Embedded nut capable of being repeatedly disassembled on metal sheet, pipe fitting and curved surface and method

Abstract

The invention relates to an embedded nut capable of being repeatedly disassembled on a metal sheet, a pipe fitting and a curved surface and a method, the embedded nut can penetrate through a notch formed in a base material to enter the base material or enter the back face of the base material, the embedded nut comprises a nut body, the upper side and the lower side of the nut body are each provided with a wing plate protruding in the radial direction, and the wing plates are connected with the nut body. The thickness of the wing plate is smaller than that of the nut body, so that at least one end face of the nut body forms a positioning step axially protruding out of the wing plate, and the local contour line of the nut body is meshed with the local contour line of the notch so that the embedded nut can be clamped on the notch after rotating by a certain angle. The embedded nut can be repeatedly mounted and dismounted without damaging the base material, and is very convenient.

Description

Technical Field

[0001] The invention relates to an embedded nut which can be repeatedly disassembled on a metal sheet, a pipe fitting and a curved surface and a method thereof. Background Art

[0002] Embedded nuts are represented by internal and external thread nuts commonly used in wood and hot melt nuts used in plastic products. The base material is required to have a certain thickness so that when the screw is fixed, the nut implanted in the base material has enough reverse torque to prevent loosening. For metal (steel, aluminum, copper, etc.) plates, in addition to tapping on thicker plates to act as nuts, or welding a nut, thin plates generally rely on press rivet nuts or pull rivet nuts to pre-implant nuts. The press riveting method is only suitable for plates, not pipes, and both sides of the plate must withstand the pressure of the machine. It cannot work under vertical or single-sided suspended conditions; the pull riveting method will leave a certain thickness of nut head outside the base material, affecting the use.

[0003] Limited by the working method of implanting nuts, whether it is a press riveting or a pull riveting nut, it cannot be implanted on a curved surface, including a common round tube or spherical surface. Nuts can only be implanted on flat plates or square tubes. And the implanted nuts are permanent and can only be removed after destroying the base material. Summary of the invention

[0004] The purpose of the present invention is to provide an embedded nut and a method which can be repeatedly disassembled on a metal sheet, a pipe fitting and a curved surface. The embedded nut can be repeatedly installed and disassembled without damaging the base material, which is very convenient.

[0005] The technical solution of the present invention is: an embedded nut that can be repeatedly disassembled on a metal sheet, a pipe fitting and a curved surface, the embedded nut can pass through a slot opened on a substrate and enter into a substrate or the back of the substrate, the embedded nut comprises a nut body, the upper and lower sides of the nut body are provided with radially protruding wing plates, the thickness of the wing plates is less than the thickness of the nut body so that at least one end face of the nut body forms a positioning step of the axially protruding wing plate, the local contour line of the nut body is meshed with the local contour line of the slot so that the embedded nut is stuck on the slot after being rotated a certain angle.

[0006] Furthermore, the wing surface of the wing plate has the same curvature as the inner wall of the substrate or the back surface of the substrate.

[0007] Furthermore, the wing surface of the wing plate is a plane, a cylindrical surface, a frustum or a spatial curved surface.

[0008] Furthermore, the outer contour of the nut body is a polygonal structure with more than four sides, and the outer contour of the wing plate is a rectangular or arc-shaped structure.

[0009] Furthermore, the portion of the positioning step protruding from the inner wall of the substrate is a flat surface or a curved surface.

[0010] Furthermore, both end surfaces of the nut body form positioning steps of the axially protruding wing plates.

[0011] Furthermore, one side wing surface of the wing plate is a plane, and the other side wing surface is a cylindrical surface or a curved surface; or the wing surfaces on both sides of the wing plate are curved surfaces with different curvature radii.

[0012] A method for repeatedly removing embedded nuts on a metal sheet, a pipe fitting, and a curved surface, comprising the embedded nuts that can be repeatedly removed on a metal sheet, a pipe fitting, and a curved surface, and the steps are as follows: 1) Open a notch on the base material that matches the outer contour of the embedded nut; 2) Insert the embedded nut through the slot and completely into the base material or the back of the base material; 3) After rotating the embedded nut for a certain angle, the local contour line of the nut body is meshed with the local contour line of the slot to complete the positioning of the positioning step and the slot.

