Expansion bolt with positioning mechanism

Abstract

The utility model discloses an expansion bolt with a positioning mechanism, belongs to the technical field of expansion bolts, and solves the problems that a positioning groove needs to be formed in a wall mounting hole in advance in an existing device, the bolt needs to be rotated forwards and backwards twice, and use is troublesome. A bolt is arranged in the threaded sleeve in a threaded and sleeved mode, expansion pieces distributed in an annular array mode are fixedly installed at the right end of the threaded sleeve, a self-tapping screw is fixedly installed in the middle of the left end of the bolt, the bolt and the self-tapping screw penetrate through an installed object and are screwed into the threaded sleeve, then the bolt is rotated, and in the process, the expansion pieces are screwed into the threaded sleeve, and the expansion pieces are screwed into the threaded sleeve. The self-tapping screw rotates along with the bolt and is drilled into the inner wall of the mounting hole, the left end of the bolt expands the expansion piece outwards, the bolt is further limited through the self-tapping screw, the situation that the bolt falls off due to external vibration is avoided, and a mounted object can be fixed only by rotating the bolt in one direction.

Description

Technical Field

[0001] This utility model relates to the field of expansion bolt technology, specifically to an expansion bolt with a positioning mechanism. Background Technology

[0002] Expansion bolts are mechanical fasteners used to fix objects to base materials (such as concrete, brick walls, etc.). Expansion bolts have the advantages of convenient and quick installation and can provide reliable connection strength. They are widely used in construction, machinery, power and other fields, such as installing doors and windows, air conditioner outdoor units, billboards, pipe supports, etc.

[0003] A search revealed that patent application number 202020894939.8 discloses an expansion bolt with a positioning mechanism, comprising an expansion shell and a wall. The wall has a positioning groove inside, a threaded rod passes through the expansion shell, a fixing block is sleeved on the outer wall of the threaded rod, a deformable block is fixedly installed on the outer wall of the expansion shell, a fixing seat is fixedly installed on the outer wall of the threaded rod, a connecting block is fixedly installed on the outer wall of the fixing seat, a rotating rod is fixedly installed on the outer wall of the connecting block, and a positioning screw is provided on the outer wall of the rotating rod.

[0004] Although the expansion bolt with positioning mechanism positions itself by aligning the positioning screw with the positioning groove, and then rotating the threaded rod can drive the positioning screw to rotate through the connecting block for installation, thus preventing misalignment during the installation of the expansion shell, the expansion bolt with positioning mechanism requires the positioning groove to be pre-cut inside the wall mounting hole and the bolt to be rotated twice in both directions, making it rather cumbersome to use.

[0005] Therefore, we propose an expansion bolt with a positioning mechanism. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides an expansion bolt with a positioning mechanism, which solves the problem that existing devices require pre-cut positioning grooves inside the wall mounting holes and require the bolt to be rotated twice, forward and backward, making them cumbersome to use.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: an expansion bolt with a positioning mechanism, including a threaded sleeve, a bolt being threaded inside the threaded sleeve, an expansion plate arranged in a ring array fixedly installed at the right end of the threaded sleeve, the expansion plate being arc-shaped, the thickness of the inner wall of the expansion plate gradually increasing from right to left, and a self-tapping screw fixedly installed at the middle of the left end of the bolt.

[0008] Preferably, four expansion plates are provided, and the inner wall of the right end of the four expansion plates smoothly transitions with the inner wall of the threaded sleeve, so as to facilitate the left end of the bolt to extend from the inside of the threaded sleeve and contact the inner wall of the expansion plate.

[0009] Preferably, the length of the self-tapping screw is the same as the length of the expansion piece, and the length of the threaded portion of the bolt is the same as the sum of the lengths of the threaded sleeve and the expansion piece. When the self-tapping screw is rotated and installed on the wall, the left end of the bolt is flush with the left end face of the expansion piece.

[0010] Preferably, the left end of the expansion piece is chamfered to facilitate insertion of the expansion piece into the mounting hole of the base material.

[0011] Preferably, a washer is fixedly fitted on the right end of the bolt, and an anti-slip groove is provided on the left end face of the washer in a circular array. The washer contacts the surface of the object to be installed, and the anti-slip groove can increase the friction between the washer and the object to be installed, so as to limit the bolt and prevent the bolt from rotating due to external vibration.

[0012] This utility model provides an expansion bolt with a positioning mechanism. It has the following beneficial effects:

[0013] 1. This expansion bolt with a positioning mechanism works by passing the bolt and self-tapping screw through the object to be installed and screwing them into the inside of the threaded sleeve. Then, the bolt is rotated. During this process, the self-tapping screw rotates with the bolt and drills into the inner wall of the mounting hole. The left end of the bolt contacts the inner wall of the expansion plate, which then pushes the expansion plate outward. This fixes the threaded sleeve and expansion plate in the mounting hole of the base material, thereby fixing the object to be installed on the base material. The self-tapping screw further limits the bolt, preventing it from falling off due to external vibration. The object can be fixed by rotating the bolt in one direction only. It is simple and convenient to use, solving the problem that existing devices require pre-cut positioning grooves inside the wall mounting hole and require rotating the bolt twice, which is more troublesome to use.

