Vibration isolation device with high attitude precision

Abstract

The invention relates to a vibration isolation device with high attitude precision. The vibration isolation device comprises a vibration isolation support frame, cylindrical helical compression springs, dampers and a negative stiffness mechanism; the vibration isolation support frame is composed of a top plate, a middle plate and a bottom plate; the four sets of cylindrical helical compression springs are vertically connected to the positions, close to the four corners, between the bottom plate and the middle plate correspondingly; the four dampers are vertically connected to the positions ofthe four corners between the bottom plate and the top and penetrate through receding holes in the middle plate; the negative stiffness mechanism is connected between the bottom plate and the middle plate; the negative stiffness mechanism comprises a central fixed support and four groups of elastic connecting assemblies; and the lower end of a center fixing support is fixedly connected with the middle of the upper end of the bottom plate, the inner ends of the four groups of elastic connecting assemblies are hinged to the front position, the rear position, the left position and the right position of the upper end of the center fixing support respectively, and the outer ends of the four groups of elastic connecting assemblies are hinged to the front position, the rear position, the left position and the right position of the middle plate respectively. According to the vibration isolation device with high attitude precision, the actual requirements of inertial equipment on vertical low-frequency vibration isolation performance and high-precision attitude requirements are met.

Description

technical field [0001] The invention belongs to the technical field of inertial equipment, relates to the vibration reduction technology of inertial equipment, and in particular relates to a vibration isolation device which has superior vertical low-frequency vibration isolation characteristics and can maintain high-precision attitude at the same time. Background technique [0002] The conventional vertical vibration reduction method for inertial equipment is to use a combination of cylindrical helical compression springs, leaf springs and dampers. The cylindrical compression spring acts as the main elastic element for vibration reduction, and the leaf spring structure plays the role of attitude maintenance. The damper acts as a buffer energy absorber to suppress resonance amplification and attenuate vibration response. The processing and assembly of the leaf spring attitude maintaining structure is difficult, and in order to meet the high-precision attitude maintaining requ...

AI Technical Summary

Problems solved by technology

The processing and assembly of the leaf spring attitude maintaining structure is difficult, and in order to meet the high-precision attitude maintaining requirements, the leaf spring structure must have sufficient angular stiffness, resulting in the inability to effectively reduce the vertical comprehensive stiffness and meet the needs of low-frequency vibration isolation

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