Novel expansion screw

Abstract

The utility model belongs to the technical field of expansion screws, and provides a novel expansion screw which comprises a main body mechanism, a working mandrel and two expansion assemblies, a plurality of mandrel eccentric wheels are fixedly mounted on the outer surface of the working mandrel, and the two expansion assemblies are oppositely mounted on the two sides of the mandrel eccentric wheels respectively. The expansion assembly comprises two working pieces arranged on the two sides of the core shaft eccentric wheel. According to the expansion screw with the design of the structure, firstly, the expansion screw is used and disassembled on the basis of not damaging the structure of the expansion screw, installation and disassembly are simple and convenient, secondly, due to the fact that the integrity of the expansion screw is guaranteed during installation and disassembly, repeated use of the expansion screw can be achieved, and the cost is reduced. And finally, due to the fact that a plurality of anchor hooks are fixedly installed on the transverse sides of the two working pieces, the contact degree of the expansion screw and the wall is increased, and therefore the bearing capacity, durability and safety of the expansion screw are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion screws, in particular to a novel expansion screw. Background Art

[0002] Expansion screws are a special threaded connector used to fix pipe supports / hangers / brackets or equipment on walls, floors or columns. Expansion screws use the shear slope to promote expansion to produce friction and grip force to achieve a fixing effect. Currently on the market, the screws have a thread on one end and a taper on the other end. They are wrapped with a steel sheet. There are several cuts on the half of the iron sheet cylinder. They are stuffed into the holes made in the wall together, and then the nut is locked. The nut pulls the screw outwards and pulls the taper into the steel sheet cylinder. The steel sheet cylinder is expanded and then tightly fixed to the wall.

[0003] In a Chinese patent with publication number CN202991757, an expansion head fastening screw is mentioned. The utility model fills the expansion head fastening screw into a specified position, and then hammers in a core nail, so that the expansion head of the expansion screw cracks, increases the outer area, and fixes the expansion screw.

[0004] However, the utility model directly uses a core nail to split the expansion head, or the common method on the market to expand the steel cylinder, both of which have the problem that the expansion head cannot return to its original state after being expanded, resulting in permanent deformation, making it difficult to reuse the expansion screws, resulting in a waste of manufacturing costs. At the same time, the expansion head is generally expanded and contacts the wall, which makes the contact area between the expansion screw and the wall small, resulting in weak bearing capacity of the expansion screw. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a novel expansion screw to solve the above problems.

[0006] A new expansion screw, comprising

[0007] The main body mechanism includes a working mandrel, and a plurality of mandrel eccentric wheels are fixedly mounted on the outer surface of the working mandrel. The main body mechanism also includes an expansion assembly, and the expansion assembly has two parts, which are respectively mounted on both sides of the mandrel eccentric wheel relative to each other, and the expansion assembly includes two working pieces arranged on both sides of the mandrel eccentric wheel;

[0008] The limiting mechanism comprises a working positioning pin which is penetrated inside the working core shaft.

[0009] Preferably, the expansion assembly further comprises a baffle, and the front ends of the two working pieces are fixedly mounted with a baffle, and the front end of the working mandrel passes through the two baffles.

[0010] Preferably, a plurality of anchor hooks are fixedly mounted on the outer surfaces of the two working sheets.

[0011] Preferably, the limiting mechanism also includes a working base arranged at the front end of the two baffles, the working core shaft passes through the working base, the working base is provided with a plurality of working positioning grooves, the working positioning pin passes through the working core shaft and engages with the working positioning grooves, a spring is fixedly installed outside the working positioning pin to avoid being fixed, and the spring is fixedly connected to the working base.

[0012] Preferably, the working base has two working positioning tails relatively fixedly mounted thereon.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model, by designing the expansion screw of this structure, firstly realizes the use and disassembly of the expansion screw without destroying the structure of the expansion screw, and the installation and disassembly are simple and convenient. Secondly, since the integrity of the expansion screw is guaranteed during installation and disassembly, the expansion screw can be reused to avoid wasting resources. Finally, since many anchor hooks are fixedly installed on one lateral side of the two working pieces, the contact degree between the expansion screw and the wall is increased, thereby improving the bearing capacity, durability and safety of the expansion screw.

[0015] 2. The utility model can position the expansion screw by means of a working positioning tail relatively fixedly installed on the working base, thereby maintaining the relative position of the expansion screw and the wall when being tensioned. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model from a first viewing angle before use;

[0017] Figure 2 This is a schematic diagram of the structure of the utility model from a second viewing angle before use;

[0018] Figure 3 It is a schematic diagram of the structure of the main mechanism of the utility model;

[0019] Figure 4 It is a schematic diagram of the structure after use of the utility model.

[0020] In the figure:

[0021] 100, main body mechanism; 101, working mandrel; 102, mandrel eccentric wheel; 103, baffle; 104, working piece; 105, anchor hook; 200, limiting mechanism; 201, working base; 202, working positioning groove; 203, working positioning pin; 204, spring; 205, working positioning tail. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0023] As attached Figure 1 To Attachment Figure 4 As shown:

[0024] Embodiment 1: The utility model provides a new type of expansion screw, including a main body mechanism 100 and a limiting mechanism 200, the main body mechanism 100 includes a working core shaft 101, and a plurality of core shaft eccentric wheels 102 are fixedly installed on the outer surface of the working core shaft 101. The main body mechanism 100 also includes an expansion component, and the expansion component has two, which are respectively relatively installed on both sides of the core shaft eccentric wheel 102. The expansion component includes two working pieces 104 arranged on both sides of the core shaft eccentric wheel 102. The expansion component also includes a baffle 103, and the front ends of the two working pieces 104 are fixedly installed with the baffle 103. The front end of the working core shaft 101 passes through the two baffles 103, and the outer surfaces of the two working pieces 104 are fixedly installed with a plurality of anchor hooks 105.

