63results about How to "Simple and symmetrical structure" patented technology

The invention relates to a free 6-UPS three-linkage parallel robot, belonging to the robot and mechanical producing area. The invention is characterized in that: three couples of straight driving branches are arranged in symmetry right triangle between the upper platform (1) and the base (2), while each couple comprises: two same SPU synchronous flexible driving branch while the upper end of each branch has a ball couple, the middle has a moving couple and the lower end has a universal couple connected to the base (2); the moving couple is formed by a mechanical or hydraulic synchronous flexible driver; the distance between two ball couples of each couple of straight driving branch is the same as the distance between two universal couple vertical axles (9). The invention is characterized in less freedom, easy control, large working space, simple structure and high accuracy. The invention can be used in large radio telescope, three-dimensional measure and sensor, etc.

The invention provides a despun capture integrated device. The despun capture integrated device comprises a capture mechanism, a coupling and a despun mechanism, and the despun mechanism comprises anelectric generating machine mounted on a servicing spacecraft; the capture mechanism is connected with the despun mechanism through the coupling, after a target is captured by the capture mechanism, the despun mechanism is driven by rotation of the target to generate electricity, and thus rotation of the target is eliminated. According to the despun capture integrated device, the structure is compact, automatic centering is achieved, clamping is reliable, energy consumption is low, applicability of interfaces is wide, the despun capture integrated device can be used for targets in high speed self-spin or plane-spin states and the targets which the interface of a rotary body shape is located on a rotary shaft, continuous capturing and releasing of the targets can be achieved, stability of the targets and accuracy of gesture are guaranteed, and the despun capture integrated device has great application value in space operation tasks such as repairing, auxiliary on-orbit and off orbit offailed satellites.

The invention provides a voltage dynamic balance management system of a power lithium battery pack, which relates to a charging and discharging balancing circuit of a series power battery pack. The voltage dynamic balance management system comprises a microprocessor, Hall sensor modules, channel selecting modules, a switch driving circuit module and a DC/DC (Direct Current/Direct Current) transformer, wherein the microprocessor is used for gating a single battery in the battery pack by a first channel selecting module; an input end of the DC/DC transformer is connected with two ends of the battery pack; an output end of the DC/DC transformer is connected with two ends of the single battery by the switch driving circuit module and the switch driving circuit module; an input end of a first Hall sensor module is connected with a charging current input end and a discharging current output end of a charging and discharging switch; an output end of the first Hall sensor module is connected with the microprocessor; an input end of a second Hall sensor module is connected with a balancing charging current output end of the switch driving circuit module; an output end of the second Hall sensor module is connected with an input port of the microprocessor; an input end of the switch driving circuit module is connected with an output end of a second channel selecting module; and an output end of the circuit driving circuit module is connected with two ends of the single battery of the battery pack.

The invention provides a parallel multi-output micro-transmission. A transmission mechanism of the micro-transmission is a gear mechanism that is based on the spatial curve engaging principle. The micro-transmission can realize the outputting of many shafts simultaneously; and furthermore, an included angle between the central line of an input shaft and the central line of each output shaft can be any angle. The spatial curve engaging gear mechanism consists of driving wheels and driven wheels; a plurality of driving wheels are arranged on the input shaft; each output shaft is provided with one driven wheel; the output shafts are symmetrically arranged at two sides of the input shaft; a motor is connected with the input shaft and drives the input shaft and the driving wheels on the input shaft to rotate; and the driving wheels drive the driven wheels to rotate, thereby realizing the outputting of many shafts simultaneously. The parallel multi-output micro-transmission is a primary micro-transmission, is characterized in that the structure is simple, a box body is simple, the speed ratio is large, the layout is compact, the application is flexible, the weight is extremely light, the cost is low, the multi-shaft output is realized, and the like, has wide application prospect in the application occasions with the conditions of flexible operation, multi-direction output, multiple transmission ratios and the like, and is convenient for manufacturing abundant and flexible products.

The invention provides an electromagnetic metasurface. The electromagnetic metasurface comprises a plurality of encoding sub-modules, each encoding sub-module comprises a first dielectric plate, a second dielectric plate, a metal reflection floor, a third dielectric plate and an air pressure switch which are sequentially arranged in the preset direction, a basic unit empty groove and a vertical through hole are formed in each second dielectric plate, and the bottom of each basic unit empty groove is communicated with the corresponding vertical through hole; a liquid metal liquid storage tank is arranged in the third dielectric plate and is communicated with the vertical through hole in the second dielectric plate; the metal reflection floor is composed of a metal patch with a hole, and anopening is formed in the center of the metal reflection floor and communicated with the vertical through hole; and the air pressure switch is arranged at the bottom of the third dielectric plate and is communicated with the liquid metal liquid storage tank in the third dielectric plate.

