Combined fastener structure

Abstract

The utility model relates to the technical field of fasteners, specifically a combined fastener structure, including a screw body and a gasket; the gasket includes a fitting part a and a fitting part b; the fitting part b is connected to the fitting part a, and the fitting part b is provided with a through hole for the screw body to pass through the gasket; in the use state, the fitting part b presses the head, and the fitting part a presses the object to be fastened. The combined fastener structure provided by the utility model only includes two parts, and the flat washers and spring washers in the prior art are replaced by gaskets. When the combined fastener structure is used to lock an object, a wrench is used to rotate the head in conjunction with a groove to lock the object. The fitting part b plays the role of preventing the spring washer from loosening, and the fitting part a plays the role of locking the flat washer. The combined fastener structure has a simple structure, reduces production costs, and improves the stability of automated assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a combined fastener structure. Background Art

[0002] As attached Figure 1 The figure shows an existing combined screw structure, which mainly includes a screw body 1, a flat washer 2 and a spring washer 3; however, the above structure consists of three parts, and requires high-precision equipment and fixtures to assemble during the manufacturing process, resulting in low production efficiency. Utility Model Content

[0003] The utility model aims to provide a combined fastener structure in view of the problems existing in the background technology.

[0004] The technical solution of the utility model: a combined fastener structure, including a screw body and a gasket;

[0005] The gasket includes a fitting part a and a fitting part b; the fitting part b is connected to the fitting part a, and a through hole is provided on the fitting part b for the screw body to pass through the gasket; in the use state, the fitting part b presses the head, and the fitting part a presses the object to be fastened.

[0006] Preferably, the screw body includes a head, a mating part and a screw rod; the head, the mating part and the screw rod are connected in sequence; the outer diameter value of the head and the outer diameter value of the screw rod are both greater than the outer diameter value of the mating part; the end face of the screw rod and the outer peripheral surface of the mating part are connected by an arc transition; a groove is provided on the end face of the head away from the mating part.

[0007] Preferably, the notch shape of the groove is a regular polygon.

[0008] Preferably, a guide portion is provided at one end of the screw portion away from the fitting portion; and an outer diameter of the guide portion gradually decreases along the axis thereof toward a side away from the screw portion.

[0009] Preferably, the head portion, the matching portion, the screw portion and the guide portion are an integrated structure.

[0010] Preferably, the outer diameter of the fitting portion b is smaller than the outer diameter of the fitting portion a.

[0011] Preferably, the fitting portion a and the fitting portion b are an integrated structure.

[0012] Preferably, the cross-sectional shape of the fitting portion b is a circle or a regular polygon.

[0013] Preferably, the inner diameter of the through hole is greater than the outer diameter of the matching portion, and the inner diameter of the through hole is smaller than the outer diameter of the screw portion.

[0014] Preferably, the hole shape of the through hole is a regular polygon; the cross section of the screw portion is a circle; and the projection shape of the matching portion is the same as the hole shape of the through hole.

[0015] Compared with the prior art, the above technical solution of the utility model has the following beneficial technical effects:

[0016] The combined fastener structure provided by the utility model only includes two parts. The flat washers and spring washers in the prior art are replaced by gaskets. When the combined fastener structure is used to lock an object, a wrench is used to cooperate with the groove to rotate the head to lock the object. The function of the fitting part b is to prevent the spring washer from loosening, and the function of the fitting part a is to lock the flat washer. The combined fastener structure is simple, the production cost is reduced, and the stability of automated assembly is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an existing combination screw.

[0018] Figure 2 This is a three-dimensional diagram of an embodiment of the present invention.

[0019] Figure 3 for Figure 2 A three-dimensional view of the fastener body.

[0020] Figure 4 and Figure 5 All are three-dimensional images of gaskets.