[0013] Furthermore, when the base material is a pipe fitting, after the embedded nut is positioned with the notch, one end of a screw is screwed into the embedded nut, and the other end of the screw supports the pipe wall on the opposite side of the pipe fitting notch; when the length of the screw is changed, the embedded nut can be transformed into an embedded screw.

[0014] Furthermore, when the substrate is a curved substrate, the positioning step does not protrude from the curved substrate; when the substrate is a flat substrate, the positioning step protrudes from the outer wall of the flat substrate and is used as a positioning portion.

[0015] Compared with the prior art, the present invention has the following advantages: The patent of this invention provides a pre-embedded nut that can be repeatedly installed and disassembled for metal sheets that are inconvenient to tap, especially curved surfaces such as pipes (round tubes), and does not damage the base material, which is very convenient. It not only solves the problem that nuts / screws cannot be embedded on curved surfaces and thin plates, but also provides unlimited convenience for product assembly, packaging, transportation, installation, use and recycling, especially its removable characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The embedded nuts, notches and installation diagrams of various shapes of the present invention are shown; Figure 2 It is a schematic diagram of the matching between the curved substrate and the embedded nut of the present invention; Figure 3 It is a schematic diagram of the cooperation between the planar substrate and the embedded nut of the present invention; Figure 4 A schematic diagram of an embedded nut with double positioning steps of a shape of the present invention; Figure 5It is a schematic diagram of an embedded nut with double positioning steps of another shape of the present invention; Figure 6 This is a schematic diagram of the cooperation between the embedded nut and the pipe fitting of the present invention; Figure 7 It is a schematic diagram of the embedded nut and the screw rod of the present invention forming an embedded screw; Figure 8 This is a schematic diagram of the cooperation between the embedded nut and the workpiece of the present invention; Fig. 9 It is a schematic diagram of the step positioning of the embedded nut of the present invention; Fig.10 It is a schematic diagram of the stepless positioning of the embedded nut of the present invention; In the figure: 10 - embedded nut 11 - nut body 12 - wing plate 13 - positioning step 14 - wing surface 15 - plane 16 - curved surface 20 - base material 21 - notch 22 - long groove 23 - arc-shaped recess 24 - round tube 25 - screw. DETAILED DESCRIPTION

[0017] In order to make the above features and advantages of the present invention more easily understood, embodiments are given below with reference to the accompanying drawings for detailed description, but the present invention is not limited thereto.

[0018] Example 1 Reference Figures 1 to 3 A pre-embedded nut 10 which can be repeatedly disassembled on a metal sheet, a pipe fitting and a curved surface, the pre-embedded nut is a directional step nut, and can pass through a notch 21 (through the outer surface and wall thickness of the substrate) provided on a substrate 20 to completely enter the substrate or the back side of the substrate, the pre-embedded nut comprises a nut body 11, the upper and lower sides of the nut body are provided with radially protruding wing plates 12, the thickness of the wing plates is less than the thickness of the nut body so that a positioning step 13 of the axially protruding wing plate is formed on one end face of the nut body, the local contour line of the nut body is meshed with the local contour line of the notch so that after the pre-embedded nut is rotated by a certain angle (which can be 90 degrees or other, for example, the last example is rotated by 60 degrees), it is positioned by relying on the protruding positioning step and is stuck on the edge of the substrate notch, that is, stuck on the notch.

[0019] In this embodiment, the outer contour of the nut body is a polygonal structure with more than four sides, such as a rectangle, a hexagon, a plum blossom, etc.; the outer contour of the wing plate is a rectangular or arc-shaped structure, for example, the outer contour of the wing plate is a rectangular structure and the width is equal to the width of one side of the nut body and fits with one side of the nut body, or the outer contour of the wing plate is a rectangle and is arranged at the corners of the adjacent two sides of the nut body.

