concealed hinges still have some problems during use. For example, insufficient lubrication leads to direct dry friction or boundary friction between metal parts, significantly accelerating surface wear and producing metal debris. Increased friction and the presence of metal debris cause harsh noises when opening and closing doors and windows, seriously affecting the user experience and the comfort of the living environment. The tiny metal particles generated by wear are more likely to trigger or accelerate electrochemical corrosion in humid environments, further damaging the mating surfaces. Continuous wear, corrosion, and the resulting deformation or jamming will eventually lead to a decrease in the hinge's load-bearing capacity, inflexible rotation, or even functional failure, significantly shortening the service life of the hinge and even the entire door and window system.

[0004] To address these issues, we provide a concealed door and window hinge structure. Utility Model Content

[0005] The purpose of this utility model is to provide a concealed door and window hinge structure. By cooperating with the oiling mechanism and the pushing mechanism, it solves the problem of insufficient lubrication in existing concealed hinges, which leads to direct dry friction or boundary friction between metal parts and significantly accelerates surface wear.

[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 concealed door and window hinge structure, including hinge blades, a hinge shaft inside the hinge blades, a hinge plate movably connected to the surface of the hinge shaft, an oiling mechanism inside the hinge shaft, the oiling mechanism including an oil storage pipe inside the hinge shaft, a sintered metal strip fixedly connected inside the hinge shaft, and an oil delivery pipe fixedly connected to one side of the sintered metal strip, and a pushing mechanism inside the hinge shaft, the pushing mechanism including a miniature double-headed cylinder fixedly connected inside the hinge shaft, a pushing block fixedly connected to the output end of the miniature double-headed cylinder, and a sealing strip fixedly connected inside the pushing block.

[0008] The present invention is further configured such that a hidden groove adapted to the hinge shaft and the hinge plate is provided inside the hinge blade, and a power box is fixedly connected inside the hidden groove. The power box contains a power source, a battery and a controller.

[0009] The present invention is further configured such that the inside of the oil storage pipe is hollow, and the end of the oil storage pipe near the push block is open.

[0010] The present invention is further configured such that the pushing block extends into the oil storage pipe from the side away from the micro double-headed cylinder, and the oil delivery pipe is connected to the other end of the oil storage pipe.

[0011] The present invention is further configured such that a sealing groove adapted to the sealing strip is provided inside the pushing block, and the oil delivery pipe is a tee pipe.

[0012] The present invention is further configured such that there are four sintered metal strips, which are respectively disposed on both sides of the top and bottom of the hinge shaft, and the hinge shaft has a fixing groove adapted to the sintered metal strips.

[0013] The present invention is further configured such that reinforcing blocks are fixedly connected to the surfaces of the oil storage pipe and the miniature double-headed cylinder, and the reinforcing blocks are fixedly connected inside the hinge shaft.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model uses a miniature double-headed cylinder to controllably push a pusher block wrapped with a sealing strip, which directionally squeezes lubricating oil in the oil storage pipe. The lubricating oil flows into the internal pores of the sintered metal strip through the oil delivery pipe. The stroke of the miniature double-headed cylinder controls the amount of lubricating oil squeezed out, avoiding excessive or insufficient amount. The sealing strip is tightly attached to the inner wall of the oil storage pipe to prevent the lubricating oil from leaking back and to ensure that the lubricant is completely delivered to the friction surface.

[0016] 2. The lubricating oil of this invention continuously penetrates to the surface of the sintered metal strip through a three-dimensional interconnected pore network under capillary action, and automatically diffuses along the contact surface between the hinge shaft and the hinge plate. The capillary force drives the lubricating oil to be released slowly, forming a stable oil film, reducing direct friction between metals. The porous structure enables micro-volume long-term oil supply, significantly reducing wear and abnormal noise, and extending the life of the hinge. The oiling mechanism and the pushing mechanism work together to achieve a closed loop of "extrusion conveying → capillary penetration". The pushing mechanism provides quantitative oil supply, and the oiling mechanism continuously releases oil, effectively solving the problem of manual lubrication caused by the closed structure of concealed hinges.

[0017] 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

[0018] 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.

[0019] Figure 1 This is a three-dimensional diagram of a concealed door and window hinge structure.

[0020] Figure 2 This is a partial sectional view of the hinge axis in a concealed door and window hinge structure.

[0021] Figure 3 This is a cross-sectional view of the hinge axis in a concealed door and window hinge structure.

[0022] Figure 4 This is a structural diagram of the oiling mechanism in a concealed door and window hinge structure.

[0023] Figure 5 This is a structural diagram of the pushing mechanism in a concealed door and window hinge structure.

