Quick-mounting support anchor bolt

Abstract

The utility model discloses a kind of fast mounting support anchor bolt, including anchor bolt body, expansion sleeve is set in anchor bolt body, expansion sleeve is made of multiple arc petals distributed along circumference, and gripping surface is set on arc petal, and arc petal has first working state and second working state;In first working state, arc petal is displaced towards the central axis direction of expansion sleeve, so that gripping surface is gathered;In second working state, arc petal is expanded towards the inner wall direction of anchor bolt body;When expansion sleeve is subjected to force along its axial direction, arc petal can be switched from first working state to second working state, and again switched from second working state to first working state.The utility model has the effect of improving the installation speed of bolt and anchor bolt, and saving artificial cost.

Description

Technical Field

[0001] This utility model relates to the field of building fastening technology, and in particular to a quick-install bracket anchor bolt. Background Technology

[0002] In the fields of electromechanical installation, fire protection engineering, and building decoration, it is often necessary to fix various supports, pipelines, and other equipment to concrete ceilings or walls. Currently, a type of pre-embedded internal thread anchor is widely used, and its standard installation process is as follows: First, the pre-embedded anchor body is driven into a pre-drilled hole, and then the component to be installed is screwed into the internal thread of the pre-embedded part with a bolt.

[0003] The aforementioned traditional threaded connection method has obvious efficiency bottlenecks. During the bolt screwing process, construction workers must perform multiple turns and continuous rotations until the bolt is securely connected to the embedded anchor body. Moreover, in projects that require the installation of a large number of supports and anchors, each installation point requires multiple turns and continuous rotations of the bolt. This process accumulates and consumes a lot of time and manpower. In addition, when working in confined spaces or at heights, it is very inconvenient to use tools to perform multiple turns, further reducing construction efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a quick-install bracket anchor bolt that improves the installation speed of bolts and anchor bolts and saves labor costs.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a quick-install bracket anchor bolt, including an anchor bolt body, an expansion sleeve is provided inside the anchor bolt body, the expansion sleeve is composed of a plurality of arc-shaped lobes distributed along the circumference, the arc-shaped lobes are provided with a clamping surface, and the arc-shaped lobes have a first working state and a second working state. In the first working state, the arc-shaped petals move toward the central axis of the expansion sleeve, causing the clamping surfaces to converge; in the second working state, the arc-shaped petals expand toward the inner wall of the anchor bolt body. When the expansion sleeve is subjected to a force along its axial direction, the arc-shaped flap can switch from the first working state to the second working state, and then switch back from the second working state to the first working state.

[0006] By adopting the above technical solution, the bolt only needs to be "inserted" to complete the fixation with the anchor body, which can improve the installation speed of bolts and anchors and save labor costs.

[0007] A further feature of this invention is that the inner wall of the arc-shaped petal is provided with arc-shaped locking teeth, which are distributed in an array at intervals and form the clamping surface.

[0008] By adopting the above technical solution, the contact area and friction between the bolt and the arc-shaped flap are increased, effectively preventing slippage or loosening, and improving the anchor's gripping force and shear strength, so that it can remain stable and fixed under vibration or load change environment.

[0009] A further feature of this invention is that a guiding mechanism is provided within the anchor bolt body, which guides the arc-shaped flaps to be close to or away from the central axis of the expansion sleeve.

[0010] A further feature of this invention is that the guiding mechanism includes an annular inclined surface located within the anchor bolt body, the annular inclined surface being inclined toward the central axis of the anchor bolt body, and in the first working state, the arc-shaped petals abut against the annular inclined surface.

[0011] By adopting the above technical solution, the arc-shaped flap can switch between the first working state and the second working state, and the smoothness and accuracy of the state switching are ensured.

[0012] A further feature of this invention is that a return spring is abutted at the end of the expansion sleeve away from the bolt insertion end, and the return spring causes the expansion sleeve to tend to approach the annular inclined surface.

