Expansion screw suitable for wall

Abstract

The invention relates to the technical field of fasteners, in particular to an expansion screw suitable for a wall. The expansion device comprises an expansion control pipe, a screw rod, a nut and expansion barbs, the expansion barbs are placed in expansion clamping holes formed in the expansion control pipe; the screw rod is screwed in the expansion control pipe, and the expansion barbs are outwards extruded and clamped in a wall body through the expansion driving section of the screw rod; and a nut is screwed at the tail part of the screw rod to carry out overall stress on the expansion screw. According to the technical scheme, the problems that in the prior art, a traditional expansion screw is prone to loosening or local damage under the action of vibration, impact and long-term load; the screw, the nut and the expansion pipe are easy to rotate synchronously in the mounting process, so that the construction efficiency is influenced; the conical block is separated from the expansion pipe due to excessive tightening, so that anchoring fails; and the number of the expansion sections is fixed, so that the expansion sections cannot adapt to different matrix conditions and load requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of fasteners, and in particular to an expansion screw suitable for walls. Background Art

[0002] Expansion screws, as a common fastener, are widely used in fields such as construction, decoration, and equipment installation. They are mainly used to provide reliable anchoring force on substrates such as concrete and brick walls. Traditional expansion screws usually consist of a screw, an expansion tube, and a conical pressure block. Their working principle is to move the conical block outward by tightening the nut, forcing the expansion tube to expand radially, thereby generating friction and mechanical engagement with the inner wall of the installation hole. However, existing expansion screws still have many technical defects in actual applications: First, the traditional structure relies only on a single expansion point to provide anchoring force, which leads to stress concentration and is prone to loosening under vibration, impact, or long-term load, and even causes local damage to the substrate; second, the problem of synchronous rotation of the screw, nut, and expansion tube is prone to occur during the installation process, affecting construction efficiency, and over-tightening may cause the conical block to detach from the expansion tube, causing the anchoring to fail; in addition, the number of expansion sections is fixed and cannot adapt to different substrate conditions and load requirements, limiting its scope of application.

[0003] In view of the problems existing in the above-mentioned prior art, it is very necessary to research and design a new expansion screw suitable for walls, so as to overcome the problems existing in the prior art. Summary of the Invention

[0004] According to the above-mentioned prior art, the traditional expansion screws proposed are prone to loosening or partial damage under the action of vibration, impact and long-term load; the screw, nut and expansion tube are prone to synchronous rotation during the installation process, affecting the construction efficiency; over-tightening causes the conical block to detach from the expansion tube, making the anchoring ineffective; and because the number of expansion sections is fixed, it cannot adapt to different substrate conditions and load requirements and other technical problems, and provides a new expansion screw with multiple expansion points, which can be adjusted later and the number of expansion sections is adjustable. The design of the present invention realizes uniform stress distribution and improves pull-out bearing capacity and anti-vibration performance by setting multiple independent expansion sections; at the same time, a structure with adjustable screw-in depth is adopted to support secondary resistance increase after anchoring and enhance long-term stability. The present invention effectively solves the problems of uneven force, easy loosening and insufficient adaptability of traditional expansion screws, and provides a more reliable and flexible fastening solution for the fields of construction and equipment installation.

[0005] The technical means adopted in the present invention are as follows:

[0006] An expansion screw suitable for wall includes: an expansion control tube, a screw rod, a nut and an expansion barb;

[0007] Furthermore, the expansion barb is placed in the expansion clamping hole provided on the expansion control tube;

[0008] Furthermore, the screw is screwed inside the expansion control tube, and the expansion barbs are squeezed outward and stuck in the wall through the expansion drive section of the screw;

[0009] Furthermore, a nut is screwed onto the tail of the screw rod to provide overall force to the expansion screw.

[0010] Furthermore, the expansion control tube is a complete tubular structure;

[0011] Furthermore, the front end of the expansion control tube is a rotation constraint section, and the rotation constraint section is composed of a plurality of spikes evenly distributed on the front end surface of the expansion control tube;

[0012] Furthermore, a plurality of expansion holes for assembling expansion barbs are evenly distributed on the wall of the expansion control tube;

[0013] Furthermore, an internal thread section of the expansion tube for rotating the assembly screw is provided on the inner wall of the expansion control tube.

[0014] Furthermore, the front portion of the screw is processed into an expansion drive section, the middle portion is processed into a smooth transition section, and the rear portion is processed into an anchoring thread section;

[0015] Furthermore, the expansion drive section is processed into a multi-vertebral structure that is connected in sequence and is thin at the front and thick at the back;

[0016] Furthermore, the anchoring thread section is processed with threads for use with a nut.

