Drilling device based on positive and negative stiffness vibration reduction technology

Abstract

The invention discloses a drilling device based on a positive and negative stiffness vibration reduction technology, and belongs to the technical field of vibration isolation device design. The drilling device comprises a positive and negative stiffness device for providing transverse vibration reduction, a vibration isolation support for providing a longitudinal negative stiffness effect and a drilling execution element at the tail end of the mechanical arm; the positive and negative stiffness device for providing transverse vibration reduction comprises a cross-shaped three-dimensional positive and negative stiffness honeycomb structure, a variable stiffness spring device, a limiting rod and a flange plate, wherein the cross-shaped three-dimensional positive and negative stiffness honeycomb structure is formed by crossing two two-dimensional unit cell honeycomb structures. A cross-shaped three-dimensional positive and negative stiffness honeycomb structure combining positive stiffness and negative stiffness is adopted, transverse vibration generated during drilling is reduced, the vibration isolation support is adopted to reduce the influence caused by longitudinal vibration, vibration of drilling force on the mechanical arm is reduced, and the drilling precision is improved. In addition, negative stiffness self-adaptive adjustment is achieved by changing the cross section and thickness of the curved beam of the negative stiffness honeycomb single-cell structure.

Description

technical field [0001] The invention relates to a drilling device based on positive and negative stiffness vibration reduction technology, and belongs to the technical field of vibration isolation device design. Background technique [0002] In the field of elevator guide rail installation, the drilling electric hammer is installed on the end joint of the mechanical arm, which can automatically drill holes on the wall of the well, and complete the automatic drilling of the elevator guide rail installation bracket holes, avoiding the installation workers in the "dangerous, complicated, Dirty, heavy" working environment, manual drilling, greatly reducing the labor intensity of workers. When the electric hammer is installed on the mechanical arm for drilling work, the drilling force generated is an external load with a certain excitation, which is applied to the end joint of the mechanical arm, which will cause vibration of each joint of the mechanical arm and the arm connectin...

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Problems solved by technology

In addition, the device uses a "ten"-shaped three-dimensional positive and negative stiffness honeycomb structure, in which the thickness D of the second curved beam is greater than the thickness d of the first curved beam, so that the "ten"-shaped three-dimensional positive and negative stiffness honeycomb structure is evenly distributed in variable Around the rigidity spring device, it solves the problem of uneven stress on the negative stiffness structure and poor reusability when the device is subjected to variable loads

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