[0013] By adopting the above technical solution, it is ensured that the arc-shaped flap can automatically return from the second working state to the first working state, and can be continuously supported on the arc-shaped flap, so that the arc-shaped flap maintains the clamping force with the bolt, ensuring the fixing effect of the arc-shaped flap and the bolt.

[0014] A further feature of this invention is that a support ring is provided at the end of the return spring away from the expansion sleeve, and the support ring is assembled on the anchor bolt body.

[0015] By adopting the above technical solution, a stable and reliable support point is provided for the return spring, which not only enables the return spring to perform its rebound function normally, but also prevents the return spring from deflecting or twisting when subjected to force.

[0016] A further feature of this invention is that the anchor bolt body is provided with a limiting groove for accommodating the support ring, and the limiting groove restricts the displacement path of the support ring along its axial direction.

[0017] By adopting the above technical solution, the support ring is accurately positioned and constrained, preventing it from coming off or shifting during operation, and ensuring that the return spring always works effectively within the predetermined range.

[0018] A further feature of this invention is that the anchor bolt body has an installation portion formed along the bolt insertion end direction, the installation portion has a groove, and an installation fitting is engaged in the groove.

[0019] By adopting the above technical solution, the installation fitting can be reliably connected to the anchor bolt body, which facilitates the fixing of equipment such as brackets and pipelines to the installation fitting.

[0020] A further feature of this invention is that an anti-rotation block is fixedly provided on the inner wall of the anchor bolt body, and in the first working state, the anti-rotation block is engaged with the arc-shaped petal.

[0021] By adopting the above technical solution, the rotation of the arc-shaped petals following the bolts during the state switching process is effectively prevented, thus ensuring the fixing effect between the bolts and the arc-shaped petals.

[0022] A further feature of this invention is that a groove is provided circumferentially at one end of the arc-shaped petal near the anti-rotation block, and the anti-rotation block is engaged with the groove or the arc-shaped petal.

[0023] By adopting the above technical solution, not only is it effective to prevent the arc-shaped petals from rotating with the bolts during the state switching process, but it also ensures the fixing effect between the bolts and the arc-shaped petals.

[0024] In summary, this utility model has the following beneficial effects: An expansion sleeve is installed inside the anchor bolt body. The expansion sleeve consists of two circumferentially distributed arc-shaped lobes. The inner wall of the arc-shaped lobes is provided with a clamping surface. The arc-shaped lobes have a first working state and a second working state. In the first working state, the arc-shaped lobes move towards the central axis of the expansion sleeve, causing the clamping surface to converge. In the second working state, the arc-shaped lobes expand towards the inner wall of the anchor bolt body. When the expansion sleeve is subjected to a force along its axial direction, the arc-shaped lobes can switch from the first working state to the second working state and then switch back from the second working state to the first working state. The bolt only needs to be "inserted" to complete the fixation with the anchor bolt body. This has the effect of improving the installation speed of bolts and anchor bolts and saving labor costs. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present invention.

[0026] Figure 2 This is a side view of the present invention.

[0027] Figure 3 This is an exploded view of this utility model.

[0028] Figure 4 This is a cross-sectional view of the arc-shaped flap of this utility model in its first working state.

[0029] Figure 5 This is a cross-sectional view of the arc-shaped flap of this utility model in its second working state.

[0030] Figure 6 This is a cross-sectional view of the anti-rotation block and the arc-shaped petals of this utility model in the engaged state.

