142results about How to "Small movement mass" patented technology

The invention discloses a wind tunnel model supporting device which comprises a movable platform, a clamping device, a first driving unit and a second driving unit, wherein the movable platform has three translational freedom degrees and at least one rotation freedom degree. The clamping device is connected with the movable platform and is used for fixing and supporting the model. The first driving unit and the second driving unit are arranged on the movable platform and used for driving the clamping device, and therefore, the clamping device obtains the freedom degrees of rotation in horizontal and transversal directions. The first driving unit comprises a first driving motor and a first rope traction mechanism. The second driving unit comprises a second driving motor and a second rope traction mechanism. The wind tunnel model supporting device with simple and reliable structure can realize six freedom degrees of the model in the wind tunnel test, effectively expand the model pitch and the roll amplitude capable of being realized by model supporting, and decrease the acceleration, the motion speed and the motion travel of the driving units through the first driving unit and second driving unit which are connected in parallel.

The invention relates to a tri-axial vibration composite experiment table and a plane static pressure type vibration transferring and decoupling device, wherein the experiment table comprises a working table top; and plane static pressure type vibration transferring and decoupling devices and vibration generators are connected in the direction of X, Y and X axes of the work table top. The plane static pressure type vibration transferring and decoupling device is characterized by consisting of a sliding block and a sliding seat via sliding connection; a sliding gap is arranged in a sliding surface; during the work, high-pressure oil is filled in the sliding gap through an oil filling channel to form a static pressure oil slick; as the static pressure oil slick has good rigidity under high pressure conditions, the sliding between the sliding block and the sliding seat is not obstructed. When a coaxial vibration generator generates high-frequency vibration and thrust, the vibration frequency and the thrust are transferred through a direction vertical to the static pressure oil slick; when a hetero-axial vibration generator generates high-frequency vibration and thrust, the decoupling is realized through the sliding between the sliding block and the sliding seat, so that the aim of combining the lossless transferring and the effective decoupling is realized to the greatest extent.

The invention belongs to the mechanical manufacture field and relates to a parallel 3-DOF drive mechanism of a spindle head. A fixed platform is provided with 3 drive moving pairs distributed according to the position of the apex of an equilateral triangle; each drive moving pair is connected with an input member bar which is driven by the drive moving pair; the other end of the input member bar is connected with a globe hinge and is connected with link blocks via the globe hinge; a movable platform is provided with 3 uniformly aligned driven moving pairs which are chutes; 3 link blocks are respectively installed in the chutes of the driven moving pairs and can move horizontally in the chutes; a spindle is arranged in the central position of the movable platform. By adopting parallel structure, the drive mechanism obviously improves the rigidity of the spindle head structure; in addition, the drive mechanism has the characteristics of having small movement mass, good dynamic property and high movement precision, moving and decoupling along the moving direction, and is suitable for independent working and combined machining in coordination with other devices.

The invention discloses an infrared Fourier spectrum detector with ultrahigh spectral resolution. An infrared light path consists of a pair of back-to-back angle mirrors, a pair of plane reflectors, a pair of obliquely-arranged reflectors, a beam splitter and a compensator; an angle mirror driving system consists of a linear motor and a linear bearing; and the angle mirrors are driven by the motor to perform linear reciprocating motion so as to generate light path difference. A reference light path and an infrared light path are in the same light path, the reference light path is positioned at the center part, and the infrared light path is positioned at the peripheral part. A reference light source adopts a frequency stabilized laser. A fore optical device is a horizontal access reflecting telescope, and a rear optical device focuses infrared interference light signals onto the infrared detector. The detector converts the interference light signals into electrical signals, the electrical signals are amplified by an amplifier and then converted into digital signals, and the interference signals are recorded by a data acquisition system according to position signals of a movable mirror so as to acquire an interference pattern. The interference pattern is subjected to Fourier transformation to acquire infrared spectrum signals.

The lifting/lowering assembly, for skid conveyors, has a ground frame (1) and a carrier frame (2) which can be elevated and depressed. A scissors system (4) is between the frames, with a center axis (43), to give a parallel movement action on the carrier frame. An eccentric lifting unit (5) with an eccentric lever (55) is at the center axis, to give the raising/lowering movements by rotation around the center axis, with running rollers (551,552) riding on running rails (510,520) at both frames. The eccentric lever has a chain drive (3). The carrier frame has a roller path, for the skid movements.

The invention discloses a parallel motion decoupling servo control platform, which comprises a pedestal, a first linear motor, a second linear motor and a motion platform, wherein the motion platform is arranged between the first linear motor and the second linear motor, a first side and a second side of the motion platform are respectively connected with a first motor rotor and a second motor rotor, and are respectively moved along a first horizontal direction and a second horizontal direction under the drive of the first motor rotor and the second motor rotor. According to the parallel motion decoupling servo control platform provided by the embodiment of the invention, by adopting a parallel structure, the parallel motion decoupling servo control platform is simple and symmetrical in structure, motion components in the first horizontal direction and the second horizontal direction can be exchanged so as to be convenient for processing and maintenance, levelness of the motion platform during motion is more easily ensured at work, and an execution result from input of a drive force electric signal to motion of the motion platform is more consistent in each motion direction so as to be beneficial for controlling precision of a track outline of planar motion.

