Plate spring based on shape memory alloy and vibration isolation and damping method thereof

Abstract

The invention discloses a plate spring based on shape memory alloy and a vibration isolation and damping method thereof. The plate spring based on the shape memory alloy is characterized in that a main plate spring set is arranged between a top layer plate spring and a secondary plate spring, wherein the main plate spring set is composed of a plurality of main plate springs with different lengths;a shape memory alloy thin plate is arranged between the top layer plate spring and the adjacent main plate spring; a shape memory alloy thin plate is mounted between two adjacent main plate springs;a shape memory alloy thin plate is mounted between the secondary plate spring and the adjacent main plate spring; the main plate springs are all made of I-steel, and the left side and the right side of a middle support plate of each main plate spring are correspondingly provided with a shape memory alloy rope in an attaching mode; the two ends of the two shape memory alloy ropes are correspondingly compressed and fixed to two screw holes through fastening bolts; and the two shape memory alloy ropes are in a tensioning state after being compressed and fixed. With the adoption of the plate spring based on the shape memory alloy, the vibration damping effect of the plate spring is ensured, and meanwhile, an original structure can be quickly returned after the plate spring deforms.

Description

technical field [0001] The invention relates to a leaf spring and a vibration isolation method thereof, in particular to a shape memory alloy-based leaf spring and a vibration isolation method thereof. Background technique [0002] Leaf spring, also known as leaf spring, is an elastic beam of approximately equal strength composed of several alloy spring sheets of equal width but unequal length (the thickness can be equal or not). The most widely used elastic suspension component in the vehicle plays an elastic connection between the frame and the axle, reducing the bumpy feeling of the vehicle on the road and ensuring the stability and comfort of the vehicle during driving. In addition, the leaf spring also acts as a guiding mechanism, controlling the wheels to travel on a prescribed track relative to the body, thereby ensuring good operability and stability. It can be seen that a leaf spring with good performance can not only ensure the comfort of the driver and passengers...

AI Technical Summary

Problems solved by technology

[0003] As an important performance of the leaf spring, its three key indicators of stiffness, strength and vibration damping have always been three difficulties in the field of engineering technology. If the stiffness is too small, the vibration damping of the leaf spring can be improved, but when the leaf spring is impacted Large deformation will occur, and the speed of returning to the original structure after deformation is slow, which will affect the stability of the vehicle; if its strength is too high, the vibration damping performance of the leaf spring will be reduced, and the stiffness will be too large, which will affect the driving of the vehicle comfort

[0004] The leaf springs commonly used at present are mainly divided into two forms: multi-leaf spring and less-leaf spring. These two forms are mainly different in thickness and structure, and are basically the same in other performance aspects. These forms have differences in application. Some defects or deficiencies, that is, on the one hand, their mass and volume are relatively large, the corresponding energy storage capacity per unit volume is small, and the vibration isolation and vibration reduction effect is poor; on the other hand, the friction between the plates of the multi-plate spring is large, Not only reduces the elasticity of the structure, but also makes the vibration noise of the leaf spring larger

Therefore, for the vibration damping mechanism, material and structure adopted by the existing leaf springs, it is difficult to achieve an efficient matching relationship between stiffness, strength and vibration damping at the same time.

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