The invention relates to an investment casting technology, in particular to a method for evaluating temperature field distribution in an orientated solidification process. The method comprises the following steps of: designing a mold of the same platform size, symmetrically assembling wax patterns pressed by using the mold in a module by adopting a specific crystallographic orientated seed crystal, and casting a specifically-orientated mono-crystal casting; and qualitatively evaluating the temperature field distribution situation through a rule that the temperature field distribution is more uniform when corresponding branched areas on the left and right sides of a platform are more symmetrical. According to the method, the temperature field distribution situation in the orientated solidification process can be represented qualitatively under the condition of not measuring the temperature field distribution in the orientated solidification process by using a temperature measuring instrument. Due to the adoption of the method, the problem of difficulty in accurately evaluating the temperature field distribution in the orientated solidification process can be solved, and bases are provided for qualitative judgment of the temperature field distribution situation in the orientated solidification process in practical production.

The invention provides a support frame mechanism for a rigid and flexible parallel serial condenser rotating at two degrees of freedom. The support frame mechanism comprises a condenser, a movable platform, a rack, a passive rod, a first winch, a second winch, a third winch, a first steel wire rope, a second steel wire rope and a third steel wire rope. The moving platform is provided with a first rope fastener, a second rope fastener and a third rope fastener, the three winches are respectively connected with the three rope fasteners on the movable platform through the three steel wire ropes, the passive rod comprises a Hooke joint and a support rod, one end of the support rod is connected to the center of the movable platform through the Hooke joint, and the other end of the support rod is fixedly connected onto the rack. By driving the three winches to extend and retract the three steel wire ropes connected onto the movable platform, the condenser rotates at two degrees of freedom, so that the motion of tracking the sun is completed. The mechanism is simple in structure, high in reliability, symmetric, and low in production cost, and can be modularized.

The invention provides a reconfigurable electromagnetic metamaterial. The metamaterial comprises a plurality of electromagnetic metamaterial units, each electromagnetic metamaterial unit comprises a first dielectric plate, a second dielectric plate, a metal reflection floor, a third dielectric plate and an air pressure switch which are sequentially arranged in the preset direction, a stepped emptygroove and a vertical through hole are formed in each second dielectric plate, and the bottom of each stepped empty groove is communicated with the corresponding vertical through hole; a liquid metalliquid storage tank is arranged in the third dielectric plate and is communicated with the vertical through hole in the second dielectric plate; the metal reflection floor is composed of a metal patch with a hole, and an opening is formed in the center of the metal reflection floor and communicated with the vertical through hole; and the air pressure switch is arranged at the bottom of the thirddielectric plate and is communicated with the liquid metal liquid storage tank in the third dielectric plate.

The invention provides a device and a method for carrying out acidolysis by adopting an I-type glass tube. The device comprises the I-type glass tube for providing an acidolysis reaction space, a magnet, a magnetic stirrer, a sample boat for storing samples, a connecting joint arranged at a top tube opening of the I-type glass tube and a magnetic stirrer, wherein an acidolysis reaction solution iscontained in the I-shaped glass tube, the magnet is located on one side of the outer wall of the I-shaped glass tube, the magnetic stirrer is located on one side of the inner wall of the I-shaped glass tube, and the magnet and the magnetic stirrer are attracted and fixedly arranged on the I-shaped glass tube. The sample boat is placed in the I-shaped glass tube in a manner that an opening is upward, and the sample boat is supported on the magnetic stirrer; by adopting a symmetrical structure, on the basis of ensuring the quality of experimental data, the operation is simpler and more convenient, the experimental process is greatly simplified, and the risk of experimental failure is reduced.