[0017] Furthermore, the front end of the screw and the rear part of each vertebral body of the expansion drive section are processed with a screw-in threaded section for use in conjunction with the internal threaded section of the expansion tube.

[0018] Furthermore, the length of the internal thread of the internal thread section of the expansion tube must be greater than the length of the screwed-in thread section, and the thread extends inwards, otherwise there will be no thread to be screwed in when the screwing depth is too great.

[0019] Furthermore, a hexagonal nut section is processed at the rear of the anchoring thread section for applying a tightening force to the screw rod.

[0020] Furthermore, the main body of the expansion barb is a barb smooth section placed in the expansion clamp hole, and a barb bite tip at the upper part of the barb smooth section for piercing the wall.

[0021] Furthermore, the size of the smooth section of the barb is adapted to that of the expansion hole, and there is a certain contact force between the two to prevent the expansion barb from automatically falling off.

[0022] The use of the present invention is as follows:

[0023] 1. Install the screw into the expansion control tube by screwing the threaded section into the expansion tube and matching it with the internal threaded section of the expansion tube;

[0024] 2. Install the expansion barb into the expansion card hole, adjust the screw insertion depth, and ensure that the barb bite tip does not protrude from the expansion card hole;

[0025] 3. Use a drill bit to drill a hole in the wall or other structure. The hole size should be the same as the expansion control tube.

[0026] 4. Insert the expansion screw into the wall hole as a whole, so that the rotation constraint section contacts the bottom of the hole and bears the force, so that the expansion control tube cannot rotate. Then screw the screw further in. At this time, the expansion drive section will drive the expansion barb to move outward, and the barb bite tip will bite into the wall. The bite force increases with the increase of screwing depth.

[0027] 5. Put the nut on the hexagonal nut section and tighten it to complete the overall force.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] 1. The expansion screws provided by the present invention are suitable for walls and have multiple expansion points, which can evenly bear force and avoid stress concentration, thus improving pull-out bearing capacity and vibration resistance.

[0030] 2. The expansion screws provided by the present invention are suitable for walls. By adjusting the screwing depth, secondary tightening or resistance increase adjustment can be performed according to actual needs after initial installation.

[0031] 3. The expansion screws for walls provided by the present invention can realize flexible adjustment of the number and size of multiple expansion sections through modular design, meeting the needs of various projects from general decoration to heavy equipment installation;

[0032] 4. The expansion screws provided by the present invention are suitable for walls and can be reused after being removed without being damaged, thereby improving waste utilization and being environmentally friendly.

[0033] In summary, the technical solution of the present invention solves the problems in the prior art that traditional expansion screws are prone to loosening or local damage under vibration, impact and long-term load; the screw, nut and expansion tube are prone to synchronous rotation during installation, affecting construction efficiency; excessive tightening causes the conical block to detach from the expansion tube, making the anchoring ineffective; and because the number of expansion sections is fixed, it cannot adapt to different base conditions and load requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0035] Figure 1 For the present invention, a state diagram is used;

[0036] Figure 2 It is a schematic diagram of the structure of the present invention;

[0037] Figure 3 This is a schematic diagram of the structure of the expansion control tube of the present invention;

[0038] Figure 4 This is a schematic diagram of the internal structure of the expansion control tube of the present invention;

[0039] Figure 5 Schematic diagram of the screw structure of the present invention;

[0040] Figure 6 This is a schematic diagram of the expansion barb structure of the present invention;

[0041] Figure 7 It is a schematic diagram of the nut structure of the present invention.

[0042] In the figure: 1, expansion control tube 101, rotation constraint section 102, expansion card hole 103, expansion tube internal thread section 2, screw 201, screw-in thread section 202, expansion drive section 203, anchoring thread section 204, hexagonal nut section 205, smooth transition section 3, nut 4, expansion barb 401, barb smooth section 402, barb bite tip. DETAILED DESCRIPTION

[0043] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0047] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0048] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0049] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0050] like Figure 1-2 As shown, the present invention provides an expansion screw suitable for walls, comprising: an expansion control tube 1, a screw rod 2, a nut 3 and an expansion barb 4; the expansion barb 4 is placed in an expansion clamping hole 102 opened on the expansion control tube 1; the screw rod 2 is screwed into the interior of the expansion control tube 1, and the expansion barb 4 is squeezed outward and clamped in the wall through the expansion drive section 202 of the screw rod 2; a nut 3 is screwed onto the tail of the screw rod 2 to carry out the overall force of the expansion screw.

