Shape memory alloy driven retractable small actuator and control circuit thereof
A technology of memory alloy and memory alloy wire, which is applied in the direction of machines/engines, mechanisms for generating mechanical power, mechanical equipment, etc., can solve the problems of large driving force and large stroke, and achieve the effect of large stroke and small volume
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[0029] Example one
[0030] Such as figure 1 As shown, a shape memory alloy-driven telescopic micro actuator includes a fixed end 1, a return spring (not shown in the figure), a shape memory alloy wire 3, and a plurality of groups connected by two long rods 4 in the middle of a riveting piece. Long rod group, four short rods 2, working end 5,
[0031] At the fixed end 1, one ends of the two short rods 2 are connected by rivets,
[0032] At the working end 5, one ends of the other two short rods 2 are connected by rivets;
[0033] Multiple groups of long rods are connected in pairs to form a long rod member. The connection between two adjacent long rod groups is: one end of the two long rods 4 of a long rod group is connected to the other by riveting. One end of the two long rods 4 of the rod group.
[0034] The two long rods 4 of the long rod group at one end of the long rod member are riveted to the other ends of the two short rods 2 of the fixed end 1 respectively.
[0035] The...
Example Embodiment
[0046] Example two
[0047] Such as figure 2 As shown, a shape memory alloy-driven retractable micro actuator control circuit adopts the shape memory alloy described in the first embodiment to drive the retractable micro actuator, and includes a DC power supply 6, a sliding resistor 7, and a switch 8. The DC power supply 6, the sliding resistor 7, the shape memory alloy wire 3 and the switch 8 of the shape memory alloy driving the retractable micro actuator are connected in series in sequence.
[0048] The control principle is as follows:
[0049] The closing and opening of the switch 8 controls the energization and de-energization of the shape memory composite wire 3, thereby controlling the shape memory alloy to drive the retractable micro actuator, that is, the retractable micro actuator is extended when the switch is closed, and when the switch is opened The retractable micro actuator shrinks. When the sliding rheostat 7 slides, the resistance of the loop is changed, and the c...
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