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Shape memory alloy type steel plate spring and method for achieving variable rigidity

A technology of leaf spring and memory alloy, applied in the direction of spring, spring/shock absorber, spring/shock absorber functional characteristics, etc., can solve the problem of restricting ride comfort and ride comfort, reducing leaf spring life, affecting ride comfort, etc. problems, to achieve the effect of improving ride comfort, saving energy, and overcoming high quality

Active Publication Date: 2016-03-23
JIANGSU UNIV
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Problems solved by technology

However, friction between multiple alloy spring pieces is easy to occur, which not only reduces the life of the leaf spring, but also produces certain noise, which affects the ride comfort
And for the high-speed development of the vehicle industry, the passive suspension with fixed parameters limits the improvement of ride comfort and ride comfort, so a leaf spring with variable stiffness is required

Method used

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  • Shape memory alloy type steel plate spring and method for achieving variable rigidity
  • Shape memory alloy type steel plate spring and method for achieving variable rigidity
  • Shape memory alloy type steel plate spring and method for achieving variable rigidity

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with accompanying drawing:

[0022] Such as Figure 1-2 As shown, a shape memory alloy leaf spring includes an axle 6 , a spring leaf 5 , a saddle bolt 4 , a coil ear 3 , an electromagnet 2 , and a energized coil 1 . The center of the spring leaf 5 is clamped and fixed on the axle 6 with a saddle bolt 4 , and the two ends of the spring leaf are bent into roll ears 3 . What the material of described spring sheet 5 used is magnetic control type shape memory alloy, and typical ferromagnetic control type shape memory alloy has Ni-Mn-Ga, Ni-Fe-Ga, Fe base alloy (Fe-Pd, Fe-Ni -Co-Ti, etc.) and Co-based alloys (Co-Ni, Co-Mn alloys, etc.) and the like. Along the direction of the axle 6, a pair of electromagnets 2 are arranged equidistantly on the left and right sides of the spring leaf 5 respectively. The electromagnets 2 are wound with a energized coil 1, and the electromagnetic coil 1 is controlled by cont...

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Abstract

The invention provides a shape memory alloy type steel plate spring and a method for achieving variable rigidity. The shape memory alloy type steel plate spring comprises an axle, a spring piece, a u-bolt, coiled lugs, electromagnets and a powered coil. The center of the spring piece is clamped and fixed by the u-bolt. The two tail ends of the spring piece are bent into the coiled lugs. The spring piece is made of memory alloy of a magnetic control type shape memory effect. In the direction of the axle, a pair of electromagnets is distributed on the left side and the right side of the spring piece respectively at equal distance. The powered coil is wound on the electromagnets. The intensity and direction of a magnetic field are controlled by controlling the current flowing through the powered coil. The rigidity of the steel plate spring can be changed according to the car suspension requirement, the suspension performance is improved, and car smoothness and taking comfort are effectively improved.

Description

technical field [0001] The invention relates to an elastic element of a vehicle suspension, in particular to a shape memory alloy leaf spring and a method for realizing variable stiffness. Background technique [0002] Shape memory alloy is an alloy material that can completely eliminate its deformation at a lower temperature and restore its original shape after heating up. It is an intelligent material that can remember its original shape. Usually can be divided into temperature control type shape memory alloy and magnetic control type shape memory alloy. The linear deformation rate of the magnetically controlled shape memory alloy (Magnetically Controlled Shape Memory Alloy, referred to as MSM) can reach 6% and the bending deformation rate can reach 18% at room temperature. Compared with temperature-controlled shape memory alloys, MSM not only has a large deformation rate and is easy to control, but also has a higher dynamic response speed, which is 80 times the frequency...

Claims

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Application Information

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IPC IPC(8): F16F1/22B60G17/02
CPCB60G17/023F16F1/22F16F2224/0208F16F2228/06
Inventor 张龙飞袁朝春高泽宇陈龙吴飞刘慧
Owner JIANGSU UNIV
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