CN108591226A - A kind of new mechanical lock curable type nut connection anti-loose structure - Google Patents

Abstract

The invention discloses a new mechanical locking type nut connection anti-loosening structure, and the mechanical locking type nut connection anti-loosening structure includes a nut, a screw rod and a small screw. The center of the nut has a threaded hole, and there is an internal thread in the threaded hole. The outside of the threaded hole of the nut has an annular nut body, and several through holes are distributed along the ring on the nut body. The screw has a screw body and a screw cap. , the main body of the screw rod is columnar and has external threads on the outside. In the present invention, a plurality of axial light holes are opened on the nut, and a small threaded hole is opened on the shaft shoulder end surface of the screw rod, and a small screw with a spring is installed. When anti-loosening is required after tightening the nut, the front thin cylinder (less than the diameter of the nut light hole) of the small screw is screwed out from the light hole of the nut to prevent the nut from rotating relative to the screw rod to achieve the anti-loosening effect.

Description

A New Mechanically Locked Nut Connection Anti-loosening Structure

technical field

The invention relates to the mechanical field, in particular to a mechanically locked nut anti-loosening structure used in a mechanical structure, especially in a vibration environment.

Background technique

The existing anti-loosening methods of nuts mainly include: mechanical locking type anti-loosening (reliable anti-loosening, which can be repeatedly disassembled), free rotation type anti-loosening (unreliable anti-loosening, which can be repeatedly disassembled), bonding type anti-loosening (anti-loosening Slightly reliable, can be repeatedly disassembled), punch point riveting type anti-loosening (reliable anti-loosening, can not be repeatedly disassembled) and effective torque type anti-loosening (unreliable anti-loosening, can be repeatedly disassembled).

Among them, the anti-loosening structure of the mechanical locking nut is reliable in anti-loosening, and can be disassembled repeatedly, so it is widely used. The existing mechanical lock nut anti-loosening structure is:

1. Screw with hole and slotted nut with cotter pin

2. Ordinary screw and nut are equipped with cotter pins: after the nuts are tightened, holes are drilled on the screw and nuts, and the cotter pins are inserted to prevent the nut and the screw from rotating with each other.

3. Bolts with holes in the head go through metal steel wires: use low carbon steel wires to penetrate the small holes in the heads of the nuts in groups, and the nuts can be mutually restricted.

4. Anti-loosening of the stop washer: use single ear, double ear or outer tongue made of low carbon steel to fix the nut on the connected piece.

It can be seen from the above introduction that only mechanical locking anti-loosening methods can be used in occasions that require repeated disassembly and reliable anti-loosening, and various forms of mechanical locking anti-loosening methods require a large space around them. For those threaded connections that require reliable anti-loosening and repeated disassembly, but the surrounding space is small, relaxation treatment cannot be performed.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention proposes a relaxation structure that can be repeatedly disassembled and used in limited environmental space. The invention solves the problem of anti-loosening nuts of threaded connections that require reliable anti-loosening, repeated disassembly, and limited surrounding space.

A new mechanical locking nut connection anti-loosening structure is characterized in that the mechanical locking type nut connection anti-loosening structure includes nuts, screw rods and small screws.

Preferably, the center of the nut has a threaded hole, the threaded hole has an internal thread, the outside of the threaded hole of the nut has an annular nut body, a number of through holes are distributed along the ring on the nut body, and the screw has a screw body and a screw cap, the screw body is columnar and has external threads on the outside, the diameter of the screw cap is larger than the screw body, and the screw cap has several small threaded holes at the part outside the screw body, the One end of the small threaded hole is closed, and the other end is open. The middle and lower part of the small threaded hole has an internal thread. The number of small threaded holes is the same as the number of through holes on the nut body, and the positions correspond to each other. The first part of the small screw The outer side of the end has an external thread, the inner side of the first end has a columnar concave hole, the second end of the small screw is provided with an interface that matches the screwdriver, and the outer diameter of the second end of the small screw is smaller than the through hole of the nut body. Hole diameter, the outer diameter of the first end of the small screw is greater than the through hole diameter of the nut body, each of the small screws is screwed in a small threaded hole, before the small screw is installed, set in the small threaded hole A small spring, one end of the small spring is pressed against the bottom of the small threaded hole, and the other end is pressed against the end wall of the concave hole of the small screw. Before the screw is installed, the small screw is completely screwed into the small screw. In the threaded hole, so that the small screw rod is completely submerged in the plane of the screw cap of the screw rod, when the mechanical lock nut is connected to the anti-loosening structure, install the nut to the screw rod, tighten and Ensure that each of the through holes of the nut is aligned with one of the small threaded holes on the screw rod. Since the outer diameter of the second end of the small screw is smaller than the diameter of the through hole of the nut, a screwdriver can be inserted into each of the small threaded holes. the through hole of the nut, unscrew the second end of the small screw from the through hole of the nut, because the outer diameter of the first end of the small screw is larger than the through hole of the nut, so in the small screw After the second end of the screw fully enters the nut through hole, the first end of the small screw will be blocked by the through hole of the nut, and the small screw keeps the small screw from retracting under the pressure of the small spring.

