A fastener assembly

Abstract

The utility model belongs to the technical field of fastener, especially relates to a fastener assembly, include: first pin body, first pin body is the tubular structure, first pin body includes connecting portion and expansion part, connecting portion sets up on the one end of first pin body along the axial direction and is provided with the clamping slot, expansion part can be expanded along the radial direction and set up on the other end of first pin body along the axial direction, limiting piece, limiting piece is detachably installed on connecting portion, second pin body, second pin body includes limiting portion and contraction part, limiting portion sets up on the one end of second pin body along the axial direction, and contraction part can be contracted along the radial direction and set up on the other end of second pin body along the axial direction, still be provided with the clamping block on contraction part, and the clamping block and the clamping slot abut along the axial direction, the beneficial effects of the utility model are that the fastener assembly structure design is simple, has the assembly convenient and the advantage that not easy to loosen and separate while realizing rotatable connection between two materials, and the practicality is high.

Description

Technical Field

[0001] This utility model belongs to the field of fastener technology, and in particular relates to a fastener assembly. Background Technology

[0002] Currently, rotatable connection structures are widely used in daily life. In some low-load rotatable connection structures, such as bicycle brake arms and rotating arms of toy robots, a combination of fasteners, such as bolts, nuts, and flat washers, is usually used to achieve rotatable connection. Although this structure can achieve the rotatability of the structure, it is relatively troublesome to assemble, and the nuts are prone to loosening and falling off after long-term use. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned technical problems by providing a fastener assembly that solves those problems.

[0004] In view of this, the present invention provides a fastener assembly, comprising: The first pin is a cylindrical structure. The first pin includes a connecting part and an expanding part. The connecting part is located on one end of the first pin along the axial direction and has a slot. The expanding part is located on the other end of the first pin along the axial direction and can expand radially. A limiting component is detachably mounted on the connecting part; The second pin includes a limiting part and a contraction part. The limiting part is disposed on one end of the second pin along the axial direction, and the contraction part is disposed on the other end of the second pin along the axial direction in a radially contractible manner. The shrinkage section is also equipped with a locking block, which abuts against the locking groove along the axial direction.

[0005] Furthermore, the expansion section includes: Four first connecting pieces are integrally connected to the first pin body and arranged in a circular array.

[0006] Furthermore, the contraction section includes: Four second connecting pieces are integrally connected to the second pin and arranged in a circular array; The number of card blocks is two, and each is integrally connected to two symmetrically arranged second connecting pieces.

[0007] Furthermore, the contraction section also includes: The limiting protrusion is integrally connected to two other symmetrically arranged second connecting pieces and is arranged along the axial direction; Among them, the two symmetrically arranged first connecting pieces are provided with limiting grooves that are adapted to the limiting protrusion structure.

[0008] Furthermore, the limiting member is provided with a first fixing rod, and the first fixing rod has an axially arranged slot; The second pin is also provided with a second fixing rod, which is located in the middle of the four second connecting pieces and is inserted into the slot.

[0009] Furthermore, the limiting element is threaded onto the connecting part.

[0010] Furthermore, a cross groove is provided on the limiting component.

[0011] The beneficial effects of this utility model are: This fastener assembly has a simple structural design, which not only enables a rotatable connection between two materials, but also has the advantages of convenient assembly and resistance to loosening and detachment, making it highly practical. Attached Figure Description

[0012] Figure 1 This is an exploded view of the structure of this utility model; Figure 2 This is a cross-sectional view of the assembled structure of this utility model; The markings in the diagram are as follows: 1. First pin; 11. Connecting part; 12. Expanding part; 13. Slot; 2. Limiting component; 21. First fixing rod; 22. Slot; 23. Cross groove; 3. Second pin; 31. Limiting part; 32. Retracting part; 33. Locking block; 34. Limiting protrusion; 35. Second fixing rod. Detailed Implementation

