CN116816790A - Interference fit fastener and method for dismounting same on component - Google Patents

Abstract

The application belongs to the technical field of fastener design, and particularly relates to an interference fit fastener and a disassembling and assembling method thereof on a component, wherein the interference fit fastener comprises the following components: the side wall of the bushing is provided with an axial slit, and one end of the bushing is outwards expanded to form a horn mouth; the screw rod of the bolt can penetrate through the bushing, the middle part of the screw rod is a polished rod part, and the outer wall of the polished rod part can be in fit contact with the conical surface between the inner walls of the bushing; the head of the bolt is conical and can be immersed into the bell mouth; the nut is screwed on the top end of the bolt; the end face of the open end of the sleeve can be abutted against the end face of the bell mouth.

Description

An interference fit fastener and its disassembly and assembly method on components

Technical field

The present application belongs to the technical field of fastener design, and specifically relates to an interference fit fastener and its disassembly and assembly method on components.

Background technique

In engineering, it is usually necessary to install fasteners on components. Currently, bolts are often directly assembled into holes on components and tightened with nuts. When the diameter of the holes on the component does not match the size of the bolt shank, When matching, it is difficult to disassemble and assemble, and it is easy to scratch the hole wall and cause structural damage to the components.

This application is filed in view of the existence of the above technical defects.

It should be noted that the disclosure of the above background technology content is only used to assist in understanding the inventive concepts and technical solutions of this application. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content is not relevant in this application, If the application date has been published, the above background technology should not be used to evaluate the novelty and inventiveness of the application.

Contents of the invention

The purpose of this application is to provide an interference fit fastener and a method for disassembling and assembling the component, so as to overcome or alleviate at least one of the known technical deficiencies.

The technical solution of this application is:

On the one hand, an interference fit fastener is provided, including:

The bushing has an axial slit on its side wall and one end is expanded to form a bell mouth;

The screw of the bolt can be set through the bushing, and the middle part of the screw is the polished rod part. The outer wall of the polished rod part can be in contact with the tapered surface of the inner wall of the bushing; the head of the bolt is tapered and can be submerged into the bell mouth;

Nut, screwed to the top of the bolt screw;

The end face of the open end of the sleeve can abut against the end face of the bell mouth.

According to at least one embodiment of the present application, in the above-mentioned interference fit fastener, the end surface of the bolt head has a knob groove.

On the other hand, a method for disassembling and assembling interference fit fasteners on components is provided, including:

When assembling on a component:

Place the bushing into the hole in the component;

Set the bolt through the bushing;

Screw the nut on the top of the bolt and screw, tighten the nut, and pull the bolt so that the outer wall of the polished rod on the bolt is in contact with the inner wall of the bushing, thereby causing the bushing to expand and tighten in the hole of the component;

When disassembling components:

Unscrew the nut;

The end surface of the open end of the sleeve is pressed against the bell mouth end surface of the bushing;

Apply thrust to the top of the bolt screw to cause the bolt to come out of the bushing, and then the bushing will shrink inward under its own elastic force and loosen in the hole of the component, so that it can be taken out from the hole of the component.

This application has at least the following beneficial technical effects:

An interference fit fastener and a method for disassembling and assembling the interference fit fastener on the component are provided. During the entire disassembly and assembly process, the interference fit fastener is directly in contact with the upper hole wall of the component and has a smaller outer diameter. The sleeve will not slip, which can reduce the friction with the hole wall and avoid damage to the hole wall on the component. In addition, the sleeve is designed to be disassembled, which is safe, efficient and convenient.

Description of the drawings

Figure 1 is a schematic diagram of an interference fit fastener provided by an embodiment of the present application;

Figure 2 is a schematic diagram of the cooperation between the bushing and the bolt provided by the embodiment of the present application;

Figure 3 is a schematic diagram of a bolt provided by an embodiment of the present application;

Figure 4 is a schematic diagram of the interference fit fastener provided by the embodiment of the present application being assembled on a component;

Figure 5 is a schematic diagram of the interference fit fastener provided by the embodiment of the present application being disassembled on the component;

in:

1- Bushing; 2- Bolt; 3- Nut; 4- Sleeve; 5 parts.

In order to better illustrate this embodiment, some components in the drawings may be omitted, enlarged or reduced, which does not represent the size of the actual product; in addition, the drawings are only for illustrative purposes and shall not be construed as limitations of this patent.

Detailed ways

In order to make the technical solution of the present application and its advantages more clear, the technical solution of the present application will be described in further clear and complete detail below in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only part of the present application. The examples are only used to explain the present application, but not to limit the present application. It should be noted that, in order to facilitate description, only the parts related to the present application are shown in the drawings. Other relevant parts may refer to the general design. In the case of no conflict, the embodiments in the present application and the technology in the embodiments Features can be combined with each other to obtain new embodiments.

In addition, unless otherwise defined, technical terms or scientific terms used in the description of this application shall have the usual meanings understood by those of ordinary skill in the art to which this application belongs. The words "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inside", "outside" and other words used in the description of this application are only used To express a relative direction or positional relationship, it does not imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. , therefore cannot be understood as a limitation on this application. The "first", "second", "third" and similar terms used in the description of this application are only used for descriptive purposes to distinguish different components, and cannot be understood as indicating or implying relative importance. The words "a", "an" or "the" and other similar words used in the description of this application should not be understood as an absolute limitation on the number, but should be understood as indicating the presence of at least one. The use of similar words such as "comprises" or "includes" in the description of this application means that the elements or things appearing before the word include the elements or things listed after the word and their equivalents, without excluding other elements or things.