Preferably, the through holes are evenly distributed on the annular wall of the nut.

Preferably, one end of the spring is fixed in the concave hole of the small screw.

Preferably, the number of said through holes is an even number.

In the present invention, a plurality of axial light holes are opened on the nut, and a small threaded hole is opened on the shaft shoulder end surface of the screw rod, and a small screw with a spring is installed. When anti-loosening is required after tightening the nut, the front thin cylinder (less than the diameter of the nut light hole) of the small screw is screwed out from the light hole of the nut to prevent the nut from rotating relative to the screw rod to achieve the anti-loosening effect. Due to the thrust of the spring, the small screw will not retreat into the threaded hole by itself due to vibration when the screwdriver is not used to screw it in. Because the external thread at the rear part of the small screw is smaller than the diameter of the through hole of the nut, the small screw will not escape outwards from the light hole of the nut. Therefore, the small screw is always in the anti-loosening position, and the nut will not rotate relative to the screw rod.

The invention can realize the reliable anti-loosening of nuts that need to be disassembled repeatedly and have limited surrounding space,

The anti-loosening structure is mainly inside the nut and the screw, and does not take up extra space.

Description of drawings

Fig. 1 is a nut structural representation of the present invention;

Fig. 2 is the structural representation of screw rod of the present invention;

Fig. 3 is the schematic diagram of the small screw that is loaded into the small threaded hole of the screw rod;

Fig. 4 is the screw rod that has installed small spring, small screw.

Figures 5-6 are schematic diagrams of the installation process.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and the embodiments thereof, but the protection scope of the present invention is not limited to the scope described in the embodiments.

Referring to Figures 1-6, the nut structure in this embodiment includes three parts: a nut, a screw rod and a small screw.

Structure and composition

1.1 Nut

Fig. 1 is a schematic diagram of the nut structure of the present invention, and a certain number of evenly distributed through holes are drilled at corresponding positions on the nut. The left side of the figure is the front view of the nut, and the right side is the left side view. As can be seen from the front view in the figure, the center of the nut has a threaded hole, and there is an internal thread 2 in the threaded hole. The outside of the threaded hole of the nut has an annular nut body, and several through holes 1 are distributed along the ring on the nut body. .

1.2 screw

Figure 2 shows the structure of the screw, wherein the left side is the side view of the screw, and the right side is the front view of the screw. Described screw rod has screw rod main body (the right side of left figure in Fig. 2) and screw cap (left side in Fig. 2 left figure), and described screw rod body is columnar, and external thread 3 is arranged on the outside, and the diameter of described screw rod cap is larger than The screw body and the screw cap have several small threaded holes 4 at the part outside the screw body. One end of the small threaded holes 4 is closed and the other end is open. The middle and lower parts of the small threaded holes have internal threads . Each small screw hole 4 is used to pack a small screw.

The number of small threaded holes is the same as the number of through holes on the nut body, and the positions correspond to each other.

As shown in FIG. 3 , the left side of FIG. 3 shows a cross-sectional view of the small screw, and the right side shows a view from the bottom of the left figure. The outside of the first end of the small screw (the upper end of the left figure in Figure 3) has an external thread, and the inner side of the first end has a columnar concave hole 5, and the second end of the small screw (the lower end of the left figure in Figure 3) is provided with An interface matched with a screwdriver, the outer diameter of the second end of the small screw is smaller than the diameter of the through hole of the nut body, the outer diameter of the first end of the small screw is larger than the diameter of the through hole of the nut body, each of the small screws The screw is screwed in a small threaded hole. Before the small screw 8 is installed, a small spring 7 (or a small spring is fixedly installed in the concave hole of the small screw) is set in the small threaded hole, and one end of the small spring is pressed against the The bottom of the small screw hole, and the other end is against the end wall of the concave hole of the small screw.

As shown in Figure 4, before the screw is installed, the small screw is fully screwed into the small threaded hole, so that the small screw is completely submerged in the plane of the screw cap of the screw, when the mechanical locking type When installing the nut connection anti-loosening structure, install the nut to the screw, tighten and ensure that each of the through holes of the nut is aligned with one of the small threaded holes on the screw, as shown in Figure 5 . Fig. 5 is a partially enlarged view of a position of a through hole after the screw rod and the nut are installed.

