The technical realization elements of the overhead structure of the anti-theft door to prevent the opening too large

Technical implementation elements:

3. In view of the deficiencies of the prior art, the utility model provides an anti-theft door aerial shaft structure that prevents excessive opening, which solves the lack of a limiting device for the anti-theft door aerial shaft at present. In daily use, the door opening size of the anti-theft door is Unable to control, it is easy to cause damage to the security door.

4. In order to achieve the above purpose, the present utility model is realized through the following technical solutions: a kind of anti-theft door antenna shaft structure that prevents the opening from being too large, including a fixing assembly, the top of the fixing assembly is fixedly installed with a connecting assembly, and the connecting One end of the assembly is internally rotatably connected with a rotating shaft, and the outside of the rotating shaft is fixedly installed with a limit assembly;

5. The limiting assembly includes a frame, a set of side walls of the frame is fixedly connected with a fixed clamp block, and another set of side walls of the frame is fixedly connected with a wire drum inside, and the inner surface of the wire drum rotates. A screw rod is connected, one end of the screw rod is outside and located inside the frame, a bearing is sleeved, the outside of the bearing is sleeved with a moving clamp block, and the other end of the screw rod is fixedly connected to the outside of the frame with a knob , the outer side of the frame is fixedly connected with a connecting block, and the bottom end of the connecting block is fixedly connected with a limiting column.

6. As a further technical solution of the present invention, the fixed clamp block and the movable clamp block have the same structure and the same size, and the inner surfaces of the fixed clamp block and the movable clamp block are respectively fitted with the outer surface of the rotating shaft.

7. As a further technical solution of the present invention, the fixing assembly includes a fixing piece, the bottom side of the fixing piece is symmetrically provided with several groups of first bolt holes, and the top end of the fixing piece is provided with two sets of second bolts. An expansion screw is connected through the inside of each group of the first bolt holes.

8. As a further technical solution of the present invention, the connecting assembly includes a connecting plate, the top of the connecting plate is provided with several groups of third bolt holes, and the other end of the connecting plate is fixedly connected with a hollow column through the inside, The top end of the connecting plate is positioned between several groups of third bolt holes and the hollow column with a limiting slot, and each group of the third bolt holes is connected with fastening bolts therethrough.

9. As a further technical solution of the present invention, the two groups of the second bolt holes are in a horizontal and vertical state with several groups of the third bolt holes, and the bottoms of the several groups of the fastening bolts pass through the two groups of the second bolt holes respectively. .

10. As a further technical solution of the present invention, the fixed clamp block and the movable clamp block are respectively located above the hollow column, the bottom of the limit column passes through the interior of the limit slot, and the limit column and the limit slot are located above the hollow column respectively. for sliding connections.

11. Beneficial effects

12. The present utility model provides an overhead structure of an anti-theft door that prevents the opening from being too large. Compared with the prior art, it has the following beneficial effects:

13.1. An anti-theft door antenna shaft structure that prevents excessive opening. By fitting the inner surface of the fixed clamp block with the outer surface of the rotating shaft, the bottom of the limit column passes through the interior of the limit slot to form a sliding connection, Rotate the knob to drive the screw to rotate, then the moving clamp block is moved toward the fixed clamp block through the thread cylinder, and then the fixed clamp block and the movable clamp block are fixedly connected with the rotating shaft, and the rotating shaft rotates while driving the limiter. The column slides inside the limit slot, and the maximum opening size of the anti-theft door can be obtained from the size of the limit slot.

14.2. An anti-theft door overhead structure that prevents the opening from being too large. By using several sets of fastening bolts to pass through the interior of several sets of third bolt holes and two sets of second bolt holes, the fixing member and the connecting plate form a fixed structure. Since the two sets of second bolt holes are in a horizontal and vertical state with several groups of third bolt holes, when the fixing piece and the connecting plate are connected, the fixing piece and the connecting plate can be moved forward, backward, leftward and backward. Right for fine movement adjustment.

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