[0021] Figure numerals: 1. screw body; 2. flat washer; 3. spring washer; 4. head; 41. groove; 5. fitting part; 6. screw part; 7. guide part; 8. gasket; 81. fitting part; 82. fitting part b; 83. through hole. DETAILED DESCRIPTION

[0022] like Figure 2-5 As shown, a combined fastener structure proposed by the utility model includes a screw body 1 and a gasket 8;

[0023] The screw body 1 includes a head 4, a matching portion 5 and a screw portion 6; the head 4, the matching portion 5 and the screw portion 6 are connected in sequence, and the central axes of the head 4, the matching portion 5 and the screw portion 6 coincide; the outer diameter values ​​of the head 4 and the outer diameter values ​​of the screw portion 6 are both greater than the outer diameter value of the matching portion 5; the outer circumferential surface of the screw portion 6 is evenly provided with external threads, and the external threads on the screw portion 6 are not shown in the figure, and the end face of the screw portion 6 and the outer circumferential surface of the matching portion 5 are connected by an arc transition; wherein, a groove 41 is provided on the end face of the head 4 away from the matching portion 5 for rotating the head 4 when using a wrench.

[0024] In an optional embodiment, the notch shape of the groove 4 is a regular polygon, wherein the notch shape of the groove 4 is selected from but not limited to a regular hexagon.

[0025] In another optional embodiment, a guide portion 7 is provided at one end of the screw portion 6 away from the mating portion 5; the central axis of the guide portion 7 coincides with the central axis of the screw portion 6, and the outer diameter of the guide portion 7 gradually decreases along the central axis direction toward the side away from the screw portion 6, wherein the head portion 4, the mating portion 5, the screw portion 6 and the guide portion 7 are an integrated structure.

[0026] The gasket 8 includes a fitting portion a81 and a fitting portion b82; the outer diameter of the fitting portion b82 is smaller than the outer diameter of the fitting portion a81, the fitting portion b82 is connected to the fitting portion a81, the central axis of the fitting portion b82 coincides with the central axis of the fitting portion a81, and the fitting portion b82 is provided with a through hole 83 for allowing the screw body 1 to pass through the gasket 8; in use, the fitting portion b82 presses the head 4, the fitting portion a81 presses the object to be fastened, and the end face of the fitting portion a81 away from the head 4 is a plane.

[0027] In an optional embodiment, the inner diameter of the through hole 83 is greater than the outer diameter of the matching portion 5 , and the inner diameter of the through hole 83 is smaller than the outer diameter of the screw portion 6 .

[0028] In an optional embodiment, the hole shape of the through hole 83 is a regular polygon; the cross section of the screw portion 6 is a circle; and the projection shape of the matching portion 5 is the same as the hole shape of the through hole 83 .

[0029] In an optional embodiment, the fitting portion a81 and the fitting portion b82 are an integrated structure, and the fitting portion b82 is obtained after a stamping device applies an external force on the fitting portion a81 so that a portion of the fitting portion a81 is raised, wherein the cross-sectional shape of the fitting portion b82 when the through hole 83 is not provided is a circle or a regular polygon.

[0030] The combined fastener structure provided by the utility model only includes two parts. The flat washer 2 and the spring washer 3 in the prior art are replaced by a gasket 8. When the combined fastener structure is used to lock an object, a wrench is used to cooperate with the groove 41 to rotate the head 4 to lock the object. The function of the fitting part b82 is to prevent the spring washer 3 from loosening, and the function of the fitting part a81 is to lock the flat washer 2. The combined fastener structure is simple, reduces production costs, and improves the stability of automated assembly.

[0031] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A combined fastener structure, comprising a screw body (1); characterized in that: Also includes a gasket (8); The gasket (8) comprises a fitting portion a (81) and a fitting portion b (82); the fitting portion b (82) is connected to the fitting portion a (81), and the fitting portion b (82) is provided with a through hole (83) for allowing the screw body (1) to pass through the gasket (8); in a state of use, the fitting portion b (82) presses the head (4), and the fitting portion a (81) presses the object to be fastened.

2. A combined fastener structure according to claim 1, characterized in that: The outer diameter of the fitting portion b (82) is smaller than the outer diameter of the fitting portion a (81).

3. A combined fastener structure according to claim 2, characterized in that: The bonding part a (81) and the bonding part b (82) are an integrated structure.

4. A combined fastener structure according to claim 1 or 2, characterized in that: The cross-sectional shape of the fitting portion b (82) is a circle or a regular polygon.

Images