33results about How to "Large driving stroke" patented technology

A two-dimensional fast deflection table integrating a sensing unit and a constraint element, and a method. The deflection table comprises X-axis and Y-axis angular displacement sensing measurement devices (3, 4) which are located between a micro-angle pendulum platform 1 and a base 2, a double-axis flexible hinge 10 being arranged on the lower surface of the micro-angle swinging platform; and the deflection table also comprises four linear voice coil motors (6, 7, 8, 9); the X-axis and Y-axis angular displacement sensing measurement devices (3, 4) each comprise a pair of flexible metal beams (3-1, 3-2) projecting from two opposite sides of a rigid support 5 and mass blocks (3-3, 3-4) which are fixedly connected to the tail ends of the flexible metal beams (3-1, 3-2); a strain gauge is attached to upper and lower surfaces near the root of each flexible metal beam (3-1, 3-2); the first and third voice coil motors (6, 7) are oppositely arranged using the same specifications and form a first actuator set; the second and fourth voice coil motors (8, 9) are oppositely arranged using the same specifications and are perpendicular to the first actuator set in a cross arrangement; With the present invention, the constraining rigidity of the deflection table is increased by means of the flexible metal beams; meanwhile, the deflection table serves as a sensing unit for performing real-time measurement of double-axis deflection angles in a strain feedback mode.

The invention discloses a positioning mechanism and a welding fixture, wherein the positioning mechanism includes a mounting column, a linear driving structure, an extension rod, a positioning structure and a guiding structure, wherein the mounting column extends along a first direction, and the fixed end of the linear driving device is arranged on The installation column, the movable end of the linear drive device has a movable stroke along the first direction, the extension rod is extended along the first direction, one end of the extension rod is arranged on the movable end, the positioning structure is arranged on the other end of the extension rod, and the guide structure is arranged on the other end of the extension rod. Between the positioning structure and the mounting column, the linear drive device is driven and connected to the positioning structure through an extension rod, which increases the driving stroke of the linear drive structure, which is conducive to setting a larger linear drive device, thereby providing greater driving force. The guide structure prevents the movable end of the linear drive from shaking after being stretched out, thereby improving the positioning accuracy of the positioning mechanism.

The invention is a conjugate imaging-based multi-deformable mirror sires combined wave front corrector, comprising at least two same wave front correctors and corresponding 4f optical system, where the adjacent wave front correctors are interconnected by the 4f optical system to compose a combined wave front corrector and make each wave front corrector located in the optical conjugate imaging position, i.e. each wave front corrector is placed on the front focal surface and rear focal surface of the 4f optical system in order, the wave front corrector can be a deformable mirror using piezoelectric or electrostrictive ceramic as driver and separately driving continuous mirror surface, or a double-voltage deformable mirror, a deformable mirror made by microelectronic mechanical system (MEMS)technique, etc; the 4f optical system adopts a lens-composed refracting system or a reflecting system composed of off-axis parabolic mirror. And the invention has simple structure, high light energyutilization ratio, and can effectively increase wave front correction travel and provides an easy-to-implement method for improving the wave front correcting effect of the self-adapting optical system by using the existing deformable mirror manufacturing technique.

The invention discloses a profile measuring device and method for multi-cone section deep hole parts. The measuring device includes a cavity, an axial feed mechanism, an axial detection mechanism, an aperture measurement mechanism and a driving motor. The invention adopts a cylindrical integrated measuring structure, and the key structures are stored in the cavity formed by the left and right end covers and the casing. The overall structure of the measuring device is simple and compact, and the volume is small. The present invention adopts the mode that the lead screw nut auxiliary driving device cooperates with the spline shaft driving device, the whole structure has good rigidity and the driving stroke is large. The axial detection device is used to record and feed back the change of the axial position in time, and the axial feeding accuracy is high. The aperture measurement mechanism adopted in the present invention has two degrees of freedom in the axial direction and in the circumferential direction, combined with the axial movement mechanism and the axial detection mechanism, the position adjustment of the primary measurement device is realized, and each cone section of the deep hole part is obtained. The taper and the roundness, diameter and other geometric quantities of each depth in the aperture.