[0013] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0014] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0015] Example 1: This embodiment provides a fastener assembly, including: The first pin 1 is a cylindrical structure. The first pin 1 includes a connecting part 11 and an expansion part 12. The connecting part 11 is disposed on one end of the first pin 1 along the axial direction and has a groove 13. The expansion part 12 is disposed on the other end of the first pin 1 along the axial direction in a radially expandable and contractible manner. Limiting member 2 is detachably mounted on connecting part 11; The second pin 3 includes a limiting part 31 and a contraction part 32. The limiting part 31 is disposed on one end of the second pin 3 along the axial direction, and the contraction part 32 is disposed on the other end of the second pin 3 along the axial direction in a radially expandable and contractible manner. The contraction section 32 is also provided with a locking block 33, which abuts against the locking groove 13 along the axial direction.

[0016] When using this fastener assembly, the limiting member 2 is first installed on the connecting portion 11 of the first pin 1, forming a nail-like structure with the limiting member 2. Then, by holding the limiting member 2, the first expansion portion 12 of the first pin 1 is passed through two materials to be connected, allowing the limiting member 2 to abut against one side of one of the materials. The diameter of the connecting holes on the two materials is slightly larger than the diameter of the first pin 1, creating a certain gap between the first expansion portion 12 and the materials, allowing the first expansion portion 12 to expand radially.

[0017] Then, the second expansion portion 12 of the second pin 3 is inserted into the cylindrical inner cavity of the first pin 1. During the insertion process, the locking block 33 on the second expansion portion 12 abuts against the first expansion portion 12 radially, applying a thrust to the first expansion portion 12 to cause it to deform and expand radially. After the second expansion portion 12 enters the interior of the first pin 1, the first pin 1 applies pressure to the locking block 33, causing the second expansion portion 12 to deform and contract radially, thereby allowing the second pin 3 to enter the first pin 1. After the locking block 33 moves into the slot 13, the locking block 33 moves radially outward to allow the second expansion portion 12 to return to its original position. The limiting portion 31 of the second pin 3 abuts against another material, thereby achieving a rotatable connection between the two materials.

[0018] The limiting component 2 is detachably installed on the first pin 1, which serves as an axial limiting component and also protects the locking block 33 inside the first pin 1, preventing the locking block 33 from being touched by external objects. This effectively prevents the locking block 33 from moving radially and causing the second pin 3 to detach from the first pin 1.

[0019] In summary, this fastener assembly has a simple structural design, which not only enables rotatable connection between two materials, but also has the advantages of convenient assembly and resistance to loosening and detachment, making it highly practical.

[0020] Example 2: This embodiment provides a fastener assembly that, in addition to the technical solutions described in the above embodiments, also has the following technical features.

[0021] Furthermore, the expansion section 12 includes: Four first connecting pieces are integrally connected to the first pin 1 and arranged in a circular array.

[0022] Furthermore, the contraction section 32 includes: Four second connecting pieces are integrally connected to the second pin 3 and arranged in a circular array; The number of card blocks 33 is two, and each is integrally connected to two symmetrically arranged second connecting pieces.

[0023] Through the above structural design, when the two symmetrically designed second connecting pieces are inserted into the first pin 1, the locking blocks 33 on the second connecting pieces radially compress the first connecting pieces, pushing the first connecting pieces to bend radially outward, thereby realizing the expansion movement of the first expansion portion 12. After the second connecting pieces enter the first pin 1, the inner wall of the second pin 3 will compress the locking blocks 33, pushing the second connecting pieces to bend radially inward, thereby realizing the contraction movement of the second expansion portion 12.

[0024] Example 3: This embodiment provides a fastener assembly that, in addition to the technical solutions described in the above embodiments, also has the following technical features.

[0025] Furthermore, the contraction section 32 also includes: The limiting protrusion 34 is integrally connected to two other symmetrically arranged second connecting pieces and is arranged along the axial direction; Among them, the two symmetrically arranged first connecting pieces are provided with limiting grooves that are adapted to the structure of the limiting protrusion 34.