[0031] In the diagram: 1. Anchor bolt body; 11. Limiting groove; 12. Mounting part; 121. Groove; 13. Anti-rotation block; 2. Expansion sleeve; 21. Arc-shaped petal; 211. Arc-shaped retaining tooth; 212. Retaining groove; 3. Annular inclined surface; 4. Return spring; 5. Support ring; 6. Mounting mating part; 61. Fixing part; 611. Lug; 612. Insert; 62. Mating part; 7. Gasket. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] A type of quick-install bracket anchor, such as Figure 1-6 As shown, the device includes an anchor bolt body 1, which is a hollow cylindrical shape. An expansion sleeve 2 is disposed inside the anchor bolt body 1. The expansion sleeve 2 is composed of two circumferentially distributed arc-shaped petals 21. It should be noted that this invention does not limit the number of arc-shaped petals 21; the above and following description uses two as an example only to more clearly illustrate the solution. A clamping surface is provided on the inner wall of the arc-shaped petals 21, and the arc-shaped petals 21 have a first working state and a second working state. In the first working state, the arc-shaped petals 21 are displaced toward the central axis of the expansion sleeve 2, causing the clamping surfaces to converge; in the second working state, the arc-shaped petals 21 expand toward the inner wall of the anchor bolt body 1. When the expansion sleeve 2 is subjected to an axial force, the arc-shaped flaps 21 can switch from the first working state to the second working state, and then switch back from the second working state to the first working state. That is, the bolt is inserted into the anchor body 1 and abuts against the end face of the expansion sleeve 2. At this time, the arc-shaped flaps 21 are close together in the first working state, with a relatively small diameter. Continuous force causes the arc-shaped flaps 21 of the expansion sleeve 2 to separate, thus forming the second working state of the arc-shaped flaps 21. The expansion sleeve 2 expands, increasing its diameter, allowing the bolt to be inserted between the arc-shaped flaps 21. After the bolt enters between the arc-shaped flaps 21, the arc-shaped flaps 21 retract, locking the bolt and fixing it in the anchor body 1, thus returning to the first working state. Through this structural design, the bolt only needs to be "inserted" to complete the fixation to the anchor body 1, which improves the installation speed of bolts and anchors and saves labor costs.

[0034] Preferably, the inner wall of the arc-shaped petal 21 is provided with arc-shaped retaining teeth 211. The arc-shaped retaining teeth 211 are distributed in an array at intervals and form the clamping surface. The arc-shaped retaining teeth 211 are adapted to the thread of the bolt. When the arc-shaped petal 21 switches from the second working state back to the first working state, the arc-shaped retaining teeth 211 engage with the thread on the bolt, so that the bolt is fixed. Through the above structural design, the contact area and friction between the bolt and the arc-shaped petal 21 are increased, effectively preventing slippage or loosening, improving the gripping force and shear strength of the anchor bolt, and enabling it to remain stably fixed under vibration or load change environments.

[0035] Preferably, the anchor body 1 is provided with a guide mechanism, which guides the arc-shaped flap 21 to be close to or away from the central axis of the expansion sleeve 2.

[0036] Preferably, the guiding mechanism includes an annular inclined surface 3 on the inner wall of the anchor bolt body 1. The annular inclined surface 3 is inclined toward the central axis of the anchor bolt body 1. By setting the annular inclined surface 3, the inner diameter of the anchor bolt body 1 gradually extends from the end near the bolt insertion end toward the arc-shaped flap 21, as shown in the attached figure. Figure 1 As shown, A represents the direction of the bolt insertion end. In the first working state, the arc-shaped petal 21 abuts against the annular inclined surface 3. By setting the annular inclined surface 3, the arc-shaped petal 21 can switch between the first and second working states, ensuring the smoothness and accuracy of the state switching.

[0037] Preferably, a return spring 4 is abutted at the end of the expansion sleeve 2 away from the bolt insertion end. The return spring 4 causes the expansion sleeve 2 to tend to approach the annular inclined surface 3. By setting the return spring 4, it is ensured that the arc-shaped flap 21 can automatically return from the second working state to the first working state, and can be continuously held against the arc-shaped flap 21, so that the arc-shaped flap 21 maintains the clamping force with the bolt, ensuring the fixing effect between the arc-shaped flap 21 and the bolt.

