Micro small sma movable tooth drive motor
A movable tooth transmission, miniature technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc. Miniaturization of the device, difficulty in swinging, etc., to achieve the effect of large driving force, simplified structure, and increased universality
Active Publication Date: 2021-04-30
YANSHAN UNIV
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Problems solved by technology
[0002] Existing motors are electromagnetic mutual conversion to realize the conversion of electric energy to kinetic energy, and the large volume consumes a lot of resources. With the continuous development of aerospace, intelligent robots, and automotive fields, the requirements for micro-integrated motors are becoming more and more extensive.
The literature [Electromechanical Integrated Shape Memory Alloy Harmonic Transmission] studies a SMA-driven movable tooth transmission device. The movable tooth transmission link of the device adopts radial movable tooth transmission, because the radial meshing force limits the radial swing of the shock wave. Therefore, it is difficult to realize the continuous meshing of the movable tooth meshing pair driven by SMA; in addition, the balance spring of the device is an extension spring, which needs to be fixed by a tension mechanism, and it is difficult to realize the miniaturization of the device; thirdly, the fixing method of the memory alloy wire of the device The usable length of the memory alloy wire is limited, and it is very difficult for a short memory alloy wire to achieve a given eccentric swing
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[0033] Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0034] In the present invention, in order to clearly describe each component, "upper" and "lower" are added before the name of the component to show the distinction, "upper" and "lower" are based on the position of the drawings, and the position of the component changes during the actual installation process. The appellation of its orientation changes accordingly, which cannot be regarded as limiting the protection scope of the patent.
[0035] Such as figure 1 As shown, the embodiment of the present invention provides a miniature SMA movable gear motor, the device includes a housing, a driving part and a transmission part.
[0036] The embodiment of the present invention adopts movable teeth to reduce speed, and the speed reduction transmission ratio is:
[0037] i=z K / (z K -z G )
[0038] where i is the transmission ratio, z K is the number of active teeth, z ...
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The invention provides a miniature SMA movable gear motor, which includes a housing, a driving part and a driving part. The driving part adopts the way that SMA wire is wound on the threaded jacket of the shock wave device and the pressure spring is jointly driven, which increases the length of the SMA wire. It is convenient to realize the set eccentric movement, and the compression spring reduces the tension mechanism compared with the previous tension spring, which is convenient to realize miniaturization and can provide greater driving force; the transmission part adopts the way of movable rack to fix the center wheel output to realize continuous transmission, Low-speed and high-torque output is realized; the movable rack is fixed between the upper outer cylinder and the lower outer cylinder by screws, and there is a gap between the shock wave device and the center wheel. This structure simplifies the structure and is more convenient to install; the center The wheel is used as a rotatable output device, and a through hole is processed for installing the output shaft, which increases the universality.
Description
technical field [0001] The invention belongs to the technical field of micro-integrated motors, and relates to a micro-miniature SMA movable tooth-driven motor. Background technique [0002] Existing motors use electromagnetic mutual conversion to convert electric energy to kinetic energy, and their large size consumes a lot of resources. With the continuous development of aerospace, intelligent robots, and automotive fields, the requirements for micro-integrated motors are becoming more and more extensive. The literature [Electromechanical Integrated Shape Memory Alloy Harmonic Transmission] studies a SMA-driven movable tooth transmission device. The movable tooth transmission link of the device adopts radial movable tooth transmission, because the radial meshing force limits the radial swing of the shock wave. Therefore, it is difficult to realize the continuous meshing of the movable tooth meshing pair driven by SMA; in addition, the balance spring of the device is an ext...
Claims
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IPC IPC(8): H02N2/12
CPCH02N2/12H02N2/123
Inventor 许立忠王晓翠王婷婷付正龙李瑞兴张广
Owner YANSHAN UNIV