[0051] like Figure 3-4 As shown, the expansion control tube 1 is a complete tubular structure; the front end of the expansion control tube 1 is a rotation constraint section 101, which consists of multiple spikes evenly distributed on the front end face of the expansion control tube 1; the tube wall of the expansion control tube 1 is evenly distributed with multiple expansion card holes 102 for assembling expansion barbs 4; the inner wall of the expansion control tube 1 is provided with an expansion tube internal thread section 103 for rotating the assembly screw 2.

[0052] like Figure 5 As shown, the front part of the screw 2 is processed into the expansion drive section 202, the middle part is processed into the smooth transition section 205, and the rear part is processed into the anchoring thread section 203; the expansion drive section 202 is processed into a multi-vertebral structure that is thin in front and thick in the back and connected in sequence; the anchoring thread section 203 is processed with threads for use with the nut 3.

[0053] like Figure 5As shown, the front end of the screw rod 2 and the rear part of each vertebral body of the expansion drive section 202 are processed with a screw-in threaded section 201 for use with the internal threaded section 103 of the expansion tube.

[0054] like Figure 4 、 5 The length of the internal thread of the expansion tube internal thread section 103 must be greater than the length of the screwed-in thread section 201 , and the thread must extend inwards. Otherwise, if the screwing depth is too great, no thread will be left to screw.

[0055] like Figure 2 、 5 As shown, a hexagonal nut segment 204 is processed at the rear of the anchoring thread segment 203 for applying a tightening force to the screw rod 2 .

[0056] like Figure 6 As shown, the main body of the expansion barb 4 is a barb smooth section 401 placed in the expansion card hole 102, and a barb bite tip 402 on the upper part of the barb smooth section 401 for piercing the wall.

[0057] like Figure 1 As shown, the barb smooth section 401 is adapted to the size of the expansion clamping hole 102, and there is a certain contact force between the two to prevent the expansion barb 4 from falling off automatically.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An expansion screw suitable for a wall, characterized by: The expansion screw suitable for wall comprises: an expansion control tube (1), a screw rod (2), a nut (3) and an expansion barb (4); The expansion barb (4) is placed in the expansion clamping hole (102) provided on the expansion control tube (1); The screw (2) is screwed into the interior of the expansion control tube (1), and the expansion barb (4) is squeezed outward and stuck in the wall through the expansion drive section (202) of the screw (2); The tail of the screw rod (2) is screwed with a nut (3) to support the overall force of the expansion screw.

2. The expansion screw suitable for wall according to claim 1, characterized in that: The expansion control tube (1) is a complete tubular structure; The front end of the expansion control tube (1) is a rotation constraint section (101), and the rotation constraint section (101) is composed of a plurality of spikes evenly distributed on the front end surface of the expansion control tube (1); The wall of the expansion control tube (1) is evenly distributed with a plurality of expansion clamping holes (102) for assembling expansion barbs (4); An expansion tube internal thread section (103) for rotating the assembly screw rod (2) is provided on the inner wall of the expansion control tube (1).

3. The expansion screw suitable for wall according to claim 1, characterized in that: The front portion of the screw (2) is processed into an expansion drive section (202), the middle portion is processed into a smooth transition section (205), and the rear portion is processed into an anchoring thread section (203); The expansion drive section (202) is processed into a multi-vertebral structure that is connected in sequence and is thin at the front and thick at the back; The anchoring thread section (203) is processed with threads for use with the nut (3).

4. The expansion screw suitable for wall according to claim 3, characterized in that: The front end of the screw rod (2) and the rear part of each vertebral body of the expansion drive section (202) are processed with a screw-in thread section (201) for use in conjunction with the internal thread section (103) of the expansion tube.

5. The expansion screw suitable for wall according to claim 4, characterized in that: The length of the internal thread of the expansion tube internal thread section (103) must be greater than the length of the screwed-in thread section (201), and the thread extends inwards, otherwise there will be no thread to screw in when the screwing depth is too great.

6. The expansion screw suitable for wall according to claim 3, characterized in that: The rear portion of the anchoring threaded section (203) is processed with a hexagonal nut section (204) for applying a tightening force to the screw rod (2).

7. The expansion screw suitable for wall according to claim 1, characterized in that: The main body of the expansion barb (4) is a barb smooth section (401) placed in the expansion clamping hole (102), and a barb bite tip (402) on the upper part of the barb smooth section (401) for piercing the wall.

8. The expansion screw suitable for wall according to claim 7, characterized in that: The barb smooth section (401) is adapted to the size of the expansion clamping hole (102), and there is a certain contact force between the two to prevent the expansion barb (4) from falling off automatically.

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