Anti-seismic and anti-loosening expansion screw for building

Abstract

The utility model relates to the technical field of expansion screws, one embodiment of the utility model provides an anti-seismic and anti-loosening building expansion screw which comprises an expansion pipe and a screw rod, the bottom end of the screw rod is fixedly connected with a conical block, the anti-seismic and anti-loosening building expansion screw further comprises a plurality of barbs, a gasket, a sleeve and an elastic abutting piece, the barbs are arranged on the outer side wall of the bottom of the expansion pipe, and the gasket is arranged on the outer side wall of the bottom of the expansion pipe. A gasket is arranged at the bottom end of the inner side wall of the expansion pipe, the outer side wall of the sleeve is fixedly connected with the inner side wall of the gasket, and the elastic abutting piece is arranged on the sleeve and the screw and used for transversely and elastically abutting against and supporting the expansion pipe. According to the technical scheme, the technical problem that in the prior art, an expansion screw is loosened due to vibration, a gap is generated between an expansion pipe and a hole wall, and therefore the stability of a connecting structure is seriously affected is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of expansion screw technology, and more specifically, to a shock-resistant and anti-loosening expansion screw for building applications. Background Technology

[0002] An expansion screw consists of a screw and an expansion tube. The tail of the screw is conical, and the inner diameter of the cone is larger than the inner diameter of the expansion tube. When the nut is tightened, the screw moves outward, and the axial movement of the thread causes the conical part to move, thereby creating a large positive pressure on the outer circumference of the expansion tube. In addition, the angle of the cone is very small, which causes the expansion tube to expand, thus fixing the expansion screw to the wall.

[0003] Among the widely used expansion screws, metal expansion screws are typically used in the construction industry because of their strong load-bearing capacity. They are suitable for hard substrates such as concrete and brick walls and can fix heavy-duty components. However, during long-term use, the outer surface of the expansion tube is relatively smooth, resulting in less friction with the hole wall. This can cause the screw to loosen due to the shaking of the component, creating a gap between the expansion tube and the hole wall. This can seriously affect the stability of the connection structure and, in severe cases, lead to safety accidents. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a shock-resistant and anti-loosening building expansion bolt, which solves the technical problem in the prior art where the expansion bolt loosens due to vibration, resulting in a gap between the expansion tube and the hole wall, thereby seriously affecting the stability of the connection structure.

[0005] According to one aspect, at least one embodiment of this disclosure provides a seismic-resistant and anti-loosening building expansion bolt, including an expansion tube and a screw rod. A tapered block is fixedly connected to the bottom end of the screw rod. The bolt rod also includes a plurality of barbs, a washer, a sleeve, and an elastic clamping member. The plurality of barbs are disposed on the outer side wall of the bottom of the expansion tube. The washer is disposed at the bottom end of the inner side wall of the expansion tube. The outer side wall of the sleeve is fixedly connected to the inner side wall of the washer. The elastic clamping member is disposed on the sleeve and the screw rod for laterally elastically clamping and supporting the expansion tube.

[0006] Preferably, to increase the supporting force on the inner wall of the expansion tube, the elastic clamping member includes two sets of clamping plates, a compression spring, a connecting plate, a compression head, and a compression member. The two sets of clamping plates are symmetrically arranged inside the expansion tube. One end of each clamping plate is fixedly connected to the inner wall of the expansion tube. Each set of clamping plates includes multiple clamping plates. One end of each compression spring is fixedly connected to the other end of each clamping plate. One end of each connecting plate is fixedly connected to the other end of each compression spring. The connecting plate penetrates the inner wall of the sleeve and is slidably connected to the sleeve. One end of each compression head is fixedly connected to the other end of each connecting plate. The compression member is disposed on the sleeve and is used to compress and push the compression head to move horizontally.

[0007] Furthermore, in order to apply extrusion force to the extrusion head and make it move laterally, the extrusion component includes a moving plate, an extrusion seat, and a limiting member. The moving plate is sleeved on the screw and is coaxially threaded to the screw. One end of the extrusion seat is fixedly connected to the bottom end of the moving plate. The extrusion seat is threaded to the screw and slides against the inner wall of the sleeve. The limiting member is provided on the extrusion seat and the sleeve to restrict the horizontal rotation of the extrusion seat.

[0008] Furthermore, to prevent the extrusion seat from rotating continuously under the drive of the screw, the extrusion seat can be raised longitudinally. The limiting member includes two limiting plates and a limiting groove. The two limiting plates are symmetrically arranged on the outer side wall of the extrusion seat and fixedly connected to the extrusion seat. The sleeve is provided with a limiting groove that cooperates with the limiting plate. The limiting plate slides in cooperation with the inner wall of the limiting groove.

