54results about How to "Realize two-way movement" patented technology

A transducer coupling two-way linear ultrasonic motor and an excitation method thereof relate to an ultrasonic motor and an excitation method thereof. For bending type, ∏ type and longitudinal bending compound linear ultrasonic motor, there are problems of small amplitude, small driving force, small output power, and single excitation method. There are four shifting teeth (11-2) of the present invention and they are respectively fixed on the substrate (11-1). The upper end surface of the shifting teeth (11-2) is pasted with a friction layer (11-3), and the transducer vibrator ( 12) is connected to the base plate (11-1), the lower end surface of the mover (1) is in contact with the upper end surface of the friction layer (11-3), and the upper end surface of the mover (1) is in contact with the linear bearing (2). contact, an elastic loading device (5) is installed between the transducer vibrator (12) and the bracket (3). The present invention utilizes the longitudinal vibration mode of two or more transducer vibrators, and is connected to the substrate through screws, so that the shifting tooth plate is coupled with bending vibration, so that the shifting teeth are deflected in different directions. By determining the position of the shifting teeth and the energy conversion The position of the vibrator is determined, and the corresponding excitation method is used to realize the two-way linear motion of the ultrasonic motor.

The invention provides a variable stiffness soft driver and a hand rehabilitation training robot using the driver, wherein the driver includes: a layered driver body, the driver body is made of elastic material, and the driver is covered with a double helical fiber winding layer , the driver body is provided with an air chamber; a variable stiffness layer is arranged in the middle of the air cavity to separate the air cavity into an upper chamber and a lower chamber, and the base of the variable stiffness layer is made of flexible Made of material with high strength and flexibility, which can limit the axial strain of the driver; a low melting point alloy is arranged in the serpentine flow channel inside the variable stiffness layer, and an electrode is connected to the low melting point alloy; The gas source communicates with the upper chamber and the lower chamber respectively through gas pipelines; the control system includes a controller and a stiffness control switch, the stiffness control switch is connected to the power supply device of the electrode, and the controller is simultaneously connected with the driver of the gas source and the Stiffness control switch connection. The driver in the present invention has a large bending range, can meet the activity requirements of the hand joints and has a strong bearing capacity at the same time.

The invention discloses an integrated displacement amplifying mechanism and a moving method thereof. The mechanism uses pulleys to form a U-shaped wire winding mode; and the displacement amplifying mechanism uses a memory deformation effect of SMA wires for converting a horizontal motion to a vertical motion, and realizes the displacement amplification. The moving method realizes a double-travel motion, and increases effective length of shape memory alloy wires in limited mechanism space, so that the deformation is increased, and the mechanism space is saved; an optimized implementation mode can realize an excellent temperature control effect of the shape memory alloy wires through a closed box body; the quick heating of the shape memory alloy wires can be realized through feeding a lot of hot air in a ventilation pipe at the top end of the box body or feeding a certain current in a SMA; and the SMA wires can be quickly cooled by feeding in low-temperature cold air, so that the mechanism acting speed is accelerated.

The present invention discloses a climbing rod actuator in an isosceles trapezoidal arrangement using alternating self-locking, and is characterized in that: a base is fixedly connected with a slidingrod, an upper rotor and a lower rotor are sleeved on the sliding rod, two arc surfaces of the upper rotor and the lower rotor inner holes are respectively in contact with the sliding rod, hinges of the upper rotor and the lower rotor coordinate with rotating shafts of an upper rotating shaft and a lower rotating shaft, and the upper rotor and the lower rotor are connected through the two sets ofrotating shafts, left oblique driving legs, right oblique driving legs, piezoelectric ceramic pre-tightening bolts and piezoelectric ceramic pre-tightening nuts, a upper pressing plate and a lower pressing plate are fixed through the upper rotor and the lower rotor through screws, pressure rollers and the pressure plates are connected through pin shafts, and outer edge of the pressure roller is elastic rubber, and the pressure rollers are suitable in size therefore can have a certain contact pressure with the sliding rod. The climbing rod actuator only needs to arrange the driving legs withinthe self-locking zone of the rotors, to realise alternating self-locking, therefore has low processing requirements. The climbing rod actuator is expected to achieve large pushing force, theoretically, as long as strength is sufficient, the piezoelectric actuator can have same amount of force with amount of force of the driving legs. Although self-locking is utilized, the actuator can achieve two-way motion.