[0025] The limiting mechanism 200 includes a working positioning pin 203 penetrating the inside of the working spindle 101 .

[0026] The limiting mechanism 200 also includes a working base 201 arranged at the front end of the two baffles 103, the working core shaft 101 passes through the working base 201, the working base 201 is provided with a plurality of working positioning grooves 202, the working positioning pin 203 passes through the working core shaft 101 and engages with the working positioning groove 202, a spring 204 is fixedly installed on the outer surface of the working positioning pin 203, and the spring 204 is fixedly connected to the working base 201.

[0027] As can be seen from the above, when using the present expansion screw, a hole is drilled on the wall using a drilling machine, and the working mandrel 101 is rotated to make the mandrel eccentric wheel 102 in a state of minimum radius. Then, the mandrel eccentric wheel 102 squeezes the working piece 104 outward. At this time, the present expansion screw is in a relaxed state. The expansion screw is placed inside the wall, and a screw or nut is sleeved on the outer surface of the working mandrel 101 passing through the working base 201. The nut is tightened to drive the working mandrel 101 to rotate 90° clockwise. When the mandrel eccentric wheel 102 on the outer surface of the working mandrel 101 rotates to the maximum radius, the working pieces 104 on both sides are pushed to expand outward. The anchor hooks 105 on the expanded working pieces 104 hook the wall. At this time, the working positioning pin 203 is inserted into the working mandrel 101 and engaged with the working positioning groove 202, so that the working mandrel 101 is positioned and fixed to avoid autonomous rotation, thereby completing the installation and fixation of the present collision screw.

[0028] When the expansion screw needs to be disassembled, the nut is loosened to drive the working mandrel 101 to rotate, so that the mandrel eccentric wheel 102 rotates to the minimum radius, and no longer squeezes the working piece 104, so that the working piece 104 no longer expands, and the expansion screw returns to a relaxed state, and the expansion screw is taken out from the inside of the wall.

[0029] After the working core shaft 101 rotates, the working positioning pin 203 maintains the relative position of the working core shaft 101 and the working piece 104, and the working positioning pin 203 is stuck in the working positioning groove 202 of the working base 201. The spring 204 is tensioned to prevent the working positioning pin 203 from moving, thereby maintaining the working state of the expansion screw. When the working core shaft 101 rotates next time, the working positioning pin 203 rotates up 90° along the slope of the working positioning groove 202 and then enters the next working positioning groove 202, completing a change in the working state of the expansion screw.

[0030] By designing the expansion screw of this structure, firstly, the expansion screw can be used and disassembled without destroying the structure of the expansion screw, and the installation and disassembly are simple and convenient. Secondly, since the integrity of the expansion screw is guaranteed during installation and disassembly, the expansion screw can be reused to avoid wasting resources. Finally, since many anchor hooks 105 are fixedly installed on one lateral side of the two working pieces 104, the contact degree between the expansion screw and the wall is increased, thereby improving the bearing capacity, durability and safety of the expansion screw.

[0031] Embodiment 2: This is the second embodiment of the utility model, including a limiting mechanism 200 , and a working base 201 having two working positioning tails 205 relatively fixedly installed.

[0032] As can be seen from the above, the expansion screw can be positioned by the working positioning tail 205 relatively fixedly installed on the working base 201, thereby maintaining the relative position of the expansion screw and the wall when being tensioned.

[0033] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. Therefore, all such modifications are intended to be included within the scope of the present invention, and the order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. It is understood that the above embodiments are exemplary and cannot be construed as limitations on the present invention. Those of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A new type of expansion screw, characterized by: include The main body mechanism (100) comprises a working mandrel (101), wherein a plurality of mandrel eccentric wheels (102) are fixedly mounted on the outer surface of the working mandrel (101), and the main body mechanism (100) further comprises an expansion assembly, wherein the expansion assembly comprises two pieces, which are respectively mounted on two sides of the mandrel eccentric wheel (102) in a relative manner, and the expansion assembly comprises two working pieces (104) arranged on two sides of the mandrel eccentric wheel (102); The limiting mechanism (200) comprises a working positioning pin (203) which is inserted into the working core shaft (101).

2. A novel expansion screw as claimed in claim 1, characterized in that: The expansion assembly further comprises a baffle (103), the front ends of the two working pieces (104) are both fixedly mounted with a baffle (103), and the front end of the working mandrel (101) passes through the two baffles (103).

3. A novel expansion screw as claimed in claim 1, characterized in that: A plurality of anchor hooks (105) are fixedly mounted on the outer surfaces of the two working sheets (104).

4. A novel expansion screw as claimed in claim 2, characterized in that: The limiting mechanism (200) further comprises a working base (201) arranged at the front ends of the two blocking pieces (103); the working spindle (101) passes through the working base (201); the working base (201) is provided with a plurality of working positioning grooves (202); the working positioning pin (203) passes through the working spindle (101) and engages with the working positioning grooves (202); a spring (204) is fixedly mounted on the outer surface of the working positioning pin (203); and the spring (204) is fixedly connected to the working base (201).

5. A novel expansion screw as claimed in claim 4, characterized in that: The working base (201) has two working positioning tails (205) relatively fixedly mounted thereon.

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