The invention relates to a fuel injector (10) for injecting fuel into a combustion chamber of an internal combustion engine. An injection valve element (42) is actuated via pressure relief of a control space (36). Said control space (36) is loaded by a system pressure Rhosys. The control space (36) is relieved of pressure via a solenoid valve (22) of pressure-equalized configuration, the valve element (62) of which opens or closes a valve seat (80). The valve seat (80) comprises a spherical surface (86).

The invention relates to a solenoid valve. A magnetic circuit of the solenoid valve comprises a soft magnetic core (6), a magnetic ring (8) and an armature iron (9). The magnetic ring (8) is assembled inside a blind hole of a control valve body (11) in a stationary fit way, the blind hole is concentric with a control valve core, and the armature iron (9) is assembled below the control valve core. Because the inner hole of the magnetic ring (8) is concentric with the outer circumference of the armature iron (9), the concentricity of all the mobile components of the solenoid valve is ensured. The mass of the armature iron (9) is much lower than that of conventional solenoid valve armature irons, so that the response speed of the inventive solenoid valve is faster. The inventive solenoid valve can be used in electrically controlled monoblock pumps, spray nozzles of electrically controlled pumps, and high-pressure common rail oil sprayers.

The invention discloses a differential-principle-based two-degree-of-freedom parallel-connection rotating platform. According to the rotating table, a bevel gear A (1) and a bevel gear B (2) are perpendicularly installed through an L-shaped support (4), and outer teeth of the bevel gear A and outer teeth of the bevel gear B are meshed. A load is installed on a disc of the bevel gear A (1) and located at the hollow portion of an inner sleeve (9). Two driving assemblies are symmetrically installed on the two sides of a supporting assembly (5). An outer sleeve (8) and the inner sleeve (9) are installed in the middle of the supporting assembly (5). The outer sleeve (8) is connected to one end of the inner sleeve (9) in a sleeving mode. The two sleeves are provided with ball bearings. According to the rotating platform, rotation and pitching motion of the load can be achieved through a pair of bevel gear mechanisms with the perpendicular axes on the basis of the differential principle. The parallel-connection rotating plate is small in whole size and inertia, high in rotating speed and strong in load capacity and is of the hollow structure.

The invention relates to the field of high-voltage switches of power systems, in particular to a super-quick vacuum switch device. The super-quick vacuum switch device comprises two to four super-quick vacuum switch modules which are connected in series; a first operating mechanism and a second operating mechanism of each super-quick vacuum switch module are respectively positioned below a first epoxy embedded vacuum pole and a second epoxy embedded vacuum pole; a first voltage equalizing device and a second voltage equalizing device are respectively connected in parallel with the first epoxy embedded vacuum pole and the second epoxy embedded vacuum pole; a pulse current generator is connected with each of the first operating mechanism and a second operating mechanism; an isolation auxiliary power supply outputs a first direct-current voltage to provide power for a quick switch controller, and outputs a second direct-current voltage to provide charging voltage for the pulse current generator; the quick switch controller is connected with the pulse current generator; the quick switch controller is communicated with a direct-current circuit breaker control device positioned at ground potential through an optical fiber. The switch device is light in moving mass, quick in response and simple in structure, and facilitates module cascade extension.

The invention provides an exchange apparatus and method for a double-workpiece stage based on double-guide rail double-drive step scanning, belonging to the technical field of manufacture equipment for semiconductors. The exchange apparatus comprises a base station and workpiece stages located at an prealigning station and an exposure station; four Y-oriented rectilinear motion units and two X-oriented rectilinear motion units are preset on a balancing mass, and three-phase exchanging of the workpiece stages between a prealigning area and an exposure area is finished through butt joint between rectilinear motor stators of the Y-oriented rectilinear motion units and Y-oriented transitional rectilinear motion units; a first Y-oriented rectilinear motor mover 1 is fixedly connected with a first workpiece stage, a fourth Y-oriented rectilinear motor mover 1 is fixedly connected with a second workpiece stage, and the Y-oriented rectilinear motion units and the X-oriented rectilinear motion units form a double-guide rail double-drive structure at the exposure station. According to the invention, during exchanging of the workpiece stages, three phases are employed, which allows exchanging efficiency to be improved; in specific embodiments of the invention, the advantages of small inertia of motion, short time for stabilization, great structural rigidity, centroidal driving at the exposure station and the like are realized.

The invention relates to a method for handling and modernizing ropes in an elevator, which elevator comprises at least an elevator car (1) arranged to run in an elevator shaft along the guide rails (16), a counterweight (2) connected to the elevator car (1) with hoisting ropes (3) from above, a hoisting machinery with a traction sheave (5) above the elevator car (1), and compensating ropes (4) connected between the elevator car (1) and the counterweight through a compensating mechanism (8) at a lower part of the elevator shaft. The old hoisting ropes (3) and compensating ropes (4) are dismantled when the elevator car has been run to the upper part of the elevator shaft without a risk of losing the friction on the traction sheave (5).

