171results about How to "No mechanical friction" patented technology

The invention discloses a flexible micro-positioning stage with two degrees of freedom, the design of the flexible micro-positioning stage with two degrees of freedom comprises a flexible mechanism and an integral structure, two piezoelectric ceramic drivers are adopted in the structure, the tail part of each driver is connected with a base through a bolt, and the top end of each driver is connected with a spherical joint through a thread, thereby realizing Hertz contact. The flexible mechanism of the positioning stage mainly comprises three parts of the base, flexible branched chains with entirely consistent structures and a supporting movable platform thereof. Two displacement sensors are used for measuring actual output of the movable platform and respectively fixed between the base and the movable platform through an L-shaped support and a Z-shaped support. The flexible micro-positioning stage is characterized by high resolution and fast dynamic response speed, and can be taken as an auxiliary positioning platform of a nano-imprint lithography positioning system for realizing micro-feeding and precise positioning.

The invention discloses a flexible hinge amplification-based piezoelectric microgripper, which comprises a substrate, a rack, a piezoelectric stack driver, a pre-tightening screw, a motion transmission mechanism, a pair of clamping arms and a chuck; the deformation of the piezoelectric stack driver is converted into the displacement of the chuck by the motion transmission mechanism; the rack is provided with two pillars, and the piezoelectric stack driver is located between the two pillars; the motion transmission mechanism comprises a pair of double-rocker mechanisms and a pair of lever support arms; one end of an active rocker of each double-rocker mechanism is hinged with the corresponding pillar, and the other end of the active rocker is hinged with a corresponding connecting rod; each active rocker is provided with an extension section; the extension sections of the active rockers lean against the piezoelectric stack driver; the deformation of the piezoelectric stack driver serves as the driving force of each double-rocker mechanism; a position detection strain gage is adhered to the extension section of the corresponding active rocker; each clamping arm is provided with a clamping force detection strain gage. The flexible hinge amplification-based piezoelectric microgripper disclosed by the invention has the advantages that not only can the large stroke of the tail end of the microgripper be realized but also the clamping force detection and the position detection of the tail end of the microgripper can be integrated.

The invention discloses a two-degree of freedom precise positioning work table, which comprises a base, a moving platform, a rigid support which is connected with the bottom of the base, and four flexible branched chains which are connected between the moving platform and the base, wherein each flexible branched chain comprises a moving block and three groups of flexible plate spring structures; each flexible plate spring structure consists of two '-'-shaped flexible plate springs; a first group and a second group of the flexible plate spring structures are respectively positioned at the left side and the right side of the moving block; the lower ends of the two '-'-shaped flexible plate springs of a third group of the flexible plate spring structures are connected with the side wall of the upper end of the moving block, and the upper ends thereof are connected with the side wall of the moving platform; four piezoelectric ceramics driving devices are respectively horizontally arranged; a ball-shaped joint of each driving device is supported on the side wall of the lower end of the moving block; and conducting strips of two position sensors are respectively connected with the upper plane of the rigid support and the lower plane of the moving platform. The positioning work table can be taken as an auxiliary positioning platform of a nanometer embossing photoetching positioning system to realize the microscale feeding and the precise positioning.

A piezoelectric clamping micromanipulator with flexible drive and amplification and adjustable range is composed of microactuator, flexible multiplying mechanism, size pre-regulator, and clamping micromanipulator. Its advantages are compact structure, high reliability, and low non-linear error.

Disclosed is a parallel robot set to assemble diminutive machine. The robot comprises two same three-dimensional parallel frames which are in series. The parallel frame has three active links that comprise two Huke gemels and a micro displacement amplifier. The computer control system drives the displacement output of the piezoelectricity equipment. The undersides of the three active links are connected with the middle plate, and another side is connected with the work plate in a parallel frame group.In another group, the undersides of the three active links are connected with the underpan, and another side is connected with the middle plate. The middle plate is hung under the underpan. The two fingers of the robot are set on the work plate and the middle plate, which can work just like the human fingers.

The invention relates to buildings, and particularly belongs to technical application of magnetic suspension in the filed of vibration prevention of an engineering structure. The invention adopts the technical proposal that: a plurality of substructures are arranged in the engineering structure, the bottom layers of the substructure are provided with an electromagnet, the lower part of the electromagnet is provided with a corresponding structural electromagnet, the electromagnet and the structural electromagnet after being powered have the same electromagnetic polarity, and the electromagnet and the structural electromagnet are connected with an electromagnetic control device with an earthquake signal receiving device. The technical application has the advantages that: because the engineering structure applied with the magnetic suspension technology fully isolates the earthquake influence, the problems of various assumptions calculated by earthquake action, mutual influence of the earthquake and the structure, and the like disappear; and the structure is not influenced by the strength, properties and the like of the earthquake.

The two-dimensional precise angle timer for the second crystal of double crystal monochromator belongs to regulating mechanism. The upper support board is connected first to the positioning board and then to the frame, one linear stepped motor with coder is positioned via the head screws to the upper support board, one other linear stepped motor with coder is fixed to the middle support board via one tensile spring assembly and the head screws, the middle support board and the lower support board are connected via two flexible hinge assemblies, the second crystal is mounted onto the regulating board via one other tensils spring assembly, and the two crystal holding boards are connected to the lower support board.

