CN212155391U

CN212155391U - Magnetic ring for preventing looseness of threaded fastener

Info

Publication number: CN212155391U
Application number: CN202020245945.0U
Authority: CN
Inventors: 郑欣欣; 宋川; 洪翔; 周勇祥; 严天强
Original assignee: China Railway Longchang Materials Co Ltd
Current assignee: China Railway Longchang Materials Co Ltd
Priority date: 2020-03-03
Filing date: 2020-03-03
Publication date: 2020-12-15
Anticipated expiration: 2030-03-03

Abstract

The utility model discloses a magnetic ring for preventing looseness of a threaded fastener, which is sheet-shaped, two end faces of the magnetic ring are respectively provided with wedge-shaped teeth with different sizes, wherein one end of each small tooth forms a small tooth surface, and one end of each large tooth forms a large tooth surface; the included angle between the magnetic pole direction of the magnetic ring and the geometric axial direction of the magnetic ring is less than or equal to 5 degrees. Compared with the prior art, the utility model has the positive effects that: the utility model discloses can with threaded fastener, connecting piece, fixed by the connecting piece, make screw thread (bolt, screw, nut etc.) fastener also not hard up under abominable operating mode to improve threaded fastener's connection reliability greatly. The utility model discloses can make threaded connection fastener possess higher fastening performance, locking stability, simple and convenient, high-efficient, good reliability.

Description

Magnetic ring for preventing looseness of threaded fastener

Technical Field

The utility model relates to a be used for locking magnetic ring of threaded fastener.

Background

The threaded fastener is almost used on all mechanical devices and equipment, is the most important component for ensuring the connection reliability of a mechanical system, is widely used and detachable and fixedly connected, has the advantages of simple structure, convenience in assembly and disassembly and the like, but has the problems of looseness and looseness of the threaded fastener just because of the reversible assembly and disassembly of the threaded connection. With the continuous development of national economy and the continuous progress of science and technology, the number of fasteners applied to devices and equipment is increased, the safety and reliability of thread fastening are ensured, and the requirements on vibration resistance, impact resistance and fatigue failure resistance of the connecting fasteners are extremely high especially under the conditions of complex working environment and severe working conditions. The existing thread anti-loosening technology can not meet the requirements of connection and assembly of large devices and large equipment, and the invention provides a brand-new thread fastening anti-loosening element which is necessary for improving the connection reliability of a fastener to the greatest extent.

Disclosure of Invention

In order to overcome the above-mentioned shortcoming of prior art, the utility model provides a magnetic ring for threaded fastener is locking aims at improving threaded fastener's locking nature and connection reliability.

The utility model provides a technical scheme that its technical problem adopted is: a magnetic ring for preventing a threaded fastener from loosening is sheet-shaped, wedge-shaped teeth with different sizes are arranged on two end faces of the magnetic ring, wherein one end of each small tooth forms a small tooth surface, and one end of each large tooth forms a large tooth surface; the included angle between the magnetic pole direction of the magnetic ring and the geometric axial direction of the magnetic ring is less than or equal to 5 degrees.

Compared with the prior art, the utility model has the positive effects that:

the utility model provides a magnetic ring for preventing the loosening of a threaded fastener, which is combined into a part usually comprising even numbers (two, four or more even numbers) and mutually matched for use; the magnetic ring combination matched with each other utilizes the self structure and magnetism to enable the magnetic ring combination to be meshed and closely attached; the utility model discloses can with threaded fastener, connecting piece, fixed by the connecting piece, make screw thread (bolt, screw, nut etc.) fastener also not hard up under abominable operating mode to improve threaded fastener's connection reliability greatly. The utility model discloses can make threaded connection fastener possess higher fastening performance, locking stability, simple and convenient, high-efficient, good reliability.

