Novel engineering concealed hinge
By employing a combination design of rotating sash blades and fixed frame plates on concealed hinge door frames, combined with planar thrust bearings and a welding-free installation method, the problems of low assembly efficiency, abnormal noise, and small opening angle of existing concealed hinge door frames are solved, achieving efficient, stable, and low-cost concealed hinges.
Patent Information
- Application Number
- CN202520472462.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-18
AI Technical Summary
The existing concealed hinge door frame requires welding the hinge box, which is prone to rust, has low assembly efficiency, the rotation center is in the frame hinge, and there are abnormal noises and a small opening angle.
The rotating fan blades and the fixed frame are fixed on the same axis by a pin rod. A planar thrust bearing is added. The rotating fan blades and the fixed frame are fixed by bolts. The hinge fan blades are fixed to the door leaf. The hinge box is pressed against the door frame by the fixed frame to avoid welding.
It improved assembly efficiency, reduced abnormal noise, expanded the opening angle to 116°, ensured product stability and reliability, and reduced costs.
Smart Images
Figure CN223794039U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of concealed hinge technology, specifically to a novel concealed hinge for engineering applications. Background Technology
[0002] Existing concealed hinges on the market require welding hinge boxes to the door frame, and these hinge boxes are prone to rust. Assembly and debugging are slow, and accessories such as hinge frame pieces, hinge bearings, hinge pins, and pin fixing pins need to be installed, making concealed installation inefficient. Furthermore, the load-bearing and rotation center of existing concealed hinges is in the frame hinge, using a central axis for rotation. Over time, the hinges will produce abnormal noises, and the opening angle is relatively small. Utility Model Content
[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a new type of concealed hinge for engineering applications.
[0004] The objective of this utility model is achieved through the following technical solution:
[0005] A novel concealed hinge for engineering applications includes a fixed frame, a pin, and a hinge blade. The hinge blade includes a hinged hinge blade and a rotating hinge blade. The rotating hinge blade and the fixed frame are fixed on the same axis by the pin. The rotating hinge blade is arc-shaped and can rotate around the pin. A planar thrust bearing is provided between the rotating hinge blade and the fixed frame, and the planar thrust bearing is sleeved on the pin. The rotating hinge blade and the hinged hinge blade are detachably connected. The hinged hinge blade is L-shaped, with one side connected to the rotating hinge blade and the other side connected to the door leaf. The fixed frame has bolt holes and is equipped with matching second fixing bolts, which fix the fixed frame to the door frame.
[0006] Specifically, bolt holes are provided on the rotating fan blades and the hinge fan blades, and a matching first fixing bolt is provided to fix the hinge fan blades and the rotating fan blades together.
[0007] A protective plate is provided at the bottom of the hinge leaf and the door leaf fixing surface to prevent damage to the connection between the hinge leaf and the rotating leaf when the rotating leaf rotates at too large an angle.
[0008] The aforementioned new type of concealed hinge also includes a hinge box. During assembly, the hinge box is pressed against the door frame by the fixing frame piece. As the second fixing bolt tightens the fixing frame piece, the hinge box is simultaneously fixed.
[0009] The beneficial effects of this utility model are:
[0010] 1) The concealed hinge provided by this utility model is pre-assembled using equipment and employs interference fit, resulting in small gaps and minimal errors. A planar thrust bearing is added between the rotating blade and the fixed frame, reducing rotational friction. As long as the round steel ball in the bearing does not break, the small contact area between the steel ball and the hinge plane during rotation further minimizes friction, virtually eliminating the possibility of abnormal noise. After 200,000 opening and closing tests, the hinge showed no abnormal noise and the product exhibited no deformation. This new type of hinge offers higher product stability and reliability while reducing overall cost. Through the cooperation of the hinge blade and the rotating blade, the opening angle of this new concealed hinge can reach 116°.
[0011] 2) By using various components to fix each other, no welding is required between the components and the door frame during assembly. No pins or hinge accessories are needed, and the overall processing efficiency is faster than that of old-fashioned hinges.