The invention discloses a turbocharger. The invention adopts a technical proposal that the turbocharger comprises a turbine rotor shaft assembly, an intermediate, a pressure housing, a diffusion plate fixedly connected with or integrally formed with the pressure housing, wherein the turbine rotor shaft assembly is at least provided with a set of permanent magnet rings matched with each other between a turbine and a compressor impeller. The permanent magnet rings comprise at least one permanent magnet dynamic ring and at least one permanent magnet static ring which are matched with each other to suspend a rotor shaft of the turbine rotor shaft assembly. The invention provides a friction-free turbocharger which uses permanent magnet rings to suspend the rotor shaft of the turbine. The turbocharger can solve the problems of susceptibility to damage, oil leakage and pollution, reduce response lags, and does not cause serious influence on the engine except for reduction in power when damaged. The turbocharger solves the problems of susceptibility to damage, oil leakage and pollution of the prior turbocharger and overcomes the drawbacks such as high price, large volume and complex structure of electromagnetic suspension bearing exhaust turbocharger.

The invention relates to a rough-fine-movement laminated workbench with laser interferometer measurement. The workbench is mainly used in a lithography system. The laminated workbench comprises a fine movement bench, a rough movement bench, a balancing block, four vibration isolators, and a measuring frame. The rough movement bench comprises a rough movement bench frame, four moving iron electromagnetic driving modules, and four air bearings. The fine movement bench is arranged at the middle of the rough movement bench frame. The system also comprises a laser interferometer measurement assembly used in position feedback between a sheet bearing stage of a six degrees of freedom (DOF) positioning device and a pedestal. The laser interferometer measurement assembly is composed of a laser source, an optical path assembly, and a laser interferometer. With the laser interferometer measurement assembly, real-time six-DOF measurement can be carried out upon the movement part of the device. The workbench provided by the invention has a simple and compact structure. The mass of the movement parts is light. A rough movement bench driving motor adopts a lengthened rectangular coil group. On a basis that movement precision is not influenced, manufacturing difficulty of a large-scale halbach magnetic steel array is avoided, and driving motor stroke is increased, such that movement precision is improved.

The present invention relates to a stamping jet type wing shape wind sail wind generator made of magnetic suspension reinforced concrete. The generator changes the inner structure of the wind sail on the base of colligating the design idea of modern aerodynamics and retaining conventional wing shape wind sail. Because the generator adopts large area and the technology principle of the stamping jet type wing shape wind sail, it increases the area of practical wind arrest for the wind generator and also greatly improves the electricity generation efficiency for single wind generator. The present invention not only adopts the structure of the stamping jet type wing shape wind sail, but also combines the modern magnetic suspension groundsill track technology, machine-electric control technology and the conventional low cost and durable reinforced concrete structure producing technics. Thereby, the whole wind generator system not only is in favor for high efficiency big power electricity generation but also has no mechanical friction, no noise, no zoology pollution and long using life. Because the main structure of the stamping jet type wing shape wind sail wind generator is entirely made of reinforced concrete, thereby it omits complex mechanical machining and reduces the producing and manufacturing cost.

A two-stage bearing using electromagnetically driven speed regulation between two stages is composed of an electromagnetically driven speed regulating mechanism and a two-stage bearing mechanism. It can increase the extreme rotation speed of whole bearing to maximum and decrease the relative rotation speed between two stages to minimum if it is used as a single-stage bearing for longer service life.

The invention discloses a symmetrical decoupling and single degree of freedom flexible operation mechanism. The symmetrical decoupling and single degree of freedom flexible operation mechanism is characterized in that the flexible operation mechanism comprises the following components connected and assembled according to design requirements: a piezoelectric ceramics driver, a spherical connector, a driving end flexible hinge, a rigid connecting block, four groups of flexible hinge combinations, two flexible chains, a rigid moving platform, a rigid support frame and a base. The mechanism adopting the flexible connecting structure, the single degree of freedom flexible hinges and the piezoelectric ceramics driver driving technology has one actuation terminal, can be applied to micro/nano operation mechanical systems, and has the advantages of being high in precision, low in inertia, compact in structure, free of error accumulation, free of mechanical friction, free of clearance, convenient to process, convenient to manufacture, convenient to industrially implement and the like.

The invention discloses a piezoelectric micro-platform capable of amplifying based on a flexible hinge. The piezoelectric micro-platform comprises a frame and a carrier platform, wherein a micro-driver and an amplifying mechanism are arranged on the frame; the amplifying mechanism is a double-rocker mechanism; an extension section is arranged on one end, which is far away from a connecting rod, of a driving rocker of the double-rocker mechanism, and a free end of the extension section of the driving rocker supports the micro-driver; the driving rocker and the extension section thereof form an amplifying lever with a hinge point of the driving rocker and the frame as a pivot; an extension section is arranged on one end of the connecting rod, which is far away from the driving rocker; the carrier platform is connected to a decoupling mechanism, the decoupling mechanism is formed by at least one pair of decoupling units, and the two decoupling units are symmetrical around the center of the carrier platform; each decoupling unit is formed by a connecting arm and a pair of flexible arms, one end of each flexible arm is hinged to the frame, the other end of each flexible arm is hinged to the connecting arm, and the other end of the connecting arm is hinged to the carrier platform; the extension section of the connecting rod is hinged to any one decoupling unit. The piezoelectric micro-platform has the advantage that the driving displacement of the micro-driver can be amplified.