An arc-shaped comb structure driven by micro-mechanical electrostatics, which relates to the technical field of micro-mechanical electrostatic drives; it includes n groups of identical arc-shaped comb groups; n groups of arc-shaped comb groups are evenly distributed on the outer edge of an external arc-shaped device ;Each group of arc-shaped combs includes static combs and moving combs; the static combs and moving combs are F-shaped hammer-like structures that are staggered; driven by external static electricity; the moving combs are external arc-shaped devices The center is the center of the circle, and moves closer or farther away from the static comb teeth; when the static comb teeth cooperate with the movable comb teeth, the first movable electrode extends between the first fixed electrode and the second fixed electrode; the second movable electrode is located at the The radial outer side of the second fixed electrode; the present invention realizes the improvement of the mechanical movement displacement under the same vacuum environment and driving voltage as the traditional technology, and does not increase the difficulty of the process.

A micromechanical electrostatically driven linear comb structure, which relates to the technical field of micromechanical electrostatic drive; it includes n groups of identical linear comb groups; n groups of linear comb groups are evenly distributed horizontally on the horizontal side walls of external devices ; Each set of linear combs includes static combs and moving combs; the static combs and moving combs are an E-shaped structure that is staggered; driven by external static electricity; the moving combs are along the horizontal side wall of the external device, The linear motion of approaching or moving away from the static comb teeth; when the static comb teeth cooperate with the moving comb teeth, the first moving electrode extends between the first fixed electrode and the second fixed electrode; the second moving electrode extends into the second fixed electrode and the third fixed electrode; the third moving electrode is arranged on the outside between the third fixed electrodes; the present invention achieves a larger driving stroke under the same vacuum environment and driving voltage as the traditional technology, and does not increase the difficulty of the process .

The invention discloses a magnetic latching type solenoid control microwave switch driving system, which mainly comprises an upper coil assembly, a lower coil assembly, a magnetic steel array group, an iron core group and a yoke group, wherein the upper coil assembly and the lower coil assembly consist of upper and lower groups of coils, of which the parameters are the same, and the encircling direction of the current of the upper and lower groups of coils are opposite; the magnetic steel array group comprises a plurality of pieces of block-type magnetic steel which are arranged along the circumference and homopolarly centripetal; the iron core group consists of a transmission shaft and an iron core relatively fixed with the transmission shaft; the magnetic steel array group encircles the iron core; the iron core group passes through the axes of magnetic stele arrays; and yokes covers a whole mechanism. Under the condition that the coils are not powered on, the driving system can keep an upper stable state and a lower stable state of the iron core group; when a pulse signal passes through the lower coils, the iron core group moves upwards from the lower state; when the pulse signal passes through the upper coils, the iron core group moves downwards from the upper state; and the travel change of the iron core group reflects switch on and switch off of a travel control microwave switch of an execution mechanism. The magnetic latching type solenoid control microwave switch driving system has the characteristics of large travel, energy saving, compact structure, small volume and the like.

The invention discloses a 2-degree of freedom piezoelectric driver of a bent piezoelectric vibrator and a motivation method of realizing 2-degree of freedom movement by using the driver, and belongs to the technical field of the piezoelectric driving. The problem that the existing 2-degree of freedom piezoelectric driving device is complicated in structure, high in cost and small in travel is solved. The driver comprises a base, a piezoelectric vibrator and a mover; the bent piezoelectric ceramic is divided into two parts: the first set of bent piezoelectric ceramic group and the second set of bent piezoelectric group; when two sets of piezoelectric ceramic exert a voltage motivation signal, the piezoelectric vibrator can realize the bending movement of 2-degree of freedom. By changing the voltage motivation signal, the bending direction of the piezoelectric vibrator can be controlled; the friction force is used as the driving force and the piezoelectric vibrator is used as the stator so as to drive the mover to realize the 2-degree of freedom movement. The 2-degree of freedom piezoelectric driver is mainly applied to the super-precise driving, positioning, processing and like field.