Connection pair for lock nut with memory alloy ring

Abstract

The invention discloses a connection pair for a lock nut with a memory alloy ring. The connection pair is used for locking a connected piece and comprises a locking piece with a thread, and a memory alloy gasket arranged on the locking piece in a penetrating manner and making contact with the surface of the connected piece. The connection pair is simple in structure and firm in locking, further has good corrosion resistance and can be used on fastening parts in harsh environments such as ships and the chemical industry.

Description

technical field [0001] The invention relates to the field of fasteners, in particular to a connection pair of lock nuts with memory alloy rings. Background technique [0002] Fasteners are a type of mechanical parts used for fastening connections and are widely used. They are widely used in industries such as energy, electronics, electrical appliances, machinery, chemicals, metallurgy, molds, and hydraulic pressure. Various fasteners can be seen on various machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemicals, instruments and supplies, and are the most widely used machinery. Basic pieces. Fasteners will loosen due to equipment vibration or environmental corrosion during long-term use, causing the connected parts to disintegrate and fall off, resulting in safety accidents or economic losses. [0003] In existing anti-loosening joints, gaskets are usually placed between ordinary nuts and bolts, and the elastic force of...

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Problems solved by technology

However, the gasket has poor anti-seismic ability in a high-vibration environment, and it is difficult to meet the anti-loosening requirements, and the tightening torque is relatively large, which brings a lot of inconvenience to the maintenance and repair of various equipment.

[0004] In view of the above shortcomings, the commonly used anti-loosening methods are: 1. Mechanical anti-loosening. This method is to directly limit the relative rotation of the lock nut with a lock nut stopper, which has the disadvantage of inconvenient disassembly. Series connection of steel wire and stop washer, etc., because the lock nut stopper has no pre-tightening force, the anti-loose stopper will only work when the lock nut is loose and back to the stop position. Therefore, the method of using the lock nut is practical 2. Riveting to prevent loosening. After tightening, punching, welding, bonding and other methods are used to make the lock nut pair lose the characteristics of the moving pair and the connection becomes non-detachable. The disadvantage is that the bolt rod can only be used once, and it is very difficult to disassemble, and the bolt pair must be destroyed to disassemble; 3. Friction anti-loosening, which is the most widely used anti-loosening method, this method is produced between lock nut pairs. A positive pressure that does not change with the external force to generate a frictional force that can prevent the relative rotation of the lock nut pair. This positive pressure can be achieved by compressing the lock nut pair axially or simultaneously in two directions, such as using an elastic washer , double nuts, self-locking nuts and insert lock nuts, etc.; 4. The structure is anti-loosening, which is to use the structure of the lock nut pair itself, and adopt the anti-loosening method of positive and negative threads

[0005] In the above technical solutions, there are generally disadvantages such as complex structure, inconvenient disassembly of the connecting pair, poor corrosion resistance, and high requirements for the use environment.

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