The utility model discloses a be used for locking magnetic ring of threaded fastener and combined use, the design is unique, novel in design, the utility model discloses possess the characteristics of high performance, high reliability, this magnetic ring and combination are applicable to the abominable mechanical device of operating mode such as vibration, impact, alternating load, equipment connection and use, but not limited to mechanical industry, are applicable to a plurality of trades such as building, electric power, railway, highway, aviation, military project equally. The whole technical scheme has simple and reliable process and high safety guarantee, and has important significance for improving the comprehensive performance of connection and fastening of the conventional devices and equipment.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

fig. 1 is a front view of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a bottom view of fig. 1.

Fig. 4 is a front view of the combination of the present invention.

Fig. 5 is an exploded isometric view of fig. 4.

Fig. 6 is a schematic view of the magnetic pole of fig. 4.

Fig. 7 is an enlarged view of a portion of the structure of fig. 6.

Fig. 8 is an application example of the combination of the present invention.

Fig. 9 is an example of the use of the combination of the present invention.

Detailed Description

A magnetic ring for preventing the loosening of screw fastener is made of steel or stainless steel, the steel is the spring steel with the trademark of 27MnCrB5, the stainless steel is the austenitic stainless steel with the trademark of 022Cr17Ni12Mo2, but not limited to the above-mentioned materials, such as steel, stainless steel, alloy and other metal materials. The magnetic ring material contains one or more elements of iron, cobalt, nickel and the like which have a magnetism gathering function, the magnetic ring has the magnetic remanence of 0-10 kGs, the magnetic induction strength coercive force of 0-20 kOe and the magnetic energy product of 0-30 MGOe, and the application temperature is not higher than 200 ℃. The magnetic ring has the shape as shown in fig. 1, 2 and 3, is in a ring shape or a sheet shape, has an inner diameter D ranging from phi 3mm to phi 240mm, an outer diameter D ranging from phi 5mm to phi 600mm, and a thickness h ranging from phi 2mm to phi 25mm, and is suitable for the connection of metric threaded fasteners of M3 to M240. Fig. 2 shows the small tooth end of the magnetic ring, and fig. 3 shows the large tooth end of the magnetic ring.

The magnetic pole direction of the magnetic ring is inclined to the axial direction of the magnetic ring, as shown in fig. 1, 5 and 6. The magnetic ring is magnetized, the combination of two or more matched rings also has magnetism, and the magnetization direction is the axial direction of the magnetic ring, but is not absolutely parallel to the geometric axial direction of the ring, but forms an angle of not more than 5 degrees with the geometric axial direction of the ring.

The magnetic ring is usually composed of an even number (two, four or more even numbers) and a part, and is usually composed of two parts and a part which are buckled up and matched with each other, but the combination of a single part or a single part (three or more single parts) is not excluded. In the magnetic ring combination shown in fig. 4 and 5, the magnetic ring 1 and the magnetic ring 2 which are matched with each other have the same size and the same shape, and only have different magnetic pole directions; if N-level of one magnetic ring points to the small tooth end, and the N-level of the other magnetic ring points to the large tooth end, the two magnetic rings are buckled and matched to form a magnetic ring group by utilizing the principle that magnetic poles attract each other oppositely, and the wedge-shaped tooth structures arranged on the end surfaces of the two magnetic rings in the combination are beneficial to being simultaneously meshed and closely adhered under the action of magnetic force to form an integral component; as shown in fig. 6, the overall magnetic properties of the magnetic ring assembly are in a state of N-level at one end and S-level at the other end.

In the magnetic ring assembly shown in fig. 6 and 7, the large tooth surface 11 of the magnetic ring 1 and the large tooth surface 21 of the magnetic ring 2 are in mutual engagement and alignment, and are attached by magnetic attraction. The small tooth surface 12 of the magnetic ring 1 and the small tooth surface 22 of the magnetic ring 2 form two ends of a magnetic ring group, and respectively display magnetic N-level and magnetic S-level. And two sets of magnetic ring combinations can also be matched through magnetic superposition, so that four rings are formed as a combined component, and the like.