In addition, it should be noted that, unless otherwise expressly stipulated and limited, similar words such as "installation", "connection", and "connection" used in the description of this application should be understood in a broad sense. For example, the connection may be fixed. The connection can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, or it can be an internal connection between two components. Within the field Skilled persons can understand its specific meaning in this application according to specific circumstances.

The present application will be further described in detail below with reference to Figures 1 to 5.

On the one hand, an interference fit fastener is provided, as shown in Figure 1, including:

Bushing 1 has an axial slit on its side wall, and one end is expanded outward to form a bell mouth;

The bolt 2 has a screw that can penetrate the bushing 1, and the middle part of the screw is a polished rod part, and the outer wall of the polished rod part can be in contact with the cone surface between the inner walls of the bushing 1; the head of the bolt 2 is tapered and can be submerged into the bell mouth;

Nut 3 is screwed to the top of the screw of bolt 2;

The end surface of the open end of the sleeve 4 can abut against the end surface of the bell mouth.

In some optional embodiments, in the above-mentioned interference fit fastener, the end surface of the head of the bolt 2 has a knob groove, which may be a plum blossom stake, to facilitate tightening or positioning with a tool.

In some optional embodiments, the above interference fit fastener also includes:

On the other hand, a method for disassembling and assembling interference fit fasteners on components is provided, including:

When assembling on the component, as shown in Figure 4:

Put the bushing 1 into the hole of the component 5. The shape of the hole on the component 5 matches the shape of the bushing 1. The hole diameter can be slightly larger than the outer diameter of the bushing 1 in its natural state, so that the bushing 1 can be easily put into the hole. In the hole of the component 5, avoid damage to the hole wall of the component 5. The component 5 can be a plate-shaped component made of composite material or metal material;

Set the bolt 2 through the bushing 1;

Screw nut 3 on the top of the screw of bolt 2, and tighten nut 3 to pull bolt 2, so that the outer wall of the polished rod on the screw of bolt 2 contacts the inner wall of bushing 1, thereby causing bushing 1 to expand and expand. Tightly in the hole of component 5, interference assembly on component 5 is achieved. During this process, bushing 1, which is in direct contact with the hole wall of component 5, does not need to slide, thereby reducing friction with the hole wall. Avoid damage to the hole wall of component 5;

When disassembling the components, as shown in Figure 5:

Unscrew nut 3;

The end face of the open end of the sleeve 4 is pressed against the bell mouth end face of the bushing 1;

Apply thrust to the top of the screw of bolt 2 to make bolt 2 come out of bushing 1. The blocked end of sleeve 4 can restrict bolt 2 from falling off directly to prevent bolt 2 from scratching the surface of component 5. In the process, due to the sleeve 4 The end face of the open end abuts the bell mouth end face of bushing 1 to ensure that bushing 1 does not slide and avoid damage to the upper hole wall of component 5;

After the bolt 2 comes out of the bushing 1, the bushing 1 shrinks inward under its own elastic force and becomes loose in the hole of the component 5, so that it can be easily taken out from the hole of the component 5 without damaging the hole wall of the component 5. cause damage.

The method for disassembling and assembling the interference fit fastener on the component disclosed in the above embodiment is used to realize the disassembly and assembly of the interference fit fastener on the component 5. The entire disassembly and assembly process directly contacts the upper hole wall of the component 5, and the outer surface The bushing 1 with a smaller diameter will not slide, which can reduce the friction with the hole wall and avoid damage to the hole wall on the component 5. In addition, the sleeve 4 is designed to be disassembled, which is safe, efficient and convenient.

Each embodiment in the specification is described in a progressive manner. Each embodiment focuses on its differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other.

So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the drawings. Those skilled in the art should understand that the protection scope of the present application is obviously not limited to these specific embodiments, without departing from the principles of the present application. Under the premise, those skilled in the art can make equivalent changes or replacements to the relevant technical features, and the technical solutions after these changes or replacements will fall within the protection scope of this application.

Claims (3)

1. An interference fit fastener, comprising:

the side wall of the bushing (1) is provided with an axial slit, and one end of the bushing is outwards expanded to form a bell mouth;

the bolt (2) can penetrate through the bushing (1), the middle part of the bolt is a polished rod part, and the outer wall of the polished rod part can be in conical surface fit contact with the inner wall of the bushing (1); the head of the bolt (2) is conical and can be immersed into the bell mouth;

the nut (3) is screwed at the top end of the screw rod of the bolt (2);

and a sleeve (4) the end face of the open end of which can be abutted against the bell end face.

2. The interference fit fastener of claim 1 wherein,

the end face of the head of the bolt (2) is provided with a knob groove.

3. A method of removing an interference fit fastener from a component, comprising:

when assembling on the component:

placing the bushing (1) into the hole of the component (5);

the bolt (2) penetrates through the bushing (1);

a nut (3) is screwed on the top end of a screw rod of the bolt (2), the nut (3) is screwed, so that the bolt (2) is pulled, the outer wall of a polished rod part on the screw rod of the bolt (2) is contacted with the inner wall of the bushing (1) in a conical surface fit manner, and the bushing (1) is expanded and is tightly expanded in a hole of the component (5);

when the component is disassembled:

unscrewing the nut (3);

the end face of the open end of the sleeve (4) is abutted against the bell mouth end face of the bushing (1);

the thrust is applied to the top end of the screw rod of the bolt (2), so that the bolt (2) is separated from the bushing (1), the bushing (1) is further contracted inwards under the action of self elastic force, and the bushing is loosened in the hole of the component (5), so that the bushing can be taken out from the hole of the component (5).