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Motion mechanism locking device and method based on inverse flexoelectric effect

A technology of flexoelectric effect and motion mechanism, which is applied in the direction of fixing devices, transportation and packaging, motor vehicles, etc., can solve problems affecting normal use, inconvenient operation, cup deformation, etc. Simple, easy to assemble and disassemble

Active Publication Date: 2020-12-29
CHANGAN UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this locking method has some problems in use, such as inconvenient operation and the need for manual on-site intervention, etc.
Especially for the thin-walled rotating cup, when the electromagnet or locking screw is used to lock the local position, due to the external force, it is easy to cause the local deformation of the cup body after being stressed, which may affect the normal use in the later period

Method used

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  • Motion mechanism locking device and method based on inverse flexoelectric effect
  • Motion mechanism locking device and method based on inverse flexoelectric effect
  • Motion mechanism locking device and method based on inverse flexoelectric effect

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] The flexoelectric effect includes the polarization intensity phenomenon induced by the strain gradient, that is, the positive flexoelectric effect, and the mechanical strain phenomenon induced by the electric field gradient, that is, the reverse flexoelectric effect. Due to the relatively relaxed requirement on crystal structure symmetry, the flexoelectric effect is ubiquitous in all dielectrics, including non-piezoelectric and isotropic materials. The long-term stability of the flexoelectric effect makes it an ideal sensing element for actuators.

[0026] Such as figure 1 As shown, aiming at the locking and positioning problem of the rotating device 9 with the thin-walled circular cup structure, the present invention proposes a locking device for the kinematic mechanism based on the inverse flexoelectric effect. In the resea...

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Abstract

The invention discloses a motion mechanism locking device and method based on the inverse flexoelectric effect. The locking device comprises a supporting rod arranged on a base, a sensitive unit and multiple metal blocks of an arc-shaped structure. The supporting rod is vertically arranged on the base, and the sensitive unit is of an annular structure and is horizontally arranged at the top of thesupporting rod. The multiple metal blocks are uniformly arranged on the outer ring of the sensitive unit. Annular insulating strips are arranged on the outer rings of the multiple metal blocks. A gapis formed between the outer ring of each annular insulating strip and a cup body inner shell of a rotating device. The sensitive unit is made of a flexoelectric dielectric material, and the inner side and the outer side of the sensitive unit are plated with an inner side metal electrode and an outer side metal electrode correspondingly. According to the motion mechanism locking device and methodbased on the inverse flexoelectric effect, position locking of a moving part is achieved based on a flexoelectric effect in a crystal force-electricity coupling effect. Compared with a traditional electromagnet, a mechanical buckle or a locking screw, the device is easy to use and convenient to disassemble and assemble, and a complex mechanical structure is not needed.

Description

technical field [0001] The invention relates to the technical field of equipment manufacturing, in particular to a motion mechanism locking device and method based on an inverse flexoelectric effect. Background technique [0002] In aerospace equipment, some rotating parts need to be positioned during lift-off, landing and work. Electromagnets, mechanical buckles or locking screws are often used to lock them with the base to maintain a high-precision positioning relationship. However, this locking method has some problems in use, such as inconvenient operation and the need for manual on-site intervention. Especially for thin-walled rotating cups, when electromagnets or locking screws are used to lock the local positions, the cup body is easily deformed due to external force, which may affect the normal use in the later stage. Contents of the invention [0003] The object of the present invention is to provide a moving mechanism locking device and method based on the inver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B1/02B64G1/22
CPCB64G1/22F16B1/02
Inventor 胡涛涛王栋王学智康志斌胡雄
Owner CHANGAN UNIV
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