TWM648570U - Fastening device - Google Patents

Abstract

A fastening device includes a first fastener and a second fastener. The first fastener includes a first barrel head and a first barrel body connected to each other. The second fastener includes a second barrel head and a second barrel body connected to each other. The second cylinder head is inserted into the first cylinder body part and cooperates with the second cylinder body part to form an internal thread. The second barrel portion abuts the first barrel portion and can squeeze the first fastener to deform the first barrel portion of the first fastener. This new innovation adopts a two-piece design in which the first fastener and the second fastener cooperate, which can provide the industry with more choices that are different from existing products and promote the development of healthy competition in the industry.

Description

Fastening device

The present invention relates to a device for fastening or fixing components or machine parts, and in particular, to a fastening device suitable for providing screw locks for workpieces with threads.

Referring to Figures 1 to 3, Patent No. M338296 discloses an existing fastening device, which includes a fastener 11 and a bottom plug 12 screwed at the bottom of the fastener 11. The fastener 11 includes a first cylindrical portion 13 and a second cylindrical portion 14 that are hollow cylindrical and integrally connected to each other.

A texture structure 131 is formed on the outer surface of the first barrel portion 13 . The texture structure 131 includes a plurality of grooves 132 extending in the axial direction and spaced apart from each other in the radial direction. An end of the first barrel portion 13 opposite to the second barrel portion 14 is formed with a flange 133 extending radially outward. The inner surface of the second barrel portion 14 is formed with an internal thread suitable for a bolt 15 to be screwed together.

The usage of this existing fastening device is as follows: insert the fastening device into a hole 161 of a plate 16 along an insertion direction D11, and use an electric machine to drive the bolt 15 to rotate. At this time, since the flange 133 is in contact with the target object, the fastening device cannot continue to move along the insertion direction D11. Therefore, the bolt 15 continues to rotate and is further inserted into the second barrel portion 14. During the process, the second cylinder part 14 will move in the direction opposite to the insertion direction D11, that is, the second cylinder part 14 will move towards the first cylinder part 13, thereby squeezing the first cylinder part 13. At this time, since the wall thickness of the first tube part 13 is thin and the texture structure 131 is formed, and the structure is relatively fragile, the first tube part 13 will be squeezed and deformed by the second tube part 14, thus The plate 16 is clamped in cooperation with the flange 133 , and the fastening device is positioned on the plate 16 .

Although this existing fastening device can create a joint point for the bolt 15 to be set on the plate 16 without screw holes for further thread locking of other components, another design that is different from the existing products still needs to be provided. , in order to provide consumers in the industry with more choices and promote the development of industrial competition.

The purpose of the present invention is to improve at least one of the shortcomings of the prior art.

The novel fastening device includes a first fastener and a second fastener.

The first fastener includes a first barrel head and a first barrel body connected to each other. The second fastener includes a second barrel head and a second barrel body connected to each other. The second cylinder head is inserted into the first cylinder body part and cooperates with the second cylinder body part to form an internal thread. The second barrel portion abuts the first barrel portion and can squeeze the first fastener to deform the first barrel portion of the first fastener.

The effect of this new type is that it innovatively adopts a two-piece design in which the first fastener and the second fastener are matched, which can provide the industry with more choices that are different from existing products and promote the development of healthy competition in the industry.

In the following description, similar or identical components will be represented by the same numbers.

Referring to Figures 4, 5 and 6, a first embodiment of the new fastening device is suitable for use with a nut 21 with anti-slip/anti-loosening function and a bolt 22.

The first embodiment includes a first fastener 3 and a second fastener 4 that are separable and coaxially sleeved and assembled with each other.

The first fastener 3 includes a first barrel head 31 and a first barrel portion 32 integrally connected to each other, and a texture structure 33 formed on the outer surface of the first barrel portion 32 .

A first wall thickness 311 of the first cylinder head 31 is greater than a second wall thickness 321 of the first cylinder body 32, and because the outer surface of the first cylinder head 31 and the first cylinder body 32 The outer surfaces of the first barrel head 31 are coplanar, so a first barrel head inner diameter 312 of the first barrel head 31 is smaller than a first barrel inner diameter 322 of the first barrel body 32 . The end of the first cylinder head 31 opposite to the first cylinder body 32 is not formed with a radially protruding flange, or the outer surface of the first cylinder head 31 is a flat cylindrical surface without an annular shape. protruding structure.

The second fastener 4 is inserted into the inner side of the first barrel portion 32 . Neither the inner surface of the first cylinder body 32 nor the inner surface of the first cylinder head 31 is threaded, but each has a flat cylindrical surface.