[0014] 2. The expansion bolt with positioning mechanism contacts the surface of the object being installed through a washer, and the anti-slip groove can increase the friction between the washer and the object being installed, so as to limit the bolt and prevent the bolt from rotating due to external vibration. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a side view of the structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the threaded sleeve and expansion plate structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the bolt and self-tapping screw structure of this utility model.

[0019] In the diagram: 1. Threaded sleeve; 2. Expansion plate; 3. Bolt; 4. Self-tapping screw; 5. Washer; 51. Anti-slip groove. Detailed Implementation

[0020] 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.

[0021] Example 1:

[0022] like Figure 1-4 As shown: The system includes a threaded sleeve 1, with a bolt 3 threaded inside the sleeve 1. An expansion plate 2, arranged in a circular array, is fixedly installed at the right end of the threaded sleeve 1. The expansion plate 2 is arc-shaped, and the thickness of its inner wall gradually increases from right to left. A self-tapping screw 4 is fixedly installed at the middle of the left end of the bolt 3. There are four expansion plates 2 in total. The inner wall of the right end of each expansion plate 2 smoothly transitions to the inner wall of the threaded sleeve 1. The length of the self-tapping screw 4 is the same as the length of the expansion plate 2. The length of the threaded portion of the bolt 3 is the same as the sum of the lengths of the threaded sleeve 1 and the expansion plate 2. The left end of the expansion plate 2 is chamfered. By connecting the bolt 3 and the self-tapping screw 4... The self-tapping screw 4 passes through the object to be installed and is screwed into the inside of the threaded sleeve 1. Then the bolt 3 is rotated. During this process, the self-tapping screw 4 rotates with the bolt 3 and drills into the inner wall of the mounting hole. The left end of the bolt 3 contacts the inner wall of the expansion plate 2, which then pushes the expansion plate 2 outward. This limits and fixes the threaded sleeve 1 and the expansion plate 2 in the mounting hole of the base material, thereby fixing the object to be installed on the base material. The self-tapping screw 4 further limits the bolt 3, preventing the bolt 3 from falling off due to external vibration. The object to be installed can be fixed by rotating the bolt 3 in one direction only. It is simple and convenient to use.

[0023] Example 2:

[0024] like Figure 1 , 2As shown in Figure 4: A washer 5 is fixedly fitted on the right end of the bolt 3. The left end face of the washer 5 has anti-slip grooves 51 arranged in a ring array. The washer 5 contacts the surface of the object to be installed, and the anti-slip grooves 51 can increase the friction between the washer 5 and the object to be installed, so as to limit the bolt 3 and prevent the bolt 3 from rotating due to external vibration.

[0025] The working principle and usage process of this utility model are as follows: When using this expansion bolt with a positioning mechanism, first insert the expansion plate 2 and the threaded sleeve 1 into the mounting hole opened on the base material. Then, the bolt 3 and the self-tapping screw 4 are passed through the object to be installed and screwed into the inside of the threaded sleeve 1. Then, the bolt 3 is rotated. During this process, the self-tapping screw 4 rotates with the bolt 3 and drills into the inner wall of the mounting hole. The left end of the bolt 3 contacts the inner wall of the expansion plate 2, which then pushes the expansion plate 2 outward. This limits and fixes the threaded sleeve 1 and the expansion plate 2 in the mounting hole of the base material, thereby fixing the object to be installed on the base material. Then, the washer 5 contacts the surface of the object to be installed, and the anti-slip groove 51 can increase the friction between the washer 5 and the object to be installed, so as to limit the bolt 3 and prevent the bolt 3 from rotating due to external vibration.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An expansion bolt having a positioning mechanism, characterized by: The utility model provides a threaded sleeve (1), the inside thread of threaded sleeve (1) is sleeved with bolt (3), the right end of threaded sleeve (1) is fixedly installed with the expansion sheet (2) of annular array distribution, the expansion sheet (2) is circular arc, the thickness of expansion sheet (2) inner wall gradually increases from right to left, the middle part of the left end of bolt (3) is fixedly installed with self tapping screw (4).

2. An expansion bolt having a positioning mechanism as claimed in claim 1 wherein: The expansion sheet (2) is provided with four, the inner wall of the right end of the four expansion sheet (2) and the inner wall of the threaded sleeve (1) are smoothly connected.

3. An expansion bolt having a positioning mechanism as claimed in claim 1 wherein: The length of the self tapping screw (4) is same with the length of the expansion sheet (2), the length of the threaded part of the bolt (3) is same with the sum of the length of the threaded sleeve (1) and the length of the expansion sheet (2).

4. The expansion bolt with a positioning mechanism according to claim 1, wherein: The left end of the expansion sheet (2) is chamfered.

5. The expansion bolt with a positioning mechanism according to claim 1, wherein: The right end of the bolt (3) is fixedly sleeved with the gasket (5), the left end surface of the gasket (5) is provided with the anti-skid groove (51) of annular array distribution.

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