[0024] In the attached diagram: 1. Hinge blade; 2. Hinge shaft; 3. Hinge plate; 4. Oiling mechanism; 401. Oil reservoir; 402. Sintered metal strip; 403. Oil delivery pipe; 5. Pushing mechanism; 501. Miniature double-headed cylinder; 502. Pushing block; 503. Sealing strip; 6. Power box; 7. Reinforcing block. Detailed Implementation

[0025] 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 skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation Example 1

[0027] Please see Figures 1-5 This utility model is a concealed door and window hinge structure, including a hinge blade 1, a hinge shaft 2 inside the hinge blade 1, a hinge plate 3 movably connected to the surface of the hinge shaft 2, an oiling mechanism 4 inside the hinge shaft 2, the oiling mechanism 4 including an oil storage pipe 401 inside the hinge shaft 2, a sintered metal strip 402 fixedly connected inside the hinge shaft 2, and an oil delivery pipe 403 fixedly connected to one side of the sintered metal strip 402, a pushing mechanism 5 inside the hinge shaft 2, the pushing mechanism 5 including a miniature double-headed cylinder 501 fixedly connected inside the hinge shaft 2, the principle of the miniature double-headed cylinder 501 is to generate compressed gas through the conversion of electrical energy → mechanical energy → air pressure energy, which drives the cylinder to move. This is existing technology, and this solution will not be described in detail. Moreover, those skilled in the art can clearly understand this working principle. A pushing block 502 fixedly connected to the output end of the miniature double-headed cylinder 501, and a sealing strip 503 fixedly connected inside the pushing block 502.

[0028] Specifically, through the setting of the oiling mechanism 4, a lubricating oil delivery channel and capillary penetration network are established. The oil storage pipe 401 stores the lubricating oil, and the oil delivery pipe 403 connects the oil storage pipe 401 and the sintered metal strip 402. The sintered metal strip 402 forms a capillary network through its three-dimensional interconnected pores. The lubricating oil flows from the oil storage pipe 401 into the interior of the sintered metal strip 402 through the oil delivery pipe 403. Utilizing its porous characteristics, the sintered metal strip 402 continuously permeates the lubricating oil from its internal pores to the surface through capillary action. Under the action of surface tension, the lubricating oil automatically diffuses along the surface of the sintered metal strip 402, covering the contact surface between the hinge shaft 2 and the hinge plate 3. The capillary network achieves slow and continuous release of the lubricating oil, avoiding excessive oil supply at one time. The lubricating oil spontaneously permeates into the hinge rotating pair, forming a uniform oil film and reducing direct friction between metals. Through the setting of the pushing mechanism 5, power is provided and the lubricating oil is directed to flow in a sealed manner. 502 extends into the oil storage pipe 401, and the sealing strip 503 ensures no leakage between it and the pipe wall. After receiving the controller command, the output end of the miniature double-headed cylinder 501 pushes the pusher block 502 to move inside the oil storage pipe 401. The pusher block 502 is pushed deeper into the oil storage pipe 401, squeezing the lubricating oil in the pipe to flow to the outlet of the oil delivery pipe 403. The sealing strip 503 is tightly attached to the inner wall of the oil storage pipe 401 to prevent the lubricating oil from leaking back. The amount of lubricating oil squeezed out is controlled by the stroke of the cylinder to achieve precise and regular lubrication replenishment. The sealing structure ensures that the lubricating oil is completely directed to the sintered metal strip 402, avoiding waste or contamination. The pushing mechanism 5 pushes the lubricating oil into the oil delivery pipe 403 in a metered manner. The oiling mechanism 4 continuously releases lubricating oil to the friction surface through the sintered metal strip 402. This process does not require manual intervention, which solves the lubrication maintenance problem caused by the closed structure of the concealed hinge, significantly reduces wear and abnormal noise, and extends service life. Specific Implementation Example 2

[0030] Please see Figures 1-5Based on the first specific embodiment, the hinge blade 1 has a hidden groove inside that matches the hinge shaft 2 and the hinge plate 3. A power box 6 is fixedly connected inside the hidden groove. The power box 6 contains a power source, a battery, and a controller. The power source is an electric pneumatic pump (model SMCZSE30A-01-06), the battery is an EEMBER14250, and the controller is an Arduino Nano33BLE. The oil reservoir 401 has a hollow design, and the end of the oil reservoir 401 near the push block 502 is open. The push block 502 is far from the micro... One side of the double-headed cylinder 501 extends into the oil storage pipe 401. The oil supply pipe 403 is connected to the other end of the oil storage pipe 401. The push block 502 has a sealing groove inside that matches the sealing strip 503. The oil supply pipe 403 is a three-way pipe. There are four sintered metal strips 402. The four sintered metal strips 402 are respectively set on both sides of the top and bottom of the hinge shaft 2. The hinge shaft 2 has a fixing groove inside that matches the sintered metal strips 402. The oil storage pipe 401 and the surface of the miniature double-headed cylinder 501 are both fixedly connected with reinforcing blocks 7. The reinforcing blocks 7 are fixedly connected inside the hinge shaft 2.

