CN214661394U - Single-side connecting fastener - Google Patents

Abstract

The utility model relates to a single face connecting fastener, including warping cover and dowel steel, the dowel steel includes the core bar and locates the pin fin on core bar top, and the bottom surface size of pin fin is greater than the hole size that warp the cover, and the cross sectional dimension of core bar is less than the hole size that warp the cover, and when the core bar passed warp the cover hole, the bottom surface of pin fin can contact with the top surface that warp the cover, and the global bottom of core bar is equipped with prevents changeing the tooth, and the global middle part of core bar is equipped with the screw thread that is located and prevents changeing tooth top, and the middle part of core bar still is equipped with the rupture tank. The utility model discloses a but single face connection fastener single face operation and connection fastening degree are high.

Description

Single-side connecting fastener

Technical Field

The utility model relates to a fastener especially relates to a single face connection fastener.

Background

As a fastening type machine part, a bolt or a screw is widely used for fastening various devices such as a vehicle, a ship, a railway, a bridge, a building, and a tool. During connection, an operator needs to respectively penetrate through the through holes of the two parts by one end of the bolt or the screw, and connect the nut with the bolt or the screw at the other end of the parts so as to fasten the two parts. In this fastening method, the operator needs to separately operate the bolt and the nut on both sides of the part, and in some special applications, the operator can only operate the connection from one side. In this case, a general bolt or screw cannot be applied. Therefore, some manufacturers fasten two parts by using rivets capable of being operated on one side, however, the conventional rivet riveting cannot achieve the fastening degree of bolt connection, the connection mode has no problem in application occasions with low requirements on the fastening degree, the connection mode cannot be used in application occasions with high requirements on the connection fastening degree, and otherwise, equipment is damaged after being used for a long time, so that the risk of accidents is caused. In addition, in some applications, manufacturers connect parts by welding, which, on one hand, has a low clamping force between the parts to be connected and cannot achieve the strength of bolt connection, and on the other hand, the parts after welding are troublesome to disassemble. To this end, it is imperative to develop a new type of blind fastener.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the present invention provides a single-sided connection fastener which can be operated in a single-sided manner and has high connection tightness.

The utility model discloses a single face connecting fastener, including warping cover and dowel steel, the dowel steel includes the core bar and locates the pin fin on core bar top, the bottom surface size of pin fin is greater than the hole size that warp the cover the cross-sectional dimension of core bar is less than the hole size that warp the cover, and when the core bar passed warp the cover hole, the bottom surface of pin fin can contact with the top surface that warp the cover, and the global bottom of core bar is equipped with prevents changeing the tooth, and the global middle part of core bar is equipped with and is located the screw thread that prevents changeing tooth top, and the middle part of core bar still is equipped with the rupture tank.

Further, the utility model discloses a single face coupling fastener still includes the adapter sleeve, and the adapter sleeve includes the flange of adapter sleeve body and adapter sleeve body bottom, the hole of adapter sleeve can be passed to the core bar.

Further, the utility model discloses a fastener is connected to single face, the core bar includes core bar upper portion and core bar lower part, and the diameter on core bar upper portion is greater than the diameter of core bar lower part, core bar upper portion with warp the cover adaptation.

Furthermore, the utility model discloses a single face connecting fastener still includes with the nut of the last screw thread adaptation of core bar.

Furthermore, the utility model discloses a single face connecting fastener, the fracture groove is located the screw thread middle part of core bar.

Borrow by above-mentioned scheme, the utility model discloses at least, have following advantage: the utility model discloses a single face connecting fastener, operating personnel only need pass the part hole in the part one side with single face connecting fastener and in same face operating nut and core bar can, its concrete operating mode can be manual or through the electric tool who establishes specially. Compared with the existing bolt connection mode, the bolt connection mode has the advantages that the bolt connection strength is kept, meanwhile, an operator can operate on the single face of a part during connection, and the bolt connection mode is very suitable for application occasions which have high requirements on tightness and can only operate on the single face.

To sum up, the utility model discloses a but single face connection fastener single face operation and connection fastening degree are high.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

FIG. 1 is a schematic view of a blind attachment fastener;

FIG. 2 is a schematic structural view of a dowel bar;

FIG. 3 is a schematic structural view of a deformation sleeve;

FIG. 4 is a schematic structural diagram of the connecting sleeve;

FIG. 5 is a view showing a state of use of the blind fastener.

