A type of ceiling expansion screw

Abstract

A ceiling expansion screw includes a screw rod, an expansion tube, and an expansion head. The screw rod comprises a hexagonal connecting part, a cylindrical support part, and a screw section connected sequentially from bottom to top. The bottom of the hexagonal connecting part has a first threaded hole. The expansion tube is sleeved on the outer periphery of the screw section, and the bottom surface of the expansion tube abuts against the top surface of the cylindrical support part. The expansion head has a second threaded hole that extends vertically. The top of the screw section is threadedly connected to the second threaded hole. The bottom of the expansion head is pressed tightly against the top of the expansion tube. The outer diameter of the expansion head gradually increases from bottom to top. When the expansion head descends, it drives the expansion tube to expand. The outer periphery of the expansion tube has multiple anti-pull protrusions. This product is inserted into a pre-drilled hole in the ceiling. Then, the hexagonal connecting part is rotated. As the hexagonal connecting part rotates, the expansion head descends and expands the expansion tube, which then hooks onto the inner wall of the hole.

Description

Technical Field

[0001] This utility model relates to the field of hardware accessories, specifically to a ceiling expansion screw. Background Technology

[0002] Expansion bolts are commonly used fasteners in construction. Existing expansion bolts typically include a bolt, expansion tube, washer, and hexagonal nut. For ceiling installations, a complete set can have up to seven components. During installation, the expansion tube is a cylindrical tube with multiple slits around its outer circumference. Installation involves drilling holes in the wall, inserting the expansion bolt into the holes, and finally tightening the hexagonal nut with a wrench. As the nut tightens, the expansion tube expands under pressure, allowing its tail to hook onto the wall. However, existing ceiling expansion bolts have many components, making them somewhat cumbersome to use, especially for workers operating at heights. Utility Model Content

[0003] This utility model provides a ceiling expansion screw, the main purpose of which is to overcome the problems of existing ceiling expansion screws having many accessories and being inconvenient to operate.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An expansion bolt for ceiling installation includes a screw, an expansion tube, and an expansion head. The screw includes a hexagonal connecting part, a cylindrical support part, and a screw section connected sequentially from bottom to top. The bottom of the hexagonal connecting part has a first threaded hole. The expansion tube is sleeved on the outer periphery of the screw section, and the bottom surface of the expansion tube abuts against the top surface of the cylindrical support part. The expansion head has a second threaded hole that runs vertically through the screw section. The top of the screw section is threadedly connected to the second threaded hole. The bottom of the expansion head is pressed tightly against the top of the expansion tube. The outer diameter of the expansion head gradually increases from bottom to top. When the expansion head descends, it drives the expansion tube to expand. The outer periphery of the expansion tube has multiple anti-pull protrusions.

[0005] Furthermore, the upper outer periphery of the detonating tube is provided with multiple grooves and multiple slits, each groove corresponding to a slit, and the corresponding grooves and slits are connected. The multiple grooves divide the upper part of the detonating tube into multiple expansion plates, and the anti-pull protrusion is provided on the expansion plates.

[0006] Furthermore, the anti-pull protrusion includes a first anti-pull protrusion and a second anti-pull protrusion arranged vertically.

[0007] Furthermore, the outer periphery of the pull head is provided with multiple grooves, and teeth are formed between two adjacent grooves.

[0008] As can be seen from the above description of this utility model, compared with the prior art, this utility model has the following advantages: During ceiling installation, the threaded rod is first pre-connected to the first threaded hole. Then, the screw section, expansion tube, and expansion head of this utility model are tightly inserted into the pre-drilled hole in the ceiling. Next, the hexagonal connecting part is rotated. Because the cylindrical support part abuts against the ceiling, the screw can only rotate and cannot move upwards when the hexagonal connecting part rotates. As the hexagonal connecting part rotates, the expansion head descends and expands the expansion tube. After the expansion tube expands, it hooks onto the inner wall of the hole. The anti-pull protrusion increases the gripping force between the expansion tube and the inner wall of the hole after the expansion tube expands. This utility model has a simpler structure, consisting of only three parts, making operation more convenient and greatly shortening the operator's time. Attached Figure Description

[0009] Figure 1 This is a structural diagram of the present invention.

[0010] Figure 2 This is a structural diagram of the present invention from another angle.