[0020] In this embodiment, the outer contour of the notch is adapted to the outer contour of the embedded nut, so that the embedded nut can pass through the notch and extend into the substrate or the back of the substrate. Figure 1 .

[0021] In this embodiment, the wing surface 14 of the wing plate has the same curvature as the inner wall of the substrate or the back of the substrate, ensuring that the wing surface is closely fitted to the inner wall or the back of the substrate. Specifically, the wing surface of the wing plate can be a plane, a cylindrical surface or a truncated cone surface of a plane curved surface, or a spatial curved surface such as a hyperbolic surface or a spherical surface, which can be determined according to the shape of the inner wall or the back of the substrate.

[0022] In this embodiment, the portion of the positioning step protruding from the inner wall of the substrate can be made into a flat surface or a curved surface as required. And the portion of the positioning step protruding from the inner wall of the substrate can be kept on the inner side of the outer wall of the substrate (circular tube), see Figure 2 ; It can also protrude from the outer wall of the substrate for positioning, see Figure 3 .

[0023] Example 2 Reference Figure 4 and Figure 5 The difference between this embodiment and the first embodiment is that both end surfaces of the nut body form positioning steps for axially protruding wing plates. Specifically, one side wing surface of the wing plate is a plane 15, and the other side wing surface is a cylindrical surface or a curved surface 16 with a curvature radius of R25mm, so that it can be used for both planes or square tubes and curved surfaces (circular tubes), see Figure 4 Or the wing surfaces on both sides of the wing plate are curved surfaces with different curvature radii, such as the curvature radius of one surface is R25mm and the curvature radius of the other surface is R20mm, so that it can be used on curved surfaces with different curvature radii, see Figure 5 .

[0024] A method for repeatedly removing embedded nuts on a metal sheet, a pipe fitting, and a curved surface, comprising the embedded nuts that can be repeatedly removed on a metal sheet, a pipe fitting, and a curved surface, and the steps are as follows: 1) A notch 21 matching the outer contour of the embedded nut 10 is formed on the substrate 20; 2) Insert the embedded nut 10 through the notch 21 and completely into the substrate 20 or the back side of the substrate; 3) After rotating the embedded nut for a certain angle, the local contour line of the nut body is meshed with the local contour line of the slot to complete the positioning of the positioning step and the slot.

[0025] Specifically, a round tube with a wall thickness of 1.5 mm and an outer diameter of 28 mm is taken as an example. This is only an example, and the method is also applicable to flat thin plates or other curved surfaces. The specific method steps are as follows: 1) A notch 21 matching the outer contour of the embedded nut is opened on the round tube. The characteristic of this notch is that it can be opened in various shapes according to needs. Here are examples of several suitable notch shapes and embedded nuts matching them, see Figure 1 ; 2) Pass the embedded nut through the outer surface and wall thickness of the round tube through the notch and completely enter the round tube; 3) After the embedded nut is rotated to a certain angle (it can be 90 degrees or other angles, such as 60 degrees), the local contour line of the nut body is meshed with the local contour line of the notch, and the positioning step and the notch are positioned, that is, the nut is stuck on the notch; 4) After the embedded nut is positioned with the notch, screw one end of a screw into the embedded nut, and the other end of the screw presses against the pipe wall on the opposite side of the pipe notch to complete the pre-embedded nut. Figure 6 ; By changing the length of the screw, the embedded nut can be transformed into an embedded screw, see Figure 7 The embedded nut can be removed by rotating the screw in the opposite direction to disengage it from the opposite side of the pipe wall.

[0026] In another embodiment, when the workpiece needs to be fixed, the embedded nut can be temporarily implanted by using the cooperation between the workpiece and the screw, see Figure 8 .