[0038] Preferably, a support ring 5 is provided at the end of the return spring 4 away from the expansion sleeve 2, and the support ring 5 is assembled on the anchor bolt body 1. By providing the support ring 5, a stable and reliable support point is provided for the return spring 4, which not only enables the return spring 4 to perform its rebound function normally, but also prevents the return spring 4 from deflecting or twisting when subjected to force.

[0039] Preferably, a limiting groove 11 is provided on the inner wall of the anchor bolt body 1 at the end opposite to the bolt insertion end to accommodate the support ring 5. The limiting groove 11 restricts the displacement path of the support ring 5 along its axial direction. By setting the limiting groove 11, precise positioning and constraint of the support ring 5 are achieved, preventing the support ring 5 from dislodging or shifting during operation, and ensuring that the return spring 4 always works effectively within the predetermined range.

[0040] Preferably, the anchor bolt body 1 has a mounting portion 12 formed along the bolt insertion end direction, and the outer wall of the mounting portion 12 has a groove 121 circumferentially formed, on which a mounting fitting 6 is engaged. Through the above structural design, the mounting fitting 6 is reliably connected to the anchor bolt body 1, thereby facilitating the fixing of supports, pipelines and other equipment to the mounting fitting 6. In a preferred embodiment, the mounting fitting 6 includes a fixing part 61 that engages with the groove 121 and a fitting part 62. The fitting part 62 extends away from the anchor bolt body 1 and is used to fix and connect external parts. The fixing part 61 includes lugs 611 disposed opposite to each other on both sides of the groove 121 and inserts 612 connected to the lugs 611. The lugs 611 fit the contour of the groove 121 and are inserted into both sides of the groove 121. The inserts 612 are W-shaped, with one end inserted into the other side of the groove 121 and located between the two lugs 611, and the other end connected to the fitting part 62. The lugs 611, inserts 612, and fitting part 62 are integrally formed. Through the above design, the connection between the mounting fitting 6 and the mounting part 12 is more secure.

[0041] Preferably, an anti-rotation block 13 is fixedly provided on the inner wall of the anchor bolt body 1. The anti-rotation block 13 is located on the annular inclined surface 3, and is a wedge-shaped block that protrudes towards the arc-shaped petal 21. In the first working state, the anti-rotation block 13 is engaged with the arc-shaped petal 21. By providing the anti-rotation block 13, the arc-shaped petal 21 is effectively prevented from rotating with the bolt during state switching, ensuring the fixing effect between the bolt and the arc-shaped petal 21.

[0042] Preferably, the arc-shaped petal 21 near the anti-rotation block 13 has a circumferentially formed groove 212, which is a serrated groove that matches the size of the anti-rotation block 13. In one preferred embodiment, the anti-rotation block 13 is engaged between the arc-shaped petals 21, that is, when the arc-shaped petals 21 are in the first working state, the anti-rotation block 13 is engaged between the arc-shaped petals 21, so that the arc-shaped petals 21 cannot rotate due to the obstruction of the anti-rotation block 13 and the inner wall of the anchor bolt body 1. In another preferred embodiment, the anti-rotation block 13 is engaged with the groove 212, that is, when the bolt pushes open the arc-shaped petals 21, if the arc-shaped petals 21 rotate slightly, after the arc-shaped petals 21 retract to the first working state, the anti-rotation block 13 can also engage with the groove 212 on the arc-shaped petals 21, so that the arc-shaped petals 21 cannot rotate due to the obstruction of the anti-rotation block 13 and the inner wall of the anchor bolt body 1. The above structural design effectively prevents the arc-shaped petal 21 from rotating with the bolt during state switching, ensuring the fixing effect between the bolt and the arc-shaped petal 21.

[0043] In a preferred embodiment, a washer 7 is provided at one end of the return spring 4 near the expansion sleeve 2 and at the other end near the support ring 5. The return spring 4 abuts against the expansion sleeve 2 and the support ring 5 respectively through the washer 7, preventing the return spring 4 from deflecting or twisting when subjected to force. This protects the return spring 4, extends its service life, and ensures that the spring force is evenly transmitted to the expansion sleeve 2.