[0009] As a further aspect of this application, in order to expand the bottom of the expansion tube and insert it into the hole to maintain the stability of the expansion tube, the bottom of the expansion tube is provided with multiple slots, the barbs and the expansion tube are inclined at an angle, and one end of the barbs is pointed and tilted upwards.

[0010] As a further aspect of this application, in order to compress the extrusion head and move it horizontally away from the axis of the sleeve during the longitudinal ascent of the extrusion head, one end of the moving plate is arc-shaped and cooperates with the extrusion head.

[0011] Based on the aforementioned solution, in order to support the horizontal movement of the connecting plate and the extrusion head, the connecting plate is cylindrical, and the radius of the connecting plate is the same as the radius of the extrusion head.

[0012] Furthermore, in order to enable the extrusion seat to sequentially press and press the multiple extrusion heads together, each set of pressing plates is longitudinally distributed, and the distance between the two extrusion heads that are furthest apart is less than the height of the extrusion seat.

[0013] The beneficial effects of the embodiments disclosed herein are as follows:

[0014] 1. In this disclosure, by setting multiple barbs, when the screw drives the conical block to move, the conical block squeezes the bottom of the expansion tube and causes the bottom wall of the expansion tube to "open up". At the same time, multiple barbs are inserted into the hole wall, increasing the friction between the expansion tube and the hole wall and preventing the expansion tube from loosening due to vibration.

[0015] 2. In this disclosure, through the cooperation of washers and elastic clamping parts, turning the nut drives the screw to drive the moving plate and the pressing seat to rise. The pressing seat, through the cooperation of the limiting plate and the limiting groove, causes the moving plate and the pressing seat to rise. During the movement, one end of the moving plate presses the pressing head and causes the pressing head to move away from the axis of the sleeve in the horizontal direction. The pressing head presses the pressing spring, and the pressing spring contracts and pushes the clamping plate, so that the clamping plate presses against the inner wall of the expansion tube. The pressing seat presses multiple pressing heads in sequence, thereby increasing the clamping area of ​​the expansion tube and enhancing the support effect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure in one embodiment of the present disclosure;

[0018] Figure 2 For one embodiment of this disclosure Figure 1 Enlarged view of the local structure at point A;

[0019] Figure 3 This is a partial structural cross-sectional view of the whole in one embodiment of this disclosure;

[0020] Figure 4 For one embodiment of this disclosure Figure 3 A partial structural cross-sectional view at point B in the middle;

[0021] Figure 5 This is a partial cross-sectional view of the structure of the extrusion seat in one embodiment of the present disclosure after multiple extrusion heads are pressed together;

[0022] Figure 6 This is a partial structural cross-sectional view of the sleeve, extruder, and limiting member in one embodiment of the present disclosure.

[0023] In the diagram: 1. Expansion tube; 2. Screw; 3. Conical block; 4. Barb; 5. Washer; 6. Sleeve; 7. Clamping plate; 8. Compression spring; 9. Connecting plate; 10. Compression head; 11. Moving plate; 12. Compression seat; 13. Limiting plate; 14. Limiting groove; 15. Slot; 16. Nut; 17. Washer. Detailed Implementation

[0024] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0025] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0026] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0027] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this disclosure.

[0029] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] like Figures 1-6 The diagram illustrates an anti-seismic and anti-loosening expansion bolt for construction, according to an embodiment of this disclosure. It includes an expansion tube 1 and a screw 2. The expansion tube 1 is a metal expansion tube. A conical block 3 is fixedly connected to the bottom end of the screw 2. The cross-sectional area of ​​one end of the conical block 3 is smaller than that of the expansion tube 1, while the cross-sectional area of ​​the other end is larger than that of the expansion tube 1. The bolt also includes multiple barbs 4, washers 5, sleeves 6, and elastic clamping elements. The multiple barbs 4 are disposed on the outer side wall of the bottom of the expansion tube 1 to allow the bottom of the expansion tube 1 to expand and penetrate into the hole, maintaining the expansion. To ensure the stability of tube 1, multiple slots 15 are provided at the bottom of expansion tube 1. The barbs 4 and expansion tube 1 are inclined at an angle. One end of the barbs 4 is pointed and tilted upward. A washer 5 is provided at the bottom of the inner wall of expansion tube 1. The outer wall of sleeve 6 is fixedly connected to the inner wall of washer 5. Washer 5 and sleeve 6 can absorb the lateral force from expansion tube 1, support the bottom of expansion tube 1, and avoid excessive gap between the outer wall of expansion tube 1 and the hole wall. An elastic clamping element is provided on sleeve 6 and screw 2 for lateral elastic clamping and support of expansion tube 1.

