Expansion bolt assembly

Abstract

An expansion bolt assembly, by setting a separation groove and a convex rib on the expansion end of the expansion bolt, when the screw is tightened, one end of the screw presses the convex rib, so that the expansion part is supported away from the axis of the expansion groove under the action of the convex rib, thereby realizing the fixing effect of the expansion bolt. This design not only improves the fixing stability of the expansion bolt, but also makes the expansion bolt more evenly disperse the pressure when stressed, avoiding damage caused by excessive local stress.

Description

Technical Field

[0001] This utility model relates to the field of bolt technology, and specifically to an expansion bolt assembly. Background Technology

[0002] In the existing technology, expansion bolts often loosen or fall off during use due to uneven force or unstable fixation, causing great inconvenience to users. Summary of the Invention

[0003] In view of this, the present invention provides an expansion bolt assembly.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An expansion bolt assembly includes an expansion bolt and a screw. The expansion bolt has an expansion groove and an expansion end. The expansion groove extends to the expansion end and passes through the expansion bolt. The expansion end has a plurality of equally spaced partition grooves that divide the expansion end into a plurality of expansion portions. The inner wall of each expansion portion has a rib extending along its length. One end of the screw extends into the expansion groove and connects to the expansion bolt. One end of the screw presses against the rib to push the expansion portion away from the central axis of the expansion groove.

[0006] Preferably, the expansion bolt has a body portion, the rib extends from the expansion portion to the inner wall of the body portion, the inner diameter of the expansion groove located in the body portion is larger than the nominal inner diameter of the expansion groove located in the expansion end, and the inner wall of the expansion portion is provided with an inclined structure.

[0007] Preferably, the inner wall of the expansion portion is inclined in the direction of the central axis of the side of the expansion portion closer to the main body portion toward the side of the expansion portion farther from the main body portion.

[0008] Preferably, the cross-sectional shape of the rib is triangular, the rib has a rib inclined surface that connects with the screw, and the rib inclined surface is inclined in the direction of the central axis of the expansion part from the side where the rib inclined surface connects with the inner wall of the expansion groove.

[0009] Preferably, the screw has a tightening end and a fastening end, the fastening end being conical and the tightening end being disc-shaped.

[0010] Preferably, the outer surface of the expansion portion protrudes to form a limiting structure, and the limiting structure is arranged in a conical shape.

[0011] The beneficial effects of this invention are as follows: By setting a dividing groove and a raised rib at the expansion end of the expansion bolt, when the screw is tightened, one end of the screw presses against the raised rib, causing the expansion part to expand away from the central axis of the expansion groove under the action of the raised rib, thereby achieving the fixing effect of the expansion bolt. This design not only improves the fixing stability of the expansion bolt, but also allows the expansion bolt to distribute pressure more evenly when under force, avoiding damage caused by excessive local force. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0013] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Appendix Figure 2 For the appendix Figure 1 Top view;

[0015] Appendix Figure 3 For the appendix Figure 2 Sectional view at point AA;

[0016] Appendix Figure 4 This is a schematic diagram of the assembly of expansion bolts and screws. Detailed Implementation

[0017] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] The present invention will now be further described with reference to the accompanying drawings.

[0019] This utility model provides the following technical solution:

[0020] As attached Figure 1-4As shown, this utility model discloses an expansion bolt assembly, including an expansion bolt 1 and a screw 2. The expansion bolt 1 has an expansion groove 3 and an expansion end 4. The expansion groove 3 extends to the expansion end 4 and penetrates the expansion bolt 1. The expansion end 4 has several equally spaced partition grooves 5, which divide the expansion end 4 into several expansion portions 6. The inner wall of each expansion portion 6 has a raised rib 7 extending along its length. One end of the screw 2 extends into the expansion groove 3 and connects to the expansion bolt 1. The screw 2 presses against the raised rib 7, causing the expansion portions 6 to expand away from the central axis of the expansion groove 3. Specifically, in this design, by providing partition grooves 5 and raised ribs 7 at the expansion end 4 of the expansion bolt 1, when the screw 2 is tightened, one end of the screw 2 presses against the raised rib 7, causing the expansion portions 6 to expand away from the central axis of the expansion groove 3 under the action of the raised rib 7, thereby achieving the fixing effect of the expansion bolt 1. This design not only improves the fixing stability of the expansion bolt 1, but also enables the expansion bolt 1 to distribute pressure more evenly when under stress, avoiding damage caused by excessive local stress.

[0021] Furthermore, the expansion bolt 1 has a body portion 8, and the rib 7 extends from the expansion portion 6 to the inner wall of the body portion 8. The inner diameter of the expansion groove 3 within the body portion 8 is larger than the nominal inner diameter of the expansion groove 3 within the expansion end 4. The inner wall of the expansion portion 6 is arranged with an inclined structure. Specifically, in this embodiment, the rib 7 extends from the expansion portion 6 to the inner wall of the body portion 8, so that during the tightening process, the screw 2 can not only open the expansion portion 6 but also exert a certain amount of pressure on the body portion 8, thereby enhancing the friction between the expansion bolt 1 and the mounting hole wall and further improving the fixing effect of the expansion bolt 1. At the same time, the inner diameter of the expansion groove 3 within the body portion 8 is larger than the nominal inner diameter of the expansion groove 3 within the expansion end 4. This design makes it easier for the expansion bolt 1 to enter the mounting hole during installation, and when tightening the screw 2, the expansion portion 6 can more smoothly open away from the central axis of the expansion groove 3. In addition, the inner wall of the expansion part 6 is set with an inclined structure. This design not only makes the expansion part 6 more uniform when it is expanded, but also allows the expansion bolt 1 to better adapt to the shape of the mounting hole when under force, thereby improving the applicability and fixing stability of the expansion bolt 1.

