CN205401394U - Thread connection with locking function - Google Patents

Abstract

The utility model discloses a screw connection with anti-loosening function, which mainly includes bolts, steel balls and set screws. The bolt is a hollow structure with threaded holes and taper holes inside. The bolt head has radial gaps. Steel balls are installed inside the bolts. Set screws are installed inside the bolts and are in contact with the steel balls. The utility model has the characteristics of simple structure, reliable anti-loosening, and does not reduce the anti-loosening performance after repeated disassembly, and is suitable for various mechanical equipments.

Description

A screw connection with anti-loosening function

technical field

The utility model relates to a threaded connection, in particular to a threaded connection with an anti-loosening function.

Background technique

In the mechanical field, in order to facilitate the manufacture, installation, transportation, maintenance of machines and improve labor productivity, people widely use various threaded connection structures, such as common bolts, nuts and other joints are typical threaded connection structures.

Threaded connections can generally meet the self-locking conditions, and after the thread is tightened, the friction between the bolt and the nut, and between the bolt and the supporting surface of the fastener will also prevent the bolt from loosening by itself. However, in the case of shock, vibration, temperature change or load change, the friction between the screw pairs may decrease or disappear instantly. After this phenomenon is repeated many times, the bolts will loosen naturally, and finally lead to failure of threaded connections. Once the threaded connection fails, the light one will affect the normal operation of the machine, and the serious one will cause serious safety accidents.

The fundamental problem of thread anti-loosening is to prevent the relative movement of the screw pair. Therefore, in order to prevent the threaded connection from getting loose and ensure that the connection is safe and reliable, people have also accumulated a large amount of experience and found a lot of anti-loosening methods. Common anti-loosening methods include spring washers, self-locking nuts, counter nuts, cotter pins, stop washers, or forced anti-loosening measures such as bonding and riveting.

Utility model content

The purpose of the utility model is to provide a threaded connection with anti-loosening function.

In order to achieve the above purpose, the technical solution of the present invention is: a threaded connection with anti-loosening function, mainly including bolts, steel balls, and set screws. The bolt is a hollow structure with threaded holes and taper holes inside. The bolt head has radial gaps. Steel balls are installed inside the bolts. Set screws are installed inside the bolts and are in contact with the steel balls.

Before use, the steel ball is placed in the taper hole inside the bolt, and the set screw is installed in the threaded hole inside the bolt without extrusion force between the steel ball and the bolt.

When two mechanical parts need to be fastened, firstly, the two mechanical parts are fastened according to the use method of traditional bolts, and then the set screws are tightened.

In the process of tightening the set screw, the set screw pushes the steel ball to move forward in the taper hole of the bolt, and squeezes the taper hole through the steel ball. Since the bolt head has a radial gap, the bolt head will actually be slightly outward Expansion, thereby increasing the pressure between the bolt head and the connected parts, and finally make the screw threads be pressed against each other to achieve the purpose of preventing loosening.

The utility model has the characteristics of simple structure, reliable anti-loosening, and does not reduce the anti-loosening performance after repeated disassembly, and is suitable for various mechanical equipments.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a sectional view of a threaded connection with anti-loosening function of the present invention.

Fig. 2 is a cross-sectional view of a threaded connection bolt with anti-loosening function of the utility model.

Fig. 3 is a schematic diagram of the working state of a threaded connection with anti-loosening function of the present invention.

detailed description

The details and working conditions of the specific equipment proposed according to the utility model will be described in detail below in conjunction with the accompanying drawings.

A threaded connection with an anti-loosening function mainly includes a bolt 1, a steel ball 3, and a set screw 2. Bolt 1 is a hollow structure with threaded holes and tapered holes inside. The head of bolt 1 has a radial gap. Steel ball 3 is installed inside bolt 1. Set screw 2 is installed inside bolt 1 and contacts with steel ball 3.

Before use, the steel ball 3 is put into the tapered hole inside the bolt 1, and the set screw 2 is installed at the threaded hole inside the bolt 1, and there is no extrusion force between the steel ball 3 and the steel ball 3.

When the two mechanical parts 4 and 5 need to be fastened, firstly, the two mechanical parts 4 and 5 are fastened according to the traditional bolt usage method, and then the set screw 2 is tightened.

In the process of tightening the set screw 2, the set screw 2 pushes the steel ball 3 to move forward in the taper hole of the bolt 1, and squeezes the taper hole through the steel ball 3. Since the head of the bolt 1 has a radial gap, the head of the bolt 1 In fact, the part will expand slightly outward, thereby increasing the pressure between the head of the bolt 1 and the connected part 5, and finally make the screw threads be pressed against each other to achieve the purpose of preventing loosening.

Claims (2)

1. A threaded connection with anti-loosening function, mainly including bolt (1), steel ball (3), set screw (2), characterized in that: bolt (1) is a hollow structure with threaded holes and tapered holes inside , the head of the bolt (1) has a radial gap, the steel ball (3) is installed inside the bolt (1), and the set screw (2) is installed inside the bolt (1) and contacts with the steel ball (3). 2. A threaded connection with anti-loosening function according to claim 1, characterized in that: when the set screw (2) pushes the steel ball (3) to move forward, the head of the bolt (1) will move outward swell.