Since the outer diameter of the second end of the small screw is smaller than the diameter of the through hole of the nut, a screwdriver can be used to insert the through hole of the nut to unscrew the second end of the small screw from the through hole of the nut. Because the outer diameter of the first end of the small screw is larger than the through hole of the nut, after the second end of the small screw enters the through hole of the nut completely, the first end of the small screw will be blocked by the through hole of the nut. Blocking, the small screw keeps the small screw from retracting under the pressure of the small spring.

Fig. 4 is the screw rod that has installed small spring, small screw.

2. The use process of the product of the present invention

Install the nut on the screw rod and tighten it to ensure that each through hole of the nut is aligned with a threaded hole on the screw rod. As shown in Figure 5.

Because the diameter of the thin cylinder at the front part of the small screw is smaller than the through hole diameter of the nut, a screwdriver can be used to stretch into the through hole of the nut, and the thin cylinder at the front part of the small screw can be screwed out from the through hole of the nut. Because the outer diameter of the rear thread of the small screw is larger than the through hole of the nut, after the thin cylinder at the front of the small screw enters the nut through hole, the rear thread of the small screw will be blocked by the through hole of the nut, and the screwdriver will not be able to turn it. Moved. As shown in Figure 6:

In this way, the nut is blocked by the thin cylinder of the small screw and cannot rotate relative to the screw rod, thereby realizing the anti-loosening of the nut. The rear part of the small screw is supported by the compressed spring, and will not move into the threaded hole due to vibration, because the rear thread is blocked by the nut through hole, and cannot move outward, and the small screw is also prevented from loosening.

Although the principle of the present invention has been described in detail above in conjunction with the preferred embodiments of the present invention, those skilled in the art should understand that the above embodiments are only explanations for the exemplary implementation of the present invention, and are not intended to limit the scope of the present invention. The details in the embodiments do not constitute a limitation to the scope of the present invention. Without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformations and simple replacements based on the technical solutions of the present invention fall within the scope of the present invention. within the scope of protection.

Claims (5)

1. A new mechanical locking type nut connection anti-loosening structure, characterized in that, the mechanical locking type nut connection anti-loosening structure includes a nut, a screw rod and a small screw. 2. The new mechanical locking type nut connection anti-loosening structure according to claim 1, characterized in that, the center of the nut has a threaded hole, the threaded hole has internal threads, and the outer side of the threaded hole of the nut There is a ring-shaped nut body, several through holes are distributed along the ring on the nut body, the screw has a screw body and a screw cap, the screw body is columnar, and the outside has external threads, and the diameter of the screw cap is larger than the screw body, The screw cap has several small threaded holes at the part outside the screw body, one end of the small threaded holes is closed, and the other end is open. The middle and lower parts of the small threaded holes have internal threads. The number of through holes on the nut body is the same, and the positions correspond to each other. The outside of the first end of the small screw has an external thread, and the inside of the first end has a columnar concave hole. The second end of the small screw is provided with An interface matched with a screwdriver, the outer diameter of the second end of the small screw is smaller than the diameter of the through hole of the nut body, the outer diameter of the first end of the small screw is larger than the diameter of the through hole of the nut body, each of the small screws The screw is screwed in a small threaded hole. Before the small screw is installed, a small spring is arranged in the small threaded hole. One end of the small spring is pressed against the bottom of the small threaded hole, and the other end is pressed against the small screw. On the end wall of the recessed hole, before the screw is installed, the small screw is completely screwed into the small threaded hole, so that the small screw is completely submerged in the plane of the screw cap of the screw, when the mechanical lock When the solid nut is connected to the anti-loosening structure, install the nut to the screw, tighten it and ensure that each of the through holes of the nut is aligned with one of the small threaded holes on the screw, because the The outer diameter of the second end of the small screw is smaller than the diameter of the through hole of the nut, therefore, a screwdriver can be used to penetrate into the through hole of the nut, and the second end of the small screw can be screwed out from the through hole of the nut. The outer diameter of the first end of the small screw is greater than the through hole of the nut, and after the second end of the small screw enters the through hole of the nut, the first end of the small screw will be blocked by the through hole of the nut, and the second end of the small screw will be blocked by the through hole of the nut. The small screw keeps the small screw from retracting under the pressure of the small spring. 3. The new mechanical locking nut connection anti-loosening structure according to claim 2, characterized in that, the through holes are evenly distributed on the annular wall of the nut. 4. The novel mechanical locking nut connection anti-loosening structure according to claim 2, wherein one end of the spring is fixed in the concave hole of the small screw. 5. The new mechanical locking nut connection anti-loosening structure according to claim 2, characterized in that the number of said through holes is an even number.