[0012] 3) When installing the fixed frame, the hinge box is clipped between the fixed frame and the door frame, eliminating the need to weld the hinge box and improving installation efficiency. Attached Figure Description
[0013] Figure 1 This is a perspective view of the concealed hinge in Example 1;
[0014] Figure 2 This is a side view of the concealed hinge in Example 1;
[0015] Figure 3 This is a perspective view of the concealed hinge in Example 2;
[0016] Figure 4 3D diagram of concealed hinge installation;
[0017] Figure 5 Side view of concealed hinge installation;
[0018] In the diagram, 1-hinge leaf, 2-fixed frame piece, 3-rotating leaf, 4-pin rod, 5-protective piece, 61-first fixing bolt, 62-second fixing bolt, 7-hinge box, 8-door frame, 9-door leaf. Detailed Implementation
[0019] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0020] Example 1
[0021] See Figure 1-5 This utility model provides a technical solution:
[0022] A novel concealed hinge for engineering applications includes a fixed frame 2, a pin 4, and slats. The slats include a hinge slat 1 and a rotating slat 3. The rotating slat 3 and the fixed frame 2 are fixed on the same axis by the pin 4. A planar thrust bearing is provided between the rotating slat 3 and the fixed frame 2, and the planar thrust bearing is sleeved on the pin 4. The rotating slat 3 is arc-shaped and can rotate around the pin 4 as its rotation center. Bolt holes are provided on both the rotating slat 3 and the hinge slat 1, and a matching first fixing bolt 61 is provided. The first fixing bolt 61 can fix the hinge slat 1 and the rotating slat 3 together to achieve large-angle rotation. The hinge slat 1 is L-shaped, fixed to the rotating slat 3 on one side and to the door leaf 9 on the other. A protective piece 5 is provided at the bottom of the side fixed to the door leaf 9 to prevent damage to the connection between the hinge slat 1 and the rotating slat 3 when the rotating slat 3 rotates too much. The hinge slat 1 can be fixed to the door leaf 9 by bolts or welding. The other end of the fixed frame piece 2 has a bolt hole and is equipped with a matching second fixing bolt 62, which can fix the fixed frame piece 2 to the door frame 8.
[0023] In this embodiment, both the first fixing bolt 61 and the second fixing bolt 62 are fixed with M8 flat screws. The maximum opening and closing angle of the entire device can reach 116°, and the number of opening cycles can be guaranteed to be 200,000 times without abnormal noise or sagging. The product performance is stable.
[0024] Example 2
[0025] See Figure 3-5 In this embodiment, a hinge box 7 is added to the first embodiment. The hinge box 7 is integrally molded by injection molding. There is no connection between the hinge box 7 and the concealed hinge. When assembling the door frame 8 and the door leaf 9, the hinge box 7 is pressed onto the door frame 8 by the fixing frame piece 2. As the second fixing bolt 62 tightens the fixing frame piece 2, the hinge box 7 is simultaneously fixed.
[0026] This new type of hinge is suitable for various door products. The flat thrust bearing plays a key role in solving the problem of abnormal noise, and the bearing steel balls have high requirements for smoothness.
[0027] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.
Claims
1. A novel concealed hinge for engineering applications, characterized in that: The device includes a fixed frame, a pin, and fan blades. The fan blades include hinged fan blades and rotating fan blades. The rotating fan blades and the fixed frame are fixed on the same axis by the pin. The rotating fan blades are arc-shaped and can rotate around the pin. A planar thrust bearing is provided between the rotating fan blades and the fixed frame, and the planar thrust bearing is sleeved on the pin. The rotating fan blades and the hinged fan blades are detachably connected. The hinged fan blades are L-shaped, with one side connected to the rotating fan blades and the other side connected to the door leaf. The fixed frame has bolt holes and is equipped with matching second fixing bolts, which fix the fixed frame to the door frame.
2. The novel concealed hinge according to claim 1, characterized in that: The rotating fan blade and the hinge fan blade are provided with bolt holes and are equipped with matching first fixing bolts, which are used to fix the hinge fan blade and the rotating fan blade together.
3. The novel concealed hinge according to claim 1, characterized in that: The bottom of the hinge blade and the door leaf fixing surface is provided with a protective plate to prevent damage to the connection between the hinge blade and the rotating blade when the rotating blade rotates at too large an angle.
4. The novel concealed hinge according to claim 1, characterized in that: It also includes a hinge box. During assembly, the hinge box is pressed against the door frame by a fixing frame piece. As the second fixing bolt tightens the fixing frame piece, the hinge box is simultaneously fixed.