The texture structure 33 includes a plurality of grooves 331 formed on the outer surface of the first barrel portion 32 . The grooves 331 are spaced apart from each other in the arcuate direction, and each groove 331 extends lengthwise in the axial direction, and the extension length is approximately half of the axial length of the first fastener 3 . The texture structure 33 can produce an anti-slip effect.

The second fastener 4 includes a second cylinder head 41 and a second cylinder body 42 integrally connected to each other, and a drill head 43 integrally connected to the second cylinder body 42 .

A second barrel head outer diameter 411 of the second barrel head 41 is smaller than a second barrel outer diameter 421 of the second barrel body 42 . Since the outer diameter of the second barrel head 41 is relatively small, the second barrel head 41 can be inserted into the first barrel portion 32 so that the outer surface of the first barrel portion 32 is approximately the same as the outer diameter of the first barrel portion 32 . The outer surfaces of the second barrel portion 42 are positioned correspondingly in the radial direction.

The top end of the second barrel portion 42 abuts the bottom end of the first barrel portion 32 , and the second barrel portion 42 cooperates with the second barrel head 41 to form a hole suitable for screwing the bolt 22 . Internal thread 44.

The drill head 43 and the second barrel head 41 are respectively located at two opposite ends of the second barrel body 42 and can be used for tapping (drilling) into a target object 23 (see FIG. 6 ) according to the first embodiment.

Referring to Figures 5, 6, and 7, when the first embodiment is used, the nut 21 and the bolt 22 are assembled together as shown in Figure 6, and a sub-machine (not shown) passes through the bolt. 22 drives the second fastener 4 to rotate, so that the second fastener 4 can penetrate into the target object 23 . In the first embodiment, the target object 23 is made of wood, but in other embodiments of the present invention, the material of the target object 23 can also be cement or metal without special limitation.

When the second fastener 4 penetrates the target object 23 until the nut 21 abuts the target object 23, the nut 21 can be fixed through a fixing tool (not shown, such as a wrench), and then the nut 21 can be fixed through the The screwdriver drives the bolt 22 to rotate. At this time, due to the restriction of the nut 21, the bolt 22 can no longer drive the entire first embodiment to penetrate deeper into the target object 23, but the bolt 22 is in the thread. The bolt 22 will still be further screwed into the second fastener 4 under the action of The situation in Fastener 4 occurs. When the second fastener 4 moves toward the first fastener 3, the second barrel portion 42 will squeeze the first fastener 3, causing the thinner wall portion of the first fastener 3 ( That is, the first barrel portion 32 ) is bent and deformed into an annular structure as shown in FIG. 7 and is stuck in the target object 23 . Since the target object 23 is wood in the first embodiment, the deformation degree of the first barrel portion 32 is relatively complete. In other embodiments of the present invention, if the target object 23 is made of harder metal or cement, the deformation degree of the first barrel portion 32 will be smaller, but it can still be stuck in the target object 23 .

Referring to Figures 5, 7, and 8, after the first embodiment is successfully inserted into the target object 23, the bolt 22 and the nut 21 are screwed away from the first embodiment. The first embodiment is like an insert. The screw hole seat provided in the target object 23 allows other objects to be installed to be screw-locked with the target object 23 through other screw-lock fastening elements, which is quite convenient. Among them, the advantage of the first wall thickness 311 of the first barrel head 31 being thicker and the inner diameter 312 of the first barrel head being smaller is that when other screw lock fastening elements, such as other types of bolts, are inserted, It can ensure that the first barrel head 31 abuts the screw-lock fastening element, preventing the screw-lock fastening element from shaking relative to the first fastener 3, thereby reducing the risk of shaking relative to the target object 23 due to the first embodiment. Chance of loosening.

Referring to Figure 9, a second embodiment of the new fastening device is similar to the first embodiment, except that the first barrel portion 32 includes a bottom end and abuts against the second barrel portion 42. The first torus 323. The first annular surface 323 is inclined inwardly toward the radial direction of the second barrel portion 42 . The second barrel portion 42 includes a second annular surface 423 located at a top end and abutting against the first barrel portion 32 . The second annular surface 423 is inclined radially inward away from the first barrel portion 32 .

The characteristic of this second embodiment is that through the cooperation of the first annular surface 323 and the second annular surface 423, the first fastener 3 is squeezed on the second fastener 4 so that the first fastener 3 is During the deformation process of the first barrel portion 32 , the second fastener 4 is not easily displaced laterally left and right relative to the first fastener 3 , allowing the second fastener 4 to squeeze the first fastener 3 more accurately. .