[0031] Specifically, the power box 6 provides medium pressure to the miniature double-headed cylinder 501, and the controller controls the operation of the miniature double-headed cylinder 501. The hollow oil storage pipe 401 is used to store liquid lubricating oil. The oil storage pipe 401 with one end open allows the push block 502 to extend into the oil storage pipe 401. The push block 502 is used to push the liquid lubricating oil to the oil delivery pipe 403. The sealing groove and sealing strip 503 improve the sealing performance of the push block 502 and prevent the liquid lubricating oil from leaking through the push block 502. The four sintered metal strips 402 form a capillary network of three-dimensional interconnected pores. Under the action of surface tension, the liquid lubricating oil spontaneously permeates to the hinge plate 3 to lubricate the hinge shaft 2 and the hinge plate 3. The reinforcing block 7 is used to fix the oil storage pipe 401 and the miniature double-headed cylinder 501, and at the same time enhance the internal structural strength of the hinge shaft 2.

[0032] The operation process of this embodiment is as follows: the time interval for replenishing liquid lubricating oil is set in the controller. When the replenishment time is reached, the controller sends a command to the power source. At this time, the micro double-headed cylinder 501 extends and drives the push block 502 to move. The push block 502 squeezes the liquid lubricating oil inside the oil storage pipe 401 and moves it to the oil delivery pipe 403. The liquid lubricating oil enters the sintered metal strip 402 through the oil delivery pipe 403 and slowly wets the surface of the hinge shaft 2 through the capillary network on the sintered metal strip 402, thus lubricating the hinge shaft 2 and the hinge plate 3.

[0033] The controller automatically triggers the lubrication cycle according to the preset time without manual intervention. After lubrication is completed, the miniature double-headed cylinder 501 stops, the push block 502 stops at the existing position, and the system enters standby mode, waiting for the next cycle command, forming a closed-loop automatic lubrication maintenance.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A concealed door and window hinge structure, comprising hinge blades (1), characterized in that: The hinge blade (1) is provided with a hinge shaft (2) inside, and a hinge plate (3) is movably connected to the surface of the hinge shaft (2). The hinge shaft (2) is provided with an oiling mechanism (4). The oiling mechanism (4) includes an oil storage pipe (401) provided inside the hinge shaft (2), a sintered metal strip (402) fixedly connected inside the hinge shaft (2), and an oil delivery pipe (403) fixedly connected to one side of the sintered metal strip (402). The hinge shaft (2) is provided with a pushing mechanism (5), which includes a miniature double-headed cylinder (501) fixedly connected inside the hinge shaft (2), a pushing block (502) fixedly connected to the output end of the miniature double-headed cylinder (501), and a sealing strip (503) fixedly connected inside the pushing block (502).

2. The concealed door and window hinge structure according to claim 1, characterized in that, The hinge blade (1) has a hidden groove inside that is compatible with the hinge shaft (2) and the hinge plate (3). A power box (6) is fixedly connected inside the hidden groove. The power box (6) contains a power source, a battery and a controller.

3. The concealed door and window hinge structure according to claim 1, characterized in that, The oil storage pipe (401) has a hollow interior and the end of the oil storage pipe (401) near the push block (502) is open.

4. The concealed door and window hinge structure according to claim 1, characterized in that, The push block (502) extends into the oil storage pipe (401) from the side away from the micro double-headed cylinder (501), and the oil delivery pipe (403) is connected to the other end of the oil storage pipe (401).

5. The concealed door and window hinge structure according to claim 1, characterized in that, The push block (502) has a sealing groove inside that is compatible with the sealing strip (503), and the oil pipe (403) is a three-way pipe.

6. The concealed door and window hinge structure according to claim 1, characterized in that, The number of sintered metal strips (402) is four. The four sintered metal strips (402) are respectively arranged on both sides of the top and bottom of the hinge shaft (2). The hinge shaft (2) has a fixing groove that is adapted to the sintered metal strips (402).

7. The concealed door and window hinge structure according to claim 1, characterized in that, The oil storage pipe (401) and the surface of the miniature double-headed cylinder (501) are both fixedly connected with reinforcing blocks (7), and the reinforcing blocks (7) are fixedly connected inside the hinge shaft (2).

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