A new type of stewart shock absorber

Abstract

The invention discloses a noel Stewart absorber. The novel Stewart absorber comprises a top plate, a bottom plate and six telescopic legs. Six first connecting angles are arranged on the bottom surface of the top plate, six second connecting angles are arranged on the top surface of the top plate; each telescopic leg comprises a first universal hinge, a first connecting rod, a diaphragm spring, anegative stiffness mechanism and a second universal hinge which are successively connected, the first universal hinges are connected with the first connecting angles, the second universal hinges are connected with the second connecting angles; the negative stiffness mechanism comprises a shell, an external magnet is fixedly arranged on the inner wall of the shell, the diaphragm spring is fixedly connected with the shell, the ends, close to the diaphragm springs, of the first connecting rods are connected with a supporting rod, the end, away from the first connecting rods, of the supporting rod, penetrates through the diaphragm springs and the shell and extends into the shell, an inner magnet repelling the outer magnet is fixedly arranged on the supporting rod corresponding to the outer magnet, gaps are formed between the inner magnet and the outer magnet, and the supporting rod is radically and slidably matched with the diaphragm springs correspondingly. According to the noel Stewart absorber, the damping effect is great.

Description

technical field [0001] The invention relates to the technical field of vibration isolation equipment, in particular to a novel Stewart shock absorber. Background technique [0002] Vibration is an extremely common physical phenomenon in industrial production and people's life. The harm caused by vibration cannot be ignored. In the field of mechanical processing, vibration will cause wear of the mechanical structure and reduce processing accuracy; in the field of transportation, vibration will reduce safety and comfort; in the field of aerospace, many rocket launch failures are due to Vibration-induced faults; in the field of civil engineering, vibration can cause bridges to break, buildings to collapse, and even casualties. In view of the many hazards caused by vibration, vibration control has become an urgent research task for scholars and engineers. Vibration control is divided into three categories: passive vibration reduction, semi-active vibration reduction and active...

AI Technical Summary

Problems solved by technology

Vibration control is divided into three categories: passive vibration reduction, semi-active vibration reduction and active vibration reduction. These three control methods have their own advantages and disadvantages: active control eliminates the vibration source or reduces the energy or frequency of the vibration source during design, although it is relatively Compared with the traditional passive vibration reduction, it has the characteristics of excellent low-frequency vibration reduction effect, but it has poor environmental adaptability, is not suitable for use in seawater and other environments, consumes a lot of energy, has a complex structure, and is difficult to repair; semi-active vibration reduction can be adjusted according to demand Effect, the effect is between active and passive; passive vibration reduction has the advantages of simple structure, reliability, no consumption of external energy during work, and easy implementation. The existing passive vibration absorber generally has poor low-frequency vibration reduction effect

[0003] Existing shock absorbers are usually single-degree-of-freedom, and there are not many devices that can achieve six-degree-of-freedom vibration reduction. Among them, the Stewart platform has attracted the attention of many researchers because of its strong load capacity, high precision, and multiple degrees of freedom. In the existing Stewart platform, when the relative displacement of the upper and lower plates in the horizontal direction is relatively large, the adjacent two legs are likely to interfere, and the torque capacity on the x-y plane and around the Z axis is poor, and the vibration reduction effect is poor

Images