[0011] Figure 3 This is an exploded view of the structure of this utility model. Detailed Implementation

[0012] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0013] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0014] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0015] Reference Figures 1 to 3 An expansion bolt for ceiling installation includes a screw 1, an expansion tube 2, and an expansion head 3. The screw 1 comprises a hexagonal connecting part 11, a cylindrical support part 12, and a screw section 13 connected sequentially from bottom to top. The hexagonal connecting part 11, cylindrical support part 12, and screw section 13 are integrally formed. The bottom of the hexagonal connecting part 11 has a first threaded hole 14. The expansion tube 2 is sleeved on the outer periphery of the screw section 13, with its bottom surface abutting against the top surface of the cylindrical support part 12. The expansion head 3 has a second threaded hole 31 that extends vertically. The top of the screw section 13 is threadedly connected to the second threaded hole 31, and the bottom of the expansion head 3 is pressed tightly against the top of the expansion tube 2. The outer diameter of the expansion head 3 gradually increases from bottom to top. When the expansion head 3 descends, it drives the expansion tube 2 to expand. The outer periphery of the expansion tube 2 has multiple anti-pull protrusions 21.

[0016] Reference Figures 1 to 3 The upper outer periphery of the detonating tube 2 is provided with three grooves 22 and three slits 23. Each groove 22 corresponds to one slit 23, and the corresponding grooves 22 and slits 23 are connected. The three grooves 22 divide the upper part of the detonating tube 2 into three expansion plates 24. The anti-pull protrusions 21 are provided on the expansion plates 24. The anti-pull protrusions 21 include a first anti-pull protrusion 25 and a second anti-pull protrusion 26 arranged vertically. When the detonating head 3 descends, it expands the three expansion plates 24 outward. The slits 23 make it easier for the expansion plates 24 to expand outward.

[0017] Reference Figure 1 The outer periphery of the detonator 3 is provided with a plurality of grooves 32, and a tooth 33 is formed between two adjacent grooves 32. The tooth 33 has an anti-slip function and can increase the friction between the detonator and the inner wall of the tube 2.

[0018] Reference Figures 1 to 3During ceiling installation, the threaded rod is first pre-connected to the first threaded hole 14. Then, the screw section 13, the expansion tube 2, and the expansion head 3 of this utility model are inserted into the pre-drilled hole in the ceiling. Next, the hexagonal connecting part 11 is rotated. Since the cylindrical support part 12 is in contact with the ceiling, the screw 1 can only rotate and cannot move upward when the hexagonal connecting part 11 is rotated. As the hexagonal connecting part 11 rotates, the expansion head 3 will descend and expand the three expansion plates 24 of the expansion tube 2. After the three expansion plates 24 expand, they will hook onto the inner wall of the hole. The anti-pull protrusion 21 can increase the gripping force between the expansion plates 24 and the inner wall of the hole after the expansion plates 24 expand.

[0019] The above are merely specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A ceiling expansion screw, characterized by: The device includes a screw, a detonating tube, and a detonating head. The screw comprises a hexagonal connecting part, a cylindrical support part, and a screw section connected sequentially from bottom to top. The bottom of the hexagonal connecting part has a first threaded hole. The detonating tube is sleeved on the outer periphery of the screw section, and the bottom surface of the detonating tube abuts against the top surface of the cylindrical support part. The detonating head has a second threaded hole that runs vertically through the screw section. The top of the screw section is threadedly connected to the second threaded hole. The bottom of the detonating head is pressed tightly against the top of the detonating tube. The outer diameter of the detonating head gradually increases from bottom to top. When the detonating head descends, it drives the detonating tube to expand. The outer periphery of the detonating tube has multiple anti-pull protrusions.

2. A ceiling expansion screw as claimed in claim 1 wherein: The upper outer periphery of the detonating tube is provided with multiple grooves and multiple slits, each groove corresponding to a slit, and the corresponding grooves and slits are connected. The multiple grooves divide the upper part of the detonating tube into multiple expansion plates, and the anti-pull protrusion is provided on the expansion plate.

3. A ceiling expansion screw as defined in claim 1, wherein: The anti-pull protrusion includes a first anti-pull protrusion and a second anti-pull protrusion arranged vertically.

4. A ceiling expansion screw as defined in claim 1, wherein: The outer periphery of the tear head is provided with multiple grooves, and teeth are formed between two adjacent grooves.

Images