10 results about "Driven element" patented technology

The invention relates to a power transmission box whose bearing (9) comprises a driving element (10) and a driven element (11) each having two bearing tracks (10a, 10b;11a, 11b) forming two paths (12, 13) in each of which a row (14, 15) of spherical rolling bodies (16) is arranged, the rows (14, 15) being arranged opposite an upstream portion (10a1, 10b1) – respectively downstream portion (11a2, 11b2) – of the leading tracks (10a, 10b) – respectively driven tracks (11a, 11b) –, the leading element (10) comprising a leading ring (17) and the driven element (11) comprising two driven rings (18, 19) on each of which is formed a portion (11a4, 11a2) of the first track (11a), the osculation rates of the upstream portion (10a1) and the downstream portion (11a2) are each between 0.51 and 0.57, the sum the osculation rates of the upstream portion (10b1) and the downstream portion (11b2) being less than the sum of the osculation rates of the upstream portion (10a1) and the downstream portion (11a2). Figure 3;

The application provides a device for driving a wafer carrier, comprising: a wedge and a shock-absorbing seat; the wedge comprises a wedge body and a piezoelectric driving element embedded therein, the piezoelectric driving element is configured to expand when energized, drive a part of the wedge body to generate micro motion, and lift the wafer carrier; the upper surface of the shock-absorbing seat is arranged to be higher than the upper surface of the wedge in the initial state, so that the wafer carrier preferentially contacts the shock-absorbing seat to achieve buffering when falling. The application cooperatively designs the shock-absorbing seat and the piezoelectric driving wedge, which can not only realize high-precision driving at the nanometer level, but also effectively buffer the falling impact and protect the wafer.

This invention discloses a single-ended excitation broadband transducer, comprising a front cover plate, a transducer drive element, and a rear cover plate sequentially fixedly connected by prestressed screws. The transducer drive element includes a piezoelectric ceramic drive crystal stack and a metal resonant structure arranged sequentially along the axial direction. The length of the piezoelectric ceramic drive crystal stack is one-quarter of its first-order longitudinal vibration wavelength; the length of the metal resonant structure is one-quarter of its first-order longitudinal vibration wavelength, and the longitudinal vibration resonant frequencies of the piezoelectric ceramic drive crystal stack and the metal resonant structure are the same. Because the transducer drive element of this invention includes a piezoelectric ceramic drive crystal stack and a metal resonant structure arranged sequentially along the transducer's axial direction, the transducer can still achieve full excitation of the first three longitudinal vibration modes, making the transducer's emission voltage response tend to be flat within the target frequency band. At the same time, it reduces the use of the piezoelectric ceramic drive crystal stack, avoiding waste and reducing manufacturing costs.

The invention relates to a system (10) for transmitting, by power-line carriers, a data signal to be transmitted (S1), in a turbine engine, which system comprises a power supply device (20, 120) comprising at least one unmovable part (22, 122) rigidly connected to the frame portion and configured to receive an input power signal (Pp1, E1); as well as a rotating part (24, 124) rigidly connected to the rotary drive element for rotation therewith and magnetically coupled to the unmovable part such that it is configured to output an output power signal (Pd1') for electrically powering the electrical equipment; a modulation unit (30) configured to apply at least one modulation to the data signal to be transmitted (S1) so as to output a modulated data signal to be transmitted (S1m) having a reduced energy level and a frequency that is higher than the frequency of the input power signal; and a coupling module (40) configured to superimpose the modulated data signal to be transmitted (S1m) onto the input power signal.

The present invention provides a drive element that can suppress unwanted vibrations that occur during the resonant operation of the movable part, while also suppressing damage to the torsion part due to torsional stress. [Solution] The drive element 1 comprises a movable part 20 that performs resonant operation around a rotation axis R1 at a target frequency, a torsion part 12 that extends along the rotation axis R1 and has one end connected to the movable part 20, a drive unit 11 having a tuning fork vibrator 111 connected to the other end of the torsion part 12, and a base 30 that supports the drive unit 11. The resonant operation of the movable part 20 at the target frequency is the operation of the movable part 20 in an inverse phase mode in which the movable part 20 repeatedly rotates in the opposite phase to the tuning fork vibrator 111. The natural frequencies of the portion consisting of the movable part 20 and the torsion part 12 and the natural frequency of the drive unit 11 are adjusted so that the position of the node in which the twisting direction of the torsion part 12 switches in the inverse phase mode is near the other end of the torsion part 12.