In the figure, a deformation sleeve 1, a dowel bar 2, a core bar 3, a nail head 4, an anti-rotation tooth 5, a thread 6, a fracture groove 7, a connecting hole 8, a connecting sleeve 9, a nut 10, a connecting sleeve body 11, a connecting flange 12, a core bar upper part 13, a core bar lower part 14 and a connected part 15.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Referring to fig. 1 to 5, the utility model discloses a single face connection fastener of a preferred embodiment, including warping cover 1 and dowel steel 2, the dowel steel includes core bar 3 and locates the pin fin 4 on core bar top, the bottom surface size of pin fin is greater than the hole size of warping the cover, the cross-sectional dimension of core bar is less than the hole size of warping the cover, when the core bar passes warp the cover hole, the bottom surface of pin fin can contact with the top surface of warping the cover, the global bottom of core bar is equipped with prevents that tooth 5, the global middle part of core bar is equipped with and is located the screw thread 6 of preventing the tooth top, the middle part of core bar still is equipped with rupture tank 7.

The utility model discloses a single face connecting fastener through the setting of deformation cover and core bar, has realized the mesh that the single face operation can fasten the part, and has compared in current riveting mode, and it connects the fastening degree higher.

The following is a specific operation of the blind fastener of this embodiment:

before connection, the operator first passes the single-sided connecting fastener, i.e. the core rod, through the connecting bore 8 of the connected part 15. The end of the deformation sleeve is now in contact with the workpiece surface or the end of the connection sleeve. Then, an operator can fix the core rod through the anti-rotation teeth at the end part of the core rod, and then the nut can be rotated through a corresponding tool. As the pin head moves, the pin head gradually presses and deforms the deformation sleeve until the part is fastened between the nut and the deformation sleeve. And finally, the operator breaks the core rod at the fracture groove.

As can be seen from the above description, the single-sided connection fastener of the present invention, when connecting, the operator only needs to pass the inner hole of the part through the single-sided connection fastener at the same side of the part and operate the nut and the core rod at the same side, and the specific operation mode can be manual or by a specially-designed electric tool. Compared with the existing bolt connection mode, the bolt connection mode has the advantages that the bolt connection strength is kept, meanwhile, an operator can operate on the single face of a part during connection, and the bolt connection mode is very suitable for application occasions which have high requirements on tightness and can only operate on the single face.

Preferably, the fastener is further provided with a connecting sleeve 9, the connecting sleeve comprises a connecting sleeve body 11 and a connecting flange 12 at the bottom end of the connecting sleeve body, and the core rod can pass through the inner hole of the connecting sleeve.

The arrangement of the connecting sleeve further facilitates the fastening operation of the parts by operators. During connection, the connecting sleeve body penetrates through the connecting hole of the connected part, the end part of the connecting sleeve body is in contact with the deformation sleeve on the other side of the part, and meanwhile, the inner side surface of the flange is in contact with the surface of the part. Thereafter, the operator inserts the anti-rotation teeth of the end of the core rod into the interior of the special tool, at which point the end of the special tool is just against the surface of the connecting flange. The operator then starts the special tool, causing it to rotate the nut. When the parts are compressed, the special tool can automatically break the core rod.

Preferably, the single-sided connecting fastener of the utility model discloses a core bar includes core bar upper portion 13 and core bar lower part 14, and the diameter on core bar upper portion is greater than the diameter of core bar lower part, core bar upper portion and deformation cover adaptation.

Preferably, the fastener for single-sided connection of the present invention further comprises a nut 10 adapted to the thread of the core rod.

Preferably, the single-sided connecting fastener of the present invention has a fracture groove located in the middle of the thread of the core rod.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that the invention can be implemented in other specific forms by a person skilled in the art without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description.

Furthermore, the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention. Also, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (5)

1. A blind-mate fastener characterized by: including warping cover (1) and dowel steel (2), the dowel steel includes core bar (3) and pin fin (4) of locating the core bar top, the bottom surface size of pin fin is greater than the hole size that warp the cover, the cross-sectional dimension of core bar is less than the hole size that warp the cover, and when the core bar passed warp the cover hole, the bottom surface of pin fin can contact with the top surface that warp the cover, and the global bottom of core bar is equipped with prevents changeing tooth (5), and the global middle part of core bar is equipped with and is located screw thread (6) of preventing changeing the tooth top, and the middle part of core bar still is equipped with rupture tank (7).

2. The blind attachment fastener of claim 1 wherein: the connecting sleeve is characterized by further comprising a connecting sleeve (9), the connecting sleeve comprises a connecting sleeve body (11) and a connecting flange (12) at the bottom end of the connecting sleeve body, and the core rod can penetrate through an inner hole of the connecting sleeve.

3. The blind attachment fastener of claim 1 wherein: the core rod comprises a core rod upper part (13) and a core rod lower part (14), the diameter of the core rod upper part is larger than that of the core rod lower part, and the core rod upper part is matched with the deformation sleeve.

4. The blind attachment fastener of claim 1 wherein: and the nut (10) is matched with the threads on the core rod.

5. The blind attachment fastener of claim 1 wherein: the breaking groove is positioned in the middle of the thread of the core rod.

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