flexure hinge
Release Date:2025-05-14 Source: View count353
Flexible hinge is a small bearing designed to serve as the center of rotation for transmission structures that rotate in a small range, utilizing the small deformation and automatic recovery characteristics of elastic materials. Flexible hinges eliminate the mechanical clearance and friction of traditional bearings, greatly promoting the miniaturization of mechanical structures. Due to the use of elastic materials as pivot connectors, flexible hinges eliminate mechanical friction caused by rigid collisions between the structure and the connectors during rotation. At the same time, by utilizing the self recovering characteristics of elastic materials, they eliminate the phenomenon of backlash in the transmission process of mechanical systems. Flexible hinges have the characteristics of no gap, no friction, high displacement resolution, and small size, and are widely used in MEMS systems, precision instruments, satellite navigation, and other fields. In order to meet different sports needs, it is necessary to design and select a reasonable flexible hinge mechanism. The most common types of flexible hinge mechanisms are lever type, bridge type, diamond type, and Scott Russell mechanism. The brief structure is shown in the following figure.
Common flexible hinge structures
Among these mechanisms, the lever type flexible hinge structure has the characteristics of simple and compact structure, convenient calculation, and large effective amplification ratio. However, at the output terminal of this structure, in addition to the main motion, corresponding parasitic displacement will also be generated. The bridge amplification mechanism and the diamond amplification mechanism are similar in that they both adopt a symmetrical structure. These two mechanisms can maintain a small spatial size under conditions of a larger amplification ratio, and there is no parasitic motion generated at the output terminal. The Scott Russell mechanism is essentially a motion reversing mechanism, where the output and input directions are completely perpendicular and have a certain displacement amplification function. These basic flexible hinge mechanisms have been widely used in piezoelectric drive devices. Based on these mechanisms, some special composite mechanisms such as polygonal flexible hinge mechanisms and multi-stage amplification mechanisms have also been developed and applied.
Flexible hinge is a small bearing designed to serve as the center of rotation for transmission structures that rotate in a small range, utilizing the small deformation and automatic recovery characteristics of elastic materials. Flexible hinges eliminate the mechanical clearance and friction of traditional bearings, greatly promoting the miniaturization of mechanical structures. Due to the use of elastic materials as pivot connectors, flexible hinges eliminate mechanical friction caused by rigid collisions between the structure and the connectors during rotation. At the same time, by utilizing the self recovering characteristics of elastic materials, they eliminate the phenomenon of backlash in the transmission process of mechanical systems. Flexible hinges have the characteristics of no gap, no friction, high displacement resolution, and small size, and are widely used in MEMS systems, precision instruments, satellite navigation, and other fields. In order to meet different sports needs, it is necessary to design and select a reasonable flexible hinge mechanism. The most common types of flexible hinge mechanisms are lever type, bridge type, diamond type, and Scott Russell mechanism. The brief structure is shown in the following figure.
Common flexible hinge structures
Among these mechanisms, the lever type flexible hinge structure has the characteristics of simple and compact structure, convenient calculation, and large effective amplification ratio. However, at the output terminal of this structure, in addition to the main motion, corresponding parasitic displacement will also be generated. The bridge amplification mechanism and the diamond amplification mechanism are similar in that they both adopt a symmetrical structure. These two mechanisms can maintain a small spatial size under conditions of a larger amplification ratio, and there is no parasitic motion generated at the output terminal. The Scott Russell mechanism is essentially a motion reversing mechanism, where the output and input directions are completely perpendicular and have a certain displacement amplification function. These basic flexible hinge mechanisms have been widely used in piezoelectric drive devices. Based on these mechanisms, some special composite mechanisms such as polygonal flexible hinge mechanisms and multi-stage amplification mechanisms have also been developed and applied.
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