For a piezoelectric actuator used to linearly drive a driven element by inducing elliptical motion in a vibrating element through vibration of the piezoelectric element, a drive device is provided that improves control at very low speeds and / or enables the use of a smaller boost circuit to provide the drive voltage for the piezoelectric actuator. According to one embodiment, a drive device for axially driving a driven element is provided. The driving device includes: a piezoelectric actuator, wherein the piezoelectric actuator includes a vibrating element in contact with a driven element and one or more sets of piezoelectric elements attached to the vibrating element; and a controller, wherein each set of piezoelectric elements includes one or more piezoelectric elements, and in each set of piezoelectric elements, a first electrode for expanding or contracting a first region of the piezoelectric element in the set of piezoelectric elements and a second electrode for expanding or contracting a second region of the piezoelectric element in the set of piezoelectric elements are arranged along the axial direction, wherein in each set of piezoelectric elements, a common third electrode or a separate third electrode paired with the first electrode and the second electrode is provided, such that the vibrating element of the piezoelectric actuator has: a bending mode, wherein the middle portion along the axial direction becomes convex or concave, thereby causing the ends of the vibrating element to move along the axial direction at both ends; and an expansion / contraction mode, wherein one end expands / contracts at both ends of the axial direction, while the other end expands / contracts with opposite phases over time, thereby causing the ends of the vibrating element to move in a direction perpendicular to the axial direction. The controller is used to cause the vibrating element to vibrate by applying oscillating voltage signals of the same frequency to the first and second electrodes, thereby driving the driven element in contact with the vibrating element along the axial direction. When the oscillating voltage signals applied to the first and second electrodes are in phase, a first mode of vibration based on the bending mode is generated in the vibrating element; when the oscillating voltage signals applied to the first and second electrodes are in opposite phase, a second mode of vibration based on the expansion / contraction mode is generated in the vibrating element, wherein the controller is used to control the speed of the driven element by controlling the phase difference between the voltage signals applied to the first electrode and the voltage signals applied to the second electrode. Another aspect of the invention provides a small boost circuit for providing a drive voltage for a piezoelectric actuator.

The application relates to a material discharging machine and belongs to the technical field of material discharging. The machine comprises a conveying channel, a receiving channel, a receiving table and a pushing mechanism. The receiving table is used for continuously placing workpieces and discharging materials. The receiving channel is arranged on one side of the receiving table and is used for receiving input workpieces. The receiving channel forms multiple rows of workpieces at a time, and each row contains only one workpiece. The conveying channel continuously sends workpieces to the receiving channel. The receiving table is provided with a blocking assembly which can operate and limit the conveying of the workpieces at the end of the conveying channel. The pushing mechanism is installed on the receiving table and continuously pushes the workpieces in the receiving channel forward. The pushing mechanism comprises a pushing driving element, a pushing block and a protection block. The pushing block is driven by the pushing driving element to push the workpieces in the receiving channel forward. The protection block is slidably installed on the receiving table. The protection block is located on the front side of the conveying channel and abuts against the frontmost row of workpieces. The sliding direction of the protection block is consistent with the pushing direction of the pushing driving element. The application has the effect of automatically discharging ring materials.

The application relates to the field of radar antennas and provides a load-assisted adjusting type radar antenna pedestal, which comprises a rotating disc, a pitching support arm connected with the rotating disc and used for connecting a radar antenna, a lifting screw rod connected with the pitching support arm and used for adjusting the angle of the pitching support arm, a lifting driving system installed on the rotating disc and connected with the lifting screw rod and used for driving the lifting screw rod to move, and a driving element installed between the rotating disc and the radar antenna and used for adjusting the angle of the radar antenna. In use, the driving force of the antenna during lifting can be effectively reduced under the condition that the height of the mobile transportation and the working height of the antenna are met, and the position of the load center of gravity can be adjusted at different working angles of the antenna.

The driving element plays the role of driving the passive element (4) relative to the active element (1). The active element (1) comprises a resonator (2), an vibration excitation means (23), and at least one arm (21), the arm (21) extending in the arm direction (21a) and having a contact element (31) at its outer end that is movable by the vibrational motion of the arm (21) in order to drive the passive element (4). The arm (21) has a contact element (31) at its outer end that drives the contact area (41) of the passive element (4). At least one of the following conditions is met: the contact element (31) includes an insert (80) made of a material different from the material of the resonator (2), particularly a material harder than the material of the resonator (2); the first wear suppression element (83) is placed on the contact element (31) and the second wear suppression element (84) is placed on the passive element (4) in the contact area (41); and the passive element (4) is made of a wear suppression material.