32results about How to "With power-off self-locking function" patented technology

The invention provides a piezoelectric linear motor and a working method thereof. The piezoelectric linear motor comprises a bottom plate, wherein a bidirectional power output mechanism, a clamping mechanism and a driving mechanism are fixedly connected onto the bottom plate; the bidirectional power output mechanism comprises a movable pretightening rod and a fixed pretightening rod which are intersected in a crossing way; fixed pretightening blocks are connected with the two ends of the fixed pretightening rod respectively; movable pretightening blocks are connected with the two ends of the movable pretightening rod respectively; a piezoelectric actuating unit is connected between each fixed pretightening block and the adjacent movable pretightening block; the movable pretightening rod is connected with the clamping mechanism through an output shaft; the clamping mechanism is connected with the driving mechanism through a gear pair. Through application of the bidirectional power output mechanism, a relatively large thrust and a relatively large pull can be supplied synchronously in the output direction, and are almost equal; through thread clamping self locking, output displacement is accumulated, so that a relatively large stroke can be generated, and the motor has a relatively high position precision and has a power-off self-locking function.

The invention designs a finger side swinging and opposing mechanism of a five-finger dextrous hand based on a screw linkage mechanism. Dextrous movement of all fingers are satisfied, and additionally, the finger side swinging and opposing mechanism has the poweroff self-locking pose keeping ability, so that the grasping function of the five-finger dextrous hand is obviously increased, and different requirements of the five-finger dextrous hand for reliably grasping different articles are satisfied. The side swinging and opposing mechanism which is designed by using the screw linkage mechanism as a core component is mainly composed of an N20 screw gear motor as a power component, sliding blocks, a linkage pair, a palm mainboard, a thumb D shaft fixed frame, hinges and accessories, wherein the thumb D shaft fixed frame is used for fixing a D shaft of a thumb root joint; the palm mainboard is a base on which the screw gear motor, fingers, an opposing small plate and the hinges are connected; linkages are movement transmission components for connecting the sliding blocks with finger roots and the palm mainboard with the opposing small plate and the palm mainboard with the thumb D shaft fixed frame; the hinges are used for connecting the opposing small plate with a rack, and a bearing and a shaft are mainly used in the side swinging driving aspect of the fingers, so that the rotating efficiency and the movement flexibility can be increased.

The invention discloses a high-precision large-torque piezoelectric rotary actuation apparatus with an H-type structure and a method. An actuator comprises an actuator base, an output shaft mounted on the base and capable of rotating freely, two actuator arms connected with the output shaft through a flexible hinge respectively, rhombic rings connected to the end parts of the actuator arms, piezoelectric ceramics mounted in the rhombic rings, a piezoelectric ceramic 6 connected between the actuator arms, and an upper top cover connected with the base through a support column. The distance between the base and the top cover after the installation is smaller than the transverse length of the rhombic rings, so that the piezoelectric ceramics can be ensured to lock the rhombic rings by installation pre-tightening in a power failure condition and the rotary motion of the output shaft can be locked. The invention furthermore provides the actuation method for the actuator. The piezoelectric ceramics are driven according to a certain sequence, so that the high-precision large-torque rotary motion of the actuator can be output. The apparatus has the characteristics of light structure weight, small size, capability of outputting large torque and large rotary angle, and low power consumption of self-locking in power failure. The apparatus and the method have wide application prospects and extremely high application values.

The invention discloses a counterweight type variable contact force piezoelectric motor, which comprises a piezoelectric body and a moving part. The elastic expansion and contraction direction of the piezoelectric body is perpendicular to the action direction of the piezoelectric motor; at the same time, the piezoelectric body is hinged to the transverse base, and the connecting line between the piezoelectric body and the transverse base is parallel to the action of the piezoelectric motor direction. Therefore, the piezoelectric motor of the present invention has a large thrust, a large stroke, can move in both directions, has a long life, and has a power-off self-locking function at the same time.

The invention discloses a piezoelectric motor. The piezoelectric motor comprises a piezoelectric body, a moving part and an elastic connecting part, wherein the piezoelectric body contacts with the moving part elastically through elastic deformation of the elastic connecting part, the piezoelectric body comprises a guide box and a piezoelectric actuating unit which is arranged inside the guide box, the guide box comprises a guide box body and an actuating unit installation face, the actuating unit installation face is arranged on the guide box body and is connected with the guide box body in a flexible mode, the piezoelectric actuating unit is in an axial symmetric structure and comprises a base body, a driving foot and two groups of laminated piezoelectric stacks, the two groups of laminated piezoelectric stacks are arranged between the base body and the driving foot in a pressing mode, the base body is fixedly connected with the actuating unit installation face, the driving foot extends out of an inner cavity of the guide box and then contacts with the moving part, one end of the elastic connecting part is fixed with the guide box body, the other end of the elastic connecting part contacts with an end portion of the base body, which is opposite to the driving foot, and each of the two groups of laminated piezoelectric stacks is connected with a corresponding excitation power supply. Thus, the piezoelectric motor has the advantages of being large in thrust, low in manufacturing cost, long in life and high in efficiency, and simultaneously, the piezoelectric motor has a power-down self-locking function.

The invention discloses a piezoelectric stepping motor comprising a guiding box, a movement piece, a base, a prepressing spring and a piezoelectric actuation module arranged in the guiding box. The piezoelectric actuation module is formed by a plurality of double-layer piezoelectric units, and a plurality of working modes can be realized through applying different excitation power supplies. The piezoelectric stepping motor has a power-off self-locking function. The piezoelectric stepping motor is high in precision, good in stability, long in service life, and easy to realize batch production and has good social benefit.