[0031] like Figure 3 and Figure 4 As shown, in order to increase the support force on the inner wall of the expansion tube 1, the elastic clamping component includes two sets of clamping plates 7, compression springs 8, connecting plates 9, extrusion heads 10, and extrusion components. The two sets of clamping plates 7 are symmetrically arranged inside the expansion tube 1. One end of the clamping plate 7 is fixedly connected to the inner wall of the expansion tube 1. Each set of clamping plates 7 includes multiple clamping plates 7. One end of the compression spring 8 is fixedly connected to the other end of the clamping plate 7. One end of the connecting plate 9 is fixedly connected to the other end of the compression spring 8. The connecting plate 9 penetrates the inner wall of the sleeve 6 and is slidably connected to the sleeve 6. One end of the extrusion head 10 is fixedly connected to the other end of the connecting plate 9. In order to support the horizontal movement of the connecting plate 9 and the extrusion head 10, the connecting plate 9 is cylindrical. The radius of the connecting plate 9 is the same as the radius of the extrusion head 10. The extrusion component is arranged on the sleeve 6 and is used to extrude and push the extrusion head 10 to move horizontally.

[0032] like Figure 5As shown, in order to apply extrusion force to the extrusion head 10 and make it move laterally, the extrusion component includes a moving plate 11, an extrusion seat 12, and a limiting member. The moving plate 11 is sleeved on the screw 2 and is coaxially threaded to the screw 2. In order to extrude the extrusion head 10 and make it move horizontally away from the axis of the sleeve 6 during the longitudinal upward movement of the extrusion head 10, one end of the moving plate 11 is arc-shaped and cooperates with the extrusion head 10. One end of the extrusion seat 12 is fixedly connected to the bottom end of the moving plate 11. The extrusion seat 12 is threaded to the screw 2 and slides against the inner wall of the sleeve 6. In order for the extrusion seat 12 to extrude and press the multiple extrusion heads 10 in sequence, each The clamping plates 7 are longitudinally distributed. The distance between the two extrusion heads 10 that are furthest apart is less than the height of the extrusion seat 12. Tightening the nut 16 drives the screw 2 to rise. The screw 2 drives the moving plate 11 and the extrusion seat 12 to rise. During the movement, one end of the moving plate 11 squeezes the extrusion head 10 and causes the extrusion head 10 to move away from the axis of the sleeve 6 in the horizontal direction. The extrusion head 10 squeezes the compression spring 8. The compression spring 8 contracts and pushes the clamping plate 7, so that the clamping plate 7 presses against the inner wall of the expansion tube 1. The extrusion seat 12 sequentially squeezes and limits the extrusion heads 10. The limiting member is set on the extrusion seat 12 and the sleeve 6 to limit the horizontal rotation of the extrusion seat 12.

[0033] like Figure 6 As shown, to prevent the extrusion seat 12 from rotating continuously under the drive of the screw 2, the extrusion seat 12 can be raised longitudinally. The limiting component includes two limiting plates 13 and a limiting groove 14. The two limiting plates 13 are symmetrically arranged on the outer side wall of the extrusion seat 12 and fixedly connected to the extrusion seat 12. The sleeve 6 is provided with a limiting groove 14 that cooperates with the limiting plates 13. When the screw 2 is inserted into the expansion tube 1, the limiting plates 13 need to correspond with the limiting groove 14. When the conical block 3 is attached to the bottom end of the expansion tube 1, the top end of the limiting plate 13 is just inserted into the limiting groove 14. The limiting plate 13 and the inner wall of the limiting groove 14 slide together. Through the cooperation of the limiting plates 13 and the limiting groove 14, the extrusion seat 12 causes the moving plate 11 and the extrusion seat 12 to rise longitudinally under the drive of the screw 2, and the rising speed is greater than the speed of the conical block 3.