As an example of the looseness prevention of the threaded connection to which the magnetic ring group shown in fig. 8 is applied, the bolt 6 as a threaded fastener element mounts the attachment 4 to the attached member 5. Due to the reversible mounting and dismounting of the threaded connection, the bolt is easy to loosen, and particularly the bolt is in a dynamic environment. The bolt 6 and the connecting piece 4 can be attracted and tightly attached through the magnetic ring combination 3; meanwhile, the small tooth surface 12 at the upper end of the magnetic ring 3 can be wedged into the pressing surface of the bolt 6 in the pre-tightening process of the bolt 6, and the small tooth surface 22 at the lower end of the magnetic ring 3 can also be wedged into the pressed surface of the connecting piece 4 in the pre-tightening process of the bolt 6, so that double anti-loosening effects of magnetic attraction and wedging and stopping are formed in a connecting system adopting the magnetic ring combination 3, and the connecting system is firm and reliable. The engagement angle a of the large tooth surface of the magnetic ring is larger than the rising angle of the used threaded connection.

Fig. 9 shows an example of the application of the combination of the present invention, if a right-handed threaded fastener is used, the magnetic ring combination 3 of the present invention can be placed between the bolt 6 and the connected member 4, and the bolt fastening direction should be clockwise when viewed from the top to the bottom.

The utility model discloses the combination is anticipated to make device, equipment no matter in static environment, or under the dynamic state, even in extremely abominable motion operating mode such as vibration, impact, alternating load, the ring combination all can rely on the unique structure of self and the magnetic property of innovation to make the connecting piece with by connecting piece fastening connection, does not lead to becoming flexible, takes off, improves the connection reliability and the operational safety of device, equipment to the at utmost.

Claims

1. A magnetic ring for loosening prevention of a threaded fastener is characterized in that: the magnetic ring is sheet-shaped, two end faces of the magnetic ring are respectively provided with wedge-shaped teeth with different sizes, wherein one end of each small tooth forms a small tooth surface, and one end of each large tooth forms a large tooth surface; the included angle between the magnetic pole direction of the magnetic ring and the geometric axial direction of the magnetic ring is less than or equal to 5 degrees.

2. The magnetic ring for loosening prevention of threaded fasteners as claimed in claim 1, wherein: the large tooth surfaces of the two magnetic circular rings are in buckling fit to form a magnetic circular ring group, the N-level of one magnetic circular ring points to the small tooth surface, the N-level of the other magnetic circular ring points to the large tooth surface, and the small tooth surfaces of the two magnetic circular rings form two ends of the magnetic circular ring group and respectively display the magnetic N-level and the magnetic S-level.

3. The magnetic ring for loosening prevention of threaded fasteners as claimed in claim 2, wherein: two or more magnetic ring groups are matched through magnetic superposition to form more magnetic ring combined parts.

4. The magnetic ring for loosening prevention of threaded fasteners as claimed in claim 1, wherein: the inner diameter of the magnetic circular ring is phi 3mm to phi 240mm, the outer diameter thereof is phi 5mm to phi 600mm, and the thickness thereof is 0.2mm to 25 mm.

5. The magnetic ring for loosening prevention of threaded fasteners as claimed in claim 1, wherein: the magnetic ring is made of steel, stainless steel or alloy metal.

6. The magnetic ring for loosening prevention of threaded fasteners as claimed in claim 5, wherein: the steel material is 27MnCrB5 grade spring steel, and the stainless steel material is 022Cr17Ni12Mo2 grade austenitic stainless steel.

7. The magnetic ring for loosening prevention of threaded fasteners as claimed in claim 6, wherein: the magnetic performance remanence of the magnetic ring is 0-10 kGs, the magnetic induction strength coercive force is 0-20 kOe, and the magnetic energy product is 0-30 MGOe.