Constant force compliant mechanism

Abstract

A constant force compliant mechanism comprises a base and constant force units. The base is a polygon with the equal side length. Each edge of the base is provided with one constant force unit perpendicular to the face where the base is located, and therefore the constant force compliant mechanism is formed. Each constant force unit comprises a fixed end, an output end, reeds and a guide rod, wherein the fixed end is of a polygonal frame structure, one end of the fixed end is fixedly arranged on the base, the other end of the fixed end is provided with a guide rod, the guide rod is in slidingconnection with the fixed end, the side, close to the guide rod, in the fixed end frame is provided with the output end, the two sides of the output end are connected with the fixed end frame throughthe multiple reeds, and the output end and one end of the guide rod are fixedly connected. The whole structure is symmetrically arranged, the stress condition is good, the output force fluctuation issmall, the guide device is arranged, and the precision is high.

Description

technical field [0001] The invention belongs to the field of machinery, in particular to a constant force compliance mechanism. Background technique [0002] The compliant constant force mechanism can maintain a constant output force within a certain stroke, so it has been widely used in many fields and occasions, such as the clamping of fragile or irregular objects, pipe cleaning, thermal power generation, force correction, quality measurement, robot end execution device etc. At present, the methods for obtaining constant force include: mechatronics, gravity balance and other methods. Mechatronics technology can realize precise control of force by introducing feedback into the system, but the control system is relatively complicated. At the same time, the cost of force sensors is high, and they are easily disturbed by noise, so their reliability is not high. The gravity balance method uses the gravity of the weight as the input of the constant force, which can obtain high...

AI Technical Summary

Problems solved by technology

Mechatronics technology can realize precise control of force by introducing feedback into the system, but the control system is relatively complicated. At the same time, the cost of force sensors is high, and they are easily disturbed by noise, so the reliability is not high

The gravity balance method uses the gravity of the weight as the input of the constant force, which can obtain high precision, but this kind of device has high requirements for the installation position, and it is difficult to meet the actual application conditions

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