CN107100925B

CN107100925B - Efficient fastener metal flat gasket

Info

Publication number: CN107100925B
Application number: CN201710411625.0A
Authority: CN
Inventors: 王长土
Original assignee: Changhua Holding Group Co ltd
Current assignee: Changhua Holding Group Co ltd
Priority date: 2017-06-05
Filing date: 2017-06-05
Publication date: 2023-01-03
Anticipated expiration: 2037-06-05
Also published as: CN107100925A

Abstract

The invention provides a high-efficiency fastener metal flat gasket which is a flat hollow sheet body, the outer edge of the gasket is in an arc shape, the inner edge of the gasket is in a flower tooth shape and consists of a plurality of arcs, the arcs comprise a plurality of first arcs and a plurality of second arcs, and the diameter of each first arc is smaller than that of each second arc. The gasket solves the problem of small fit clearance between the gasket and the bolt rod part, so that shot blasting particles cannot be clamped during zinc-aluminum coating shot blasting, and the problem that the gasket cannot rotate freely due to shot blasting is solved.

Description

Efficient fastener metal flat gasket

Technical Field

The invention relates to a part for automobile fastening, in particular to a high-efficiency fastener metal flat gasket used on a bolt with a zinc-aluminum coating surface treatment.

Background

With the development of science and technology, the technology is advanced, automobile products are changed day by day, and almost indispensable articles are necessary for daily life of people, and each component part is preset according to design requirements during the design of the automobile and is assembled by connecting pieces and fasteners. These components, connectors and fasteners are used together to ensure the safety and comfort of the vehicle. Fasteners are a very widely used class of mechanical parts for fastening connections. A wide variety of fasteners are found on a variety of machines, equipment, vehicles, boats, railways, bridges, buildings, structures, tools, instruments, gauges, supplies, and the like. With the addition of WTO in 2001, china enters the line of the international trade republic of China. A great number of fastener products in China are exported to countries all over the world, and fastener products in countries all over the world are continuously in the China market. The fastener is one of products with large import and export quantity in China to realize international rail connection, and has important practical significance and strategic significance for promoting Chinese fastener enterprises to move to the world and promoting the fastener enterprises to fully participate in international cooperation and competition.

The fasteners are also divided into different types according to different purposes, and novel fastener types are developed according to the requirements of special environments, so that the requirements of various industries are met. The gasket combination bolt is used as a common fastening bolt, the surface of a connected piece is protected from being scratched by the combination gasket, the pressure of the connected piece is dispersed, the sealing and anti-loosening effects are widely applied, and along with the continuous improvement of the environmental protection requirement, the novel zinc-aluminum coating surface treatment gradually becomes a mainstream surface treatment process because the zinc-aluminum coating surface treatment meets the environmental protection requirement, has attractive surface and is higher in corrosion resistance than the zinc-nickel coating surface treatment.

The existing gasket structure form cannot fall off from a bolt due to the consideration of the assembly and the assembly of the gasket in design, and the hole diameter of an inner hole of the gasket cannot be too large or too small due to the limitation of the hole diameter. After the gasket penetrates into the bolt, the gap between the gasket and the rod part of the bolt is small, when shot blasting is conducted before zinc-aluminum coating, shot blasting particles can be clamped between an inner hole of the gasket and the rod part of the bolt, on one hand, the gasket cannot rotate freely, final assembly performance is influenced, on the other hand, the shot blasting particles are brought into a coating solution, a large number of shot blasting particles are caused in the solution, the shot blasting particles are adhered to the inner sides of the bolt and the nut after zinc-aluminum coating, the assembly performance is influenced, and even thread sliding and fracture faults are caused.

Thus, the prior art fastener metal flat gasket also has a place to lift.

Disclosure of Invention

Aiming at the defects, the invention aims to provide the gasket which is efficient and simple in structure and does not influence the assembling performance of the gasket and the influence of zinc-aluminum coating shot blasting so as to solve the technical problems in the prior art.

In order to realize the purpose, the invention adopts the following technical scheme:

the utility model provides an efficient fastener metal flat gasket, the gasket is a flat cavity lamellar body, the outer edge of gasket is convex, the interior edge of gasket is the flower profile of tooth, interior edge comprises a plurality of arc, a plurality of arc includes the first arc of a plurality of and a plurality of second arc, first curved diameter is less than the curved diameter of second.

The gasket of the preferred embodiment of the present application, the first arcs of the plurality of are symmetrically formed, and the second arcs of the plurality of are symmetrically formed.

In the gasket according to the preferred embodiment of the present application, the number of the first arcs is 4, the number of the second arcs is 4, and the first arcs and the second arcs are sequentially connected to each other.

In the gasket of the preferred embodiment of the present application, the diameter of the second arc is equal to the diameter of the first arc plus 0.28 to 0.32.