[0026] In this technical solution, by providing limiting protrusions 34 on two other symmetrical second connecting pieces and limiting grooves on two opposing first connecting pieces, the limiting protrusions 34 are inserted axially into the limiting grooves during the insertion of the second expansion portion 12 into the first pin 1. This serves as a guide and positioning element for the assembly of the first pin 1 and the second pin 3, facilitating installation and improving practicality. Furthermore, the cooperation between the limiting protrusions 34 and the limiting grooves restricts the relative rotation between the first pin 1 and the second pin 3, enhancing structural stability and preventing wear caused by relative rotation, thus improving durability.

[0027] Example 4: This embodiment provides a fastener assembly that, in addition to the technical solutions described in the above embodiments, also has the following technical features.

[0028] Furthermore, the limiting member 2 is provided with a first fixing rod 21, and the first fixing rod 21 is provided with an axially arranged slot 22; The second pin 3 is also provided with a second fixing rod 35, which is located in the middle of the four second connecting pieces and is inserted into the slot 22.

[0029] Through this structural design, on the one hand, the insertion and engagement of the second fixing rod 35 and the slot 22 plays a positioning role in the connection between the first pin 1 and the second pin 3; on the other hand, the connection of the first fixing rod 21 and the second fixing rod 35 enhances the internal structural strength of the fastener assembly and improves its bending resistance and shear resistance.

[0030] Example 5: This embodiment provides a fastener assembly that, in addition to the technical solutions described in the above embodiments, also has the following technical features.

[0031] An external thread structure is provided on the connecting part 11, and the limiting member 2 is cap-shaped with an internal thread structure on its inner side. This structural design allows the limiting member 2 to be threadedly connected to the first pin 1 for easy assembly and disassembly. It is worth noting that during disassembly, the limiting part 31 needs to be axially pressed against the material to keep the first pin 1 and the second pin 3 fixed, and then the limiting member 2 can be screwed to achieve disassembly.

[0032] Furthermore, the limiting component 2 is provided with a cross groove 23. The cross groove 23 is designed to facilitate disassembly work by workers using a screwdriver.

[0033] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A fastener assembly, characterized in that, include: The first pin (1) is a cylindrical structure. The first pin (1) includes a connecting part (11) and an expansion part (12). The connecting part (11) is disposed on one end of the first pin (1) along the axial direction and has a slot (13). The expansion part (12) is disposed on the other end of the first pin (1) along the axial direction in a radially expandable manner. The limiting member (2) is detachably mounted on the connecting part (11); The second pin (3) includes a limiting part (31) and a contraction part (32). The limiting part (31) is disposed on one end of the second pin (3) along the axial direction, and the contraction part (32) is disposed on the other end of the second pin (3) along the axial direction in a radially contractible manner. The contraction part (32) is also provided with a locking block (33), which abuts against the locking groove (13) axially.

2. A fastener assembly according to claim 1, characterized in that, The expansion portion (12) includes: Four first connecting pieces are integrally connected to the first pin (1) and arranged in a circular array.

3. A fastener assembly according to claim 2, characterized in that, The contraction section (32) includes: Four second connecting pieces are integrally connected to the second pin (3) and arranged in a circular array; The number of the card blocks (33) is two, and they are integrally connected to two symmetrically arranged second connecting pieces.

4. A fastener assembly according to claim 3, characterized in that, The contraction section (32) further includes: The limiting protrusion (34) is integrally connected to two other symmetrically arranged second connecting pieces and is arranged along the axial direction; Among them, the two symmetrically arranged first connecting pieces are provided with limiting grooves that are adapted to the structure of the limiting protrusion (34).

5. A fastener assembly according to claim 3, characterized in that, The limiting member (2) is provided with a first fixing rod (21), and the first fixing rod (21) is provided with an axially arranged slot (22). The second pin (3) is also provided with a second fixing rod (35), which is located in the middle of the four second connecting pieces and is inserted into the slot (22).

6. A fastener assembly according to claim 4, characterized in that, The limiting member (2) is threaded onto the connecting part (11).

7. A fastener assembly according to claim 6, characterized in that, The limiting member (2) has a cross groove (23).

Images