[0027] In addition to implanting the embedded nut at a fixed position, the embedded nut can also be positioned in steps and steplessly by matching the shape of the notch on the substrate (round tube) with the embedded nut. For example, a long groove 22 is formed on the substrate, and arc-shaped recesses 23 matching the arc-shaped protrusions on the nut body of the embedded nut are arranged at intervals and offset along the length direction of the long groove, thereby achieving step positioning of the embedded nut. Fig. 9 Or a long groove 22 is opened on the substrate, and the outer contour of the nut body of the embedded nut is a rectangle, so that the embedded nut can slide in the long groove to achieve stepless positioning of the embedded nut, see Fig.10 .

[0028] The above description is only a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, designing different forms of embedded nuts and methods that can be repeatedly disassembled on metal sheets, pipes and curved surfaces does not require creative labor. Without departing from the principles and spirit of the present invention, all equal changes, modifications, substitutions and variations made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. An embedded nut that can be repeatedly disassembled on a metal sheet, a pipe fitting, and a curved surface, characterized in that: The embedded nut can pass through a slot opened on the substrate and enter into the substrate or the back of the substrate. The embedded nut comprises a nut body. The upper and lower sides of the nut body are provided with radially protruding wing plates. The thickness of the wing plate is less than the thickness of the nut body so that at least one end face of the nut body forms a positioning step of the axially protruding wing plate. The local contour line of the nut body is meshed with the local contour line of the slot so that the embedded nut is stuck on the slot after being rotated a certain angle.

2. The embedded nut that can be repeatedly removed on a metal sheet, a pipe fitting and a curved surface according to claim 1 is characterized in that: The wing surface of the wing plate has the same curvature as the inner wall of the substrate or the back surface of the substrate.

3. The embedded nut that can be repeatedly removed on a metal sheet, a pipe fitting and a curved surface according to claim 2 is characterized in that: The wing surface of the wing plate is a plane, a cylindrical surface, a frustum or a spatial curved surface.

4. The embedded nut that can be repeatedly removed on a metal sheet, a pipe fitting and a curved surface according to claim 1, 2 or 3, characterized in that: The outer contour of the nut body is a polygonal structure with more than four sides, and the outer contour of the wing plate is a rectangular or arc-shaped structure.

5. The embedded nut that can be repeatedly removed on a metal sheet, a pipe fitting and a curved surface according to claim 1 is characterized in that: The portion of the positioning step protruding from the inner wall of the substrate is a flat surface or a curved surface.

6. The embedded nut that can be repeatedly removed on a metal sheet, a pipe fitting and a curved surface according to claim 1, 2, 3 or 5, characterized in that: Both end surfaces of the nut body form positioning steps for axially protruding wing plates.

7. The embedded nut that can be repeatedly removed on a metal sheet, a pipe fitting and a curved surface according to claim 6 is characterized in that: One side wing surface of the wing plate is a plane, and the other side wing surface is a cylindrical surface or a curved surface; or the wing surfaces on both sides of the wing plate are curved surfaces with different curvature radii.

8. A method for repeatedly removing embedded nuts on metal sheets, pipes and curved surfaces, comprising the embedded nuts that can be repeatedly removed on metal sheets, pipes and curved surfaces according to claim 1, 2, 3, 5 or 7, characterized in that: Here are the steps: 1) Open a notch on the base material that matches the outer contour of the embedded nut; 2) Insert the embedded nut through the slot and completely into the base material or the back of the base material; 3) After rotating the embedded nut for a certain angle, the local contour line of the nut body is meshed with the local contour line of the slot to complete the positioning of the positioning step and the slot.

9. The method for repeatedly removing embedded nuts on metal sheets, pipes and curved surfaces according to claim 8, characterized in that: When the base material is a pipe fitting, after the embedded nut is positioned with the notch, one end of a screw is screwed into the embedded nut, and the other end of the screw presses against the pipe wall on the opposite side of the notch of the pipe fitting; when the length of the screw is changed, the embedded nut can be transformed into an embedded screw.

10. The method for repeatedly removing embedded nuts on metal sheets, pipes and curved surfaces according to claim 8, characterized in that: When the substrate is a curved substrate, the positioning step does not protrude from the curved substrate; when the substrate is a flat substrate, the positioning step protrudes from the outer wall of the flat substrate and is used as a positioning portion.

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