The design theory of this application is, designs one kind and can solve the little problem in gasket and bolt rod portion fit clearance, and the function that the small circle aperture was used for remaining gasket and bolt combination not drop, and big diameter is used for increasing gasket and bolt combination back clearance, and the influence of shot when avoiding throwing the ball makes the zinc-aluminum coating can not block when throwing the ball and throws the ball granule, solves the unable free rotation's of gasket problem that the ball caused. In addition, can be according to actual assembly structure needs, select for use gasket complex structure in a flexible way, improve enterprise market competition.

Compared with the prior art, the invention has the following advantages and positive effects due to the adoption of the technical characteristics:

the gasket solves the problem that the fit clearance between the gasket and the bolt rod part is small, shot blasting particles cannot be clamped when zinc-aluminum coating shot blasting is carried out, and the problem that the gasket cannot freely rotate due to shot blasting is solved;

second, this application gasket provides a neotype gasket cooperation structure, can select for use in a flexible way according to actual assembly structure needs during the design.

Of course, it is not necessary for any particular embodiment of the inventive concept to be implemented to achieve all of the above technical effects at the same time.

Drawings

FIG. 1 is a cut-away schematic view of a gasket according to the present application;

FIG. 2 is a schematic view of a gasket according to the present application;

fig. 3 is an enlarged schematic view of the inner edge structure of the gasket of the present application.

Detailed Description

Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to only these embodiments. The invention is intended to cover alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the invention. In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components, and so forth have not been described in detail so as not to unnecessarily obscure aspects of the present invention.

Referring to fig. 1 and 2, the high-efficiency metal flat gasket for a fastener of the present application is a flat hollow sheet, as shown in fig. 1, and has a thickness H; as shown in fig. 2, an outer edge 10 of the gasket is in the shape of a circular arc, a diameter of the gasket is D3, an inner edge 20 of the gasket is in the shape of a flower tooth, the inner edge 20 is formed by a plurality of arcs, referring to fig. 3, the plurality of arcs include a plurality of first arcs 21 and a plurality of second arcs 22, and the diameter of the first arcs 21 is smaller than the diameter of the second arcs 22. That is, the plurality of first arcs 21 may be connected as a circle having a diameter D1, and the plurality of second arcs 22 may be connected as a circle having a diameter D2, where D1 is smaller than D2.

In addition, as shown in fig. 3, the plurality of first arcs 21 are symmetrically formed, and the plurality of second arcs 22 are symmetrically formed. According to practical verification, it is preferable to divide the circle with the diameter D1 into eight equal parts (but not limited to eight equal parts, and can be divided into other equal parts), and the symmetrical arcs of the four equal parts are reserved, that is, the first arc 21; meanwhile, a circle having a diameter D2 is divided into eight equal parts, and four equal circular arcs corresponding to the first arc 21, that is, the second arc 22, are reserved.

In summary, referring to fig. 3, the number of the first arcs 21 is 4, the number of the second arcs 22 is 4, and the first arcs 21 and the second arcs 22 are sequentially and alternately connected. R is the transition connecting line between the first arc 21 and the second arc 22, and the transition connecting line is verified to be the best transition between the arcs (but not used to limit the application, and a straight line connection is also possible), so that the service life of the mold can be improved. In the figure, L is the arc length of the first arc 21, and the included angle of 90 degrees is the included angle between the centers of the two second arcs 22 and the line connecting the centers of the circles.

Furthermore, the diameter of the second arc 22 is equal to the diameter of the first arc 21 plus 0.28 to 0.32. Expressed as a mathematical expression, D2= D1+ K, K ranging from =0.28 to 0.32.

The gasket of the present application is a use-type and novel gasket structure, and for M5-M10 gaskets, the dimensions D1 and D2, the arc length L, the angle ref, and the transition connection line R are the preferred dimensions of empirical values, please refer to table 1.

TABLE 1 preferred dimensions (commonly used M5-M10 gaskets)

In summary, due to the adoption of the technical characteristics, compared with the prior art, the invention has the following advantages and positive effects:

The preferred embodiments of the invention are provided solely to aid in the illustration of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents. The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and it is intended that all equivalent variations and modifications of the present invention as those skilled in the art can be made without departing from the spirit and scope of the present invention.

Claims

1. An efficient fastener metal flat gasket is characterized in that the gasket is used for forming a gasket combination bolt on a bolt subjected to zinc-aluminum coating surface treatment, the gasket is a flat hollow sheet body, the outer edge of the gasket is in an arc shape, the inner edge of the gasket is in a flower tooth shape, the inner edge of the gasket is composed of a plurality of arcs, the plurality of arcs comprise a plurality of first arcs and a plurality of second arcs, the plurality of first arcs are equal parts of a circle, the plurality of second arcs are equal parts of a circle, and the diameter of each first arc is smaller than that of each second arc; the first arc and the second arc are sequentially and interactively connected, and a transition connecting line is arranged between the first arc and the second arc.

2. The gasket as set forth in claim 1 wherein said plurality of first arcs are symmetrically organized and said plurality of second arcs are symmetrically organized.

3. The gasket of claim 1 wherein the number of first arcs is 4 and the number of second arcs is 4.