Referring to Figure 10, a third embodiment of the new fastening device is similar to the first embodiment, except that the length of the drill head 43 of the second fastener 4 is lengthened, which can optimize the drilling process. The effect of eliminating waste chips and improving self-tapping efficiency.

Referring to Figure 11, the fourth embodiment of the present invention is similar to the first embodiment, except that the second fastener 4 omits the drill head 43 (see Figure 5). This fourth embodiment is suitable for objects with holes in advance. Since there is no need to drill holes by self-tapping, the drill head 43 can be omitted.

To sum up, the effect of this new fastening device is that it innovatively adopts a two-piece design in which the first fastener 3 and the second fastener 4 cooperate, and can provide the industry with more choices that are different from existing products. Promote the development of healthy industry competition.

The above are only examples of the present invention and cannot be used to limit the patentable scope of the present invention. Simple equivalent changes and modifications based on the patentable scope of the present invention and the patent specification should also be considered as the present invention. covered by the patent application.

21: Nut 22:bolt 23:Target object 3: First fastener 31:The head of the first tube 311: First wall thickness 312:Inner diameter of the first barrel head 32:The first barrel body 321: Second wall thickness 322:Inner diameter of the first barrel 323: First torus 33: Texture structure 331:Gutter 4: Second fastener 41:Second barrel head 411: Second barrel head outer diameter 42:Second barrel body 421: Second barrel outer diameter 423: Second torus 43:Drill head 44: Internal thread

Other features and functions of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a perspective view illustrating a conventional fastening device; Figure 2 is a partially cutaway sectional view illustrating the existing fastening device used with a plate; Figure 3 is a cross-sectional view illustrating the deformation of the existing fastening device; Figure 4 is an exploded perspective view illustrating a first embodiment of the new fastening device and a nut and a bolt suitable for use with the first embodiment; Figure 5 is a partially cutaway sectional view illustrating the first embodiment; Figure 6 is a cross-sectional view illustrating the first embodiment drilling into a target object; Figure 7 is a cross-sectional view illustrating the use process of the first embodiment, and a first barrel portion of a first fastener of the first embodiment is deformed; Figure 8 is a cross-sectional view illustrating that the nut and the bolt are removed and the first embodiment remains in the target object; Figure 9 is a partially cutaway sectional view illustrating a second embodiment of the novel fastening device; Figure 10 is a partially cutaway sectional view illustrating a third embodiment of the novel fastening device; and Figure 11 is a partially cutaway sectional view illustrating a fourth embodiment of the novel fastening device.

3: First fastener

31:The head of the first tube

311: First wall thickness

312:Inner diameter of the first barrel head

32:The first barrel body

321: Second wall thickness

322:Inner diameter of the first barrel

4: Second fastener

41:Second barrel head

411: Second barrel head outer diameter

42:Second barrel body

421: Second barrel outer diameter

43:Drill head

44: Internal thread

Claims (7)

A fastening device consisting of: A first fastener includes a first barrel head and a first barrel body connected to each other; and A second fastener includes a second barrel head and a second barrel body that are connected to each other. The second barrel head is inserted into the first barrel and is relative to the second barrel. An internal thread is formed in cooperation with the second barrel body portion to abut the first barrel portion and can squeeze the first fastener to deform the first barrel portion of the first fastener. The fastening device according to claim 1, wherein the first barrel portion includes a first annular surface that abuts the second barrel portion, and the first annular surface faces radially inward toward the second barrel portion. Inclined, the second barrel portion includes a second annular surface abutting the first barrel portion, and the second annular surface is inclined radially inward away from the first barrel portion. The fastening device as claimed in claim 1, wherein the second fastener further includes a drill part connected to the second cylinder body part and opposite to the second cylinder head part. The fastening device as claimed in claim 1, wherein a first wall thickness of the first barrel head is greater than a second wall thickness of the first barrel body, and a first wall thickness of the first barrel head The inner diameter of the barrel head is smaller than a first barrel inner diameter of the first barrel portion. The fastening device according to any one of claims 1 to 4, wherein the first fastener further includes a texture structure formed on the outer surface of the first barrel part. The fastening device as claimed in claim 4, wherein a second barrel head outer diameter of the second barrel head is smaller than a second barrel outer diameter of the second barrel body. The fastening device as claimed in claim 4, wherein an end of the first barrel head opposite to the first barrel body is not formed with a radially outwardly protruding flange, and the inner surface of the first barrel head is in contact with the first barrel head. The inner surface of the first barrel portion is not threaded.

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