[0022] Furthermore, the inner wall of the expansion portion 6 is inclined in the direction of its central axis, from the side of the expansion portion 6 closest to the main body 8 towards the side of the expansion portion 6 furthest from the main body 8. Specifically, in this embodiment, the inclined design of the inner wall of the expansion portion 6 allows it to fit more closely to the mounting hole wall when expanded, increasing the contact area between the expansion bolt 1 and the mounting hole wall, thereby further improving the fixing effect and stability of the expansion bolt 1. In addition, this inclined design also makes the installation of the expansion bolt 1 smoother, reducing resistance during the installation process and improving installation efficiency. At the same time, the inclined inner wall structure can better distribute the force, avoiding damage caused by excessive local force and extending the service life of the expansion bolt 1.

[0023] Furthermore, the cross-sectional shape of the rib 7 is triangular, and the rib 7 has an inclined surface that connects with the screw 2. The inclined surface of the rib 7 is inclined towards the central axis of the expansion part 6 from the side where the inclined surface of the rib 7 connects with the inner wall of the expansion groove 3 on the main body 8. Specifically, in this embodiment, the triangular cross-sectional design of the rib 7 not only enhances the structural strength of the rib 7, but also allows the rib 7 to better distribute the force to the inner wall of the expansion part 6 when under stress. This design improves the compressive strength of the expansion part 6, making the expansion bolt 1 more stable under stress. At the same time, the inclined surface of the rib 7 is inclined towards the central axis of the expansion part 6 from the side where the inclined surface of the rib 7 connects with the inner wall of the main body 8. This design allows the screw 2 to more smoothly press the rib 7 during tightening, pushing the expansion part 6 away from the central axis of the expansion groove 3.

[0024] Furthermore, the screw 2 has a tightening end 9 and a fastening end 10. The fastening end 10 is conical, and the tightening end 9 is disc-shaped. Specifically, in this embodiment, the fastening end 10 of the screw 2 is conical. This design allows the screw 2 to more easily enter the expansion groove 3 during tightening. As the screw 2 is tightened, the conical fastening end 10 gradually presses against the rib 7, thereby expanding the expansion portion 6. Simultaneously, the disc-shaped tightening end 9 not only facilitates the user's tightening of the screw 2 but also increases the contact area between the screw 2 and the expansion bolt 1, improving the tightening effect and stability of the screw 2.

[0025] Furthermore, a limiting structure 11 protrudes from the outer surface of the expansion portion 6, and the limiting structure 11 is conical in shape. Specifically, in this embodiment, the conical limiting structure 11 can better adapt to the shape of the mounting hole, increasing the contact area between the expansion bolt 1 and the wall of the mounting hole, thereby further improving the fixing effect and stability of the expansion bolt 1. At the same time, the limiting structure 11 can also play a guiding role, allowing the expansion bolt 1 to enter the mounting hole more smoothly during installation, reducing resistance and time during the installation process, and improving installation efficiency.

[0026] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An expansion bolt assembly, comprising an expansion bolt and a screw, wherein the expansion bolt has an expansion groove, the expansion bolt has an expansion end, the expansion groove extends to the expansion end and penetrates the expansion bolt, and the expansion end has a plurality of equally spaced partition grooves, the partition grooves dividing the expansion end into a plurality of expansion portions, characterized in that: The inner wall of the expansion part has a raised rib along the length of the expansion part. One end of the screw extends into the expansion groove and is connected to the expansion bolt. One end of the screw presses against the raised rib to push the expansion part away from the central axis of the expansion groove.

2. The expansion bolt assembly according to claim 1, characterized in that: The expansion bolt has a body portion, the rib extends from the expansion portion to the inner wall of the body portion, the inner diameter of the expansion groove located in the body portion is larger than the nominal inner diameter of the expansion groove located in the expansion end, and the inner wall of the expansion portion is arranged in an inclined structure.

3. The expansion bolt assembly according to claim 2, characterized in that: The inner wall of the expansion section is inclined in the direction of the central axis from the side of the expansion section closer to the main body to the side of the expansion section farther from the main body.

4. The expansion bolt assembly according to claim 2, characterized in that: The cross-sectional shape of the rib is triangular, and the rib has a rib inclined surface that connects with the screw. The rib inclined surface is inclined in the direction of the central axis of the expansion part from the side where the rib inclined surface connects with the inner wall of the expansion groove.

5. The expansion bolt assembly according to claim 1, characterized in that: The screw has a tightening end and a fastening end, the fastening end being conical and the tightening end being disc-shaped.

6. The expansion bolt assembly according to claim 1, characterized in that: The expansion portion protrudes outward to form a limiting structure, which is cone-shaped.

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