[0044] The basic working principle of this utility model is as follows: The bolt is inserted into the anchor body 1 and abuts against the end face of the expansion sleeve 2. At this time, the arc-shaped petals 21 are gathered together in the first working state, and their diameter is relatively small. Continuous force is applied to separate the arc-shaped petals 21 of the expansion sleeve 2 and compress the return spring 4, thereby forming the second working state of the arc-shaped petals 21. The expansion sleeve 2 expands to increase its diameter, so that the bolt can be inserted between the arc-shaped petals 21. After the bolt enters between the arc-shaped petals 21, under the action of the return spring 4, the arc-shaped petals 21 retract and lock the bolt, so that the bolt is fixed in the anchor body 1, thereby forming the first working state again.

[0045] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A quick-install bracket anchor bolt, comprising an anchor bolt body (1), characterized in that: An expansion sleeve (2) is provided inside the anchor body (1). The expansion sleeve (2) is composed of multiple arc-shaped petals (21) distributed along the circumference. The arc-shaped petals (21) are provided with a clamping surface. The arc-shaped petals (21) have a first working state and a second working state. In the first working state, the arc-shaped petal (21) moves toward the central axis of the expansion sleeve (2) to bring the clamping surface together; in the second working state, the arc-shaped petal (21) expands toward the inner wall of the anchor bolt body (1); When the expansion sleeve (2) is subjected to a force along its axial direction, the arc-shaped flap (21) can switch from the first working state to the second working state, and then switch back from the second working state to the first working state.

2. The quick-install bracket anchor bolt according to claim 1, characterized in that: The inner wall of the arc-shaped petal (21) is provided with arc-shaped locking teeth (211), which are arranged in an array at intervals and form the clamping surface.

3. The quick-install bracket anchor bolt according to claim 1, characterized in that: The anchor body (1) is provided with a guide mechanism, which guides the arc-shaped flap (21) to be close to or away from the central axis of the expansion sleeve (2).

4. The quick-install bracket anchor bolt according to claim 3, characterized in that: The guiding mechanism includes an annular inclined surface (3) located inside the anchor body (1). The annular inclined surface (3) is inclined toward the central axis of the anchor body (1). In the first working state, the arc-shaped petal (21) abuts against the annular inclined surface (3).

5. The quick-install bracket anchor bolt according to claim 4, characterized in that: The expansion sleeve (2) has a return spring (4) at the end away from the bolt insertion end, and the return spring (4) causes the expansion sleeve (2) to tend to move closer to the annular inclined surface (3).

6. The quick-install bracket anchor bolt according to claim 5, characterized in that: The return spring (4) has a support ring (5) at one end away from the expansion sleeve (2), and the support ring (5) is mounted on the anchor body (1).

7. A quick-install bracket anchor bolt according to claim 6, characterized in that: The anchor body (1) is provided with a limiting groove (11) to accommodate the support ring (5), and the limiting groove (11) restricts the displacement path of the support ring (5) along its axial direction.

8. A quick-install bracket anchor bolt according to claim 1, characterized in that: The anchor body (1) has an installation part (12) formed along the direction of the bolt insertion end. The installation part (12) has a groove (121) and an installation fitting (6) is engaged in the groove (121).

9. A quick-install bracket anchor bolt according to claim 1, characterized in that: An anti-rotation block (13) is fixedly installed on the inner wall of the anchor body (1). In the first working state, the anti-rotation block (13) is engaged with the arc-shaped petal (21).

10. A quick-install bracket anchor bolt according to claim 9, characterized in that: The arc-shaped petal (21) has a circumferential groove (212) near one end of the anti-rotation block (13), and the anti-rotation block (13) is engaged between the groove (212) or the arc-shaped petal (21).

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