Disclosed is a device (V) for concentrating a liquid (F) which is pumped through a concentrating apparatus (3) by means of a differential piston pump and directly impinges the differential piston (K) in an assisting manner during the conveying stroke at a residual pressure as a concentrate (FK). The differential piston of said device (V) is driven by a drive shaft (12) that actuates a linearly guided valve control member (18) of an intake and discharge valve assembly (A). The differential piston pump is embodied as a radial piston pump (R) in which eccentric attachments (13, 14) for the differential piston (K) and the valve control member (18) are disposed on the drive shaft (12), the differential piston (K) and the valve control member (18) being hinged directly to the eccentric attachments (13, 14) by means of traction and pressure couplings (S).

The present invention belongs to the field of industrial robot. The robot mechanism consists of one frame, one moving stage and three branches to connect the moving stage to the frame to form a parallel closed loop structure. Of the branches, each of two contains two single-freedom motion pairs and one ball articulation, and the third contains one single-freedom motion pair and one Hooke. The ends containing the moving stage and the frame are not collinear. The robot mechanism of the present invention combines the spatial shift and rotation and has the advantages of high rigidity, high accuracy, low motion mass high dynamic performance, very easy kinematics solution, etc.2

The invention discloses a grounding method and a grouping device. Objects (12) are conveyed in a regular rank (18) in horizontal and three clamping boards (36, 38, 40) coordinating with each other in pairs in an alternating manner are used for dividing the objects and conveying the objects towards a conveying channel laterally. Two of the clamping boards act in pairs in coordination on two longitudinal side faces of the rank (18) of the objects (12). During each moving process of the object group (24), the middle clamping board (36) coordinates with one of the two outer clamping boards (38, 40) to fix the object group (24) temporarily and to move the object group left or right laterally to the respective conveying channel.

The thread guide unit has a thread guide that is configured for feeding a thread. A belt drive is provided with a drive belt (16) at which the thread guide is secured, with the pulleys (18,20). A steering wheel and controllable drive motor (42) configured for driving two pulleys. The pulleys for the lateral guide of the drive belt are provided with a flanged wheel (44). The pulleys with rotational axes (18a,20a) is arranged relative to a solder (48) of a belt plane such that drive belt is fed in the side edge (16a) against the flanged wheels.

A structurally integrated in-situ actuation fully-displaced composite amplified piezoelectric inchworm linear platform comprises a fixed platform and movable platform tops slidably connected through two cross roller guide rails, and stopper bars are arranged below the movable platform tops. A first clamping group and a second clamping group, and a first driving group and a second driving group arearranged between the two stopper bars, and driving units make telescopic movement along the length direction of the stopper bars; each driving unit comprises a clamping arm connected with the telescopic end of the driving unit, the clamping arms release and clamp the stopper bars, and a movable gap is arranged between the adjacent clamping arms. The first clamping group, the first driving group,the second clamping group and the second driving group are sequentially controlled to make the movable platform tops walk and position in an inchworm-like manner. The platform has the advantages of compact structure, large movable table tops, integrated clamping and driving mechanism, low requirement for the machining and assembling precision of the clamping and driving mechanism, sufficient clamping and releasing, power-off clamping, fast moving speed and small moving error.

The locking mold oil tank free hydraulic locking mode injection machine comprises a static mold plate, an active mold plate, cross rod fastened to both ends of the static mold and back mold plate, quick mold displacing oil tank on the static mold plate whose sticking end connected with the active mold plate. It also comprises stepwise sleeves and end cap, No.1 pin hole, with the stepwise sleeve and end cap fastened by bolt and two nuts into free positioning locking mold set, more than one No.1 electromagnetic pins on the circumference of the stepwise sleeve composed of pin inserting to the No.1 pin hole and the coil driving the up and down movement of the pin, No.2 pin hole and two ring boss at one side, sealing tightly with grooves surrounding the cross rod, forming four compression cavity by four end caps and active mold plates, inside the active mold plate having oil through hole connecting the compression cavity with the hydraulic source, sticking plate on the active mold plate with No.2 electromagnetic pin and through holes, with the No.2 electromagnetic pin being able to pass the through hole, sticking to the pin inside the No.2 pin hole and driving the up and down movement of the coil on the pin . Free from locking mold oil tank, with increased locking mold force, it solves the sealing issue of the locking mold oil tank, with small components, low requirements for the parts, small consumption materials and moving weight, long opening stroke of the active mold plate, and strong suitability for the mold.

The invention provides a horizontal machine tool, which includes a machine base, a working slide table and a spindle device. The working slide table includes the first working slide table, the second working slide table and the third working slide table installed on the machine base; the third working slide table is set on the second working slide table, and the slider of the third working slide table is used In order to support the workpiece and move with the workpiece, the movement direction of the third working slide is roughly set vertically and moves together with the slider of the second slide; the movement direction of the second work slide is perpendicular to the third work slide The movement direction of the third working slide is set on the second working slide and moves together with the second working slide, and the moving direction of the first working slide is perpendicular to the direction of the second working slide and the third working slide direction of motion. The horizontal machine tool has small structural size, small volume, low driving power in the vertical direction, and is easy to use.