[0034] Working principle: When using this anti-seismic and anti-loosening building expansion bolt, it is necessary to use relevant tools to drill holes in the corresponding wall. The hole diameter should be slightly larger than the bolt diameter. After drilling, insert the expansion bolt vertically into the hole, ensuring that the other end of the conical block 3 is as close as possible to the inner bottom wall of the hole, and one end of the washer 17 is in contact with the wall. Then, keep the washer stable and tighten the nut 16. The rotation of the nut 16 causes the screw 2 to move upward. The screw 2 causes the conical block 3 to rise vertically while rotating, causing the bottom of the expansion tube 1 to "open up" and causing multiple barbs 4 to embed into the hole wall. The friction between the expansion tube 1 and the hole wall is increased, and the screw 2 simultaneously drives the moving plate 11 and the extrusion seat 12 to rise. The extrusion seat 12, through the cooperation of the limiting plate 13 and the limiting groove 14, causes the moving plate 11 and the extrusion seat 12 to rise. During the movement, one end of the moving plate 11 extrudes the extrusion head 10 and causes the extrusion head 10 to move away from the axis of the sleeve 6 in the horizontal direction. The extrusion head 10 extrudes the extrusion spring 8. The extrusion spring 8 contracts and pushes the pressing plate 7, so that the pressing plate 7 presses against the inner wall of the expansion tube 1. The extrusion seat 12 extrudes multiple extrusion heads 10 in sequence, thereby increasing the pressing area of ​​the expansion tube 1 and enhancing the support effect.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications or substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A seismic-resistant and anti-loosening expansion bolt for construction, comprising an expansion tube (1) and a screw (2), wherein a conical block (3) is fixedly connected to the bottom end of the screw (2), characterized in that, Also includes: Multiple barbs (4) are provided on the outer side wall of the bottom of the expansion tube (1); Washer (5), the bottom end of the inner wall of the expansion tube (1) is provided with the washer (5). Sleeve (6), the outer side wall of the sleeve (6) is fixedly connected to the inner side wall of the washer (5); An elastic clamping member is provided on the sleeve (6) and the screw (2) for laterally elastically clamping and supporting the expansion tube (1).

2. The anti-shock and anti-loose building expansion screw according to claim 1, wherein, The elastic clamping element includes: Two sets of abutting plates (7) are symmetrically arranged inside the expansion tube (1). One end of the abutting plate (7) is fixedly connected to the inner side wall of the expansion tube (1). Each set of abutting plates (7) includes multiple abutting plates (7). A compression spring (8), one end of which is fixedly connected to the other end of the abutment plate (7); A connecting plate (9) is fixedly connected at one end to the other end of the compression spring (8). The connecting plate (9) passes through the inner wall of the sleeve (6) and is slidably connected to the sleeve (6). An extrusion head (10) is fixedly connected at one end to the other end of the connecting plate (9); An extruder is disposed on the sleeve (6) for extruding and pushing the extrusion head (10) to move horizontally.

3. The anti-shock and anti-loose building expansion screw according to claim 2, characterized in that, The extrusion component includes: A movable plate (11) is sleeved on the screw (2) and coaxially threaded to the screw (2); The extrusion seat (12) is fixedly connected at one end to the bottom end of the moving plate (11), the extrusion seat (12) is threadedly connected to the screw (2), and the extrusion seat (12) is slidably engaged with the inner wall of the sleeve (6). A limiting member is provided on the extrusion seat (12) and the sleeve (6) to limit the horizontal rotation of the extrusion seat (12).

4. The anti-shock and anti-loose building expansion screw according to claim 3, characterized in that, The limiting component includes: Two limiting plates (13) are symmetrically arranged on the outer side wall of the extrusion seat (12) and fixedly connected to the extrusion seat (12); The sleeve (6) is provided with a limiting groove (14) that cooperates with the limiting plate (13). The limiting plate (13) slides with the inner wall of the limiting groove (14).

5. The anti-shock and anti-loose building expansion screw according to claim 1, wherein, The bottom of the expansion tube (1) is provided with multiple slots (15), the barb (4) and the expansion tube (1) are inclined at an angle, and one end of the barb (4) is pointed and tilted upward.

6. The anti-shock and anti-loose building expansion screw according to claim 3, wherein, One end of the movable plate (11) is arc-shaped and cooperates with the extrusion head (10).

7. The anti-shock and anti-loose building expansion screw according to claim 2, wherein, The connecting plate (9) is cylindrical, and the radius of the connecting plate (9) is the same as the radius of the extrusion head (10).

8. The anti-shock and anti-loose building expansion screw according to claim 3, wherein, Each set of clamping plates (7) is longitudinally distributed, and the distance between the two farthest extrusion heads (10) is less than the height of the extrusion seat (12).

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