The invention discloses a high-speed precision pneumatic main shaft. In a turbine shaft (16), a back end bearing (1) and a middle bearing (5) are arranged in a box body (11); the turbine shaft (16) and a turbine (22) are integrated, and the outer diameter of the turbine (22) is not larger than the outer diameter of the turbine shaft (16); a nozzle driven by air current impact corresponding to the turbine (22) is arranged in the box body (11); air outlets (27) are formed at the two ends of the turbine chamber of the turbine (22); in an executing mechanism, a front end bearing (8) is arranged in the box body (11); the turbine shaft (16) is connected with the executing mechanism through an integral micro flexible connecting mechanism. The high-speed precision pneumatic micro main shaft has the advantages of novel and reasonable design, simple and compact structure, small size, simple manufacturing process, high rotating speed and small jumping errors, can be taken as a micro main shaft of a micro machine tool for performing fine cutting and fine grinding as well as a micro main shaft of other electromechanical or manual tool machines revolving at high speeds, ultrahigh speeds and high accuracies, and the like.

The present invention discloses a helical rotor of high-concentration hydrapulper. Said helical rotor includes the following several portions: rotor core, helical blades, toothed blades and base plate. The upper portion of said rotor core is made into the form of circular cylinder and its tower portion is made into the form of cone, the bottom portion of said cone body is connected with the described base plate, the circular cylinder body portion of said rotor core is equipped with three helical blades, the toothed blades are placed on the base plate and connected with the helical blades respectively. Besides, said invention also provides the working principle of said hydrapulper and its operation method.

The invention discloses a photonic crystal waveguide sextupole split mode interference FANO resonant structure. The structure comprises a two-dimensional photonic crystal linetype waveguide composed of a plurality of dielectric cylinders with the refractive index, the two-dimensional photonic crystal linetype waveguide comprises two waveguide ports and one point defect resonant cavity, wherein thetwo waveguide ports are arranged on the two sides of the point defect resonant cavity respectively. The point defect resonant cavity comprises four dielectric cylinders and one point defect dielectric cylinder with the cross section long side being perpendicular to a waveguide axis and the length-width ratio being 1.43-1.45. Two dielectric cylinders are symmetrically arranged on the two sides ofthe point defect dielectric cylinder respectively, and the centers of the four dielectric cylinders and the point defect dielectric cylinder are distributed and arranged at equal intervals. The structure provided by the invention is compact, bright mode and dark mode of Fano resonance can be conveniently controlled, and Fano resonance is easy to achieve integration with other photonic crystal devices.

The invention discloses a dual-frequency high-power over-mode waveguide bend, and belongs to the technical fields of microwave and millimeter wave. The bend comprises a 90-degree bend oval waveguide,and an input end transitional structure and an output end transitional structure arranged at the two ends; and the waveguide bend inner wall is in smooth transition. By virtue of mode selection characteristic, different working modes can be selected in different frequency bands to realize dual-frequency operation; and the dual-frequency high-power over-mode waveguide bend has the advantages of simple and symmetrical structure, convenience in processing and assembling, high broadband efficiency, extremely wide bandwidth particularly in a TE<11> mode, large cross section dimension, high power capacity and the like.

The invention belongs to the technical field of robots, and particularly relates to a swinging and translation plane mechanism. The swinging and translation plane mechanism comprises a base, a first swinging device, a telescopic device, a second swinging device and a movable platform, wherein the movable platform is connected with the base through the first swinging device, the telescopic device and the second swinging device correspondingly, the first swinging device and the second swinging device are both hinged with the movable platform, the end of the telescopic device is fixedly connectedwith the base, and the first swinging device and the second swinging device are arranged on two sides of the telescopic device respectively. According to the swinging and translation plane mechanism,only a few motors are needed, a simpler and symmetrical structure is used to finish translation, the prior art is improved through innovative improvement of the structure, the same effect is achievedby reducing the number of parts, the advantage of fast platform speed is embodied while the structure is simple, and the working efficiency is improved. In addition, the invention provides a workingmethod of the swinging and translational plane mechanism, so that the working stability and efficiency of the mechanism are improved.

The invention discloses a micro spindle for fine machining. A turbine 19 is arranged in the middle of a spindle rotor 16 and is driven by a high-speed airflow provided by a turbine nozzle 18, the spindle rotor 16 adopts a front-end porous static pressure gas radial bearing 13 and a rear-end porous static pressure gas radial bearing 14 radial support, a baffle 21 is arranged at the rear end of the spindle rotor 16, a front-end porous static pressure gas thrust bearing 3, a rear-end porous static pressure gas thrust bearing 2 axial support, a rear-end bearing supporting part 20, the turbine nozzle 18 and a front-end bearing supporting part 17 are sequentially installed in a box body 1 and are fixed through an installing plate 11, and a micro cutter 15 is clamped at the front end of the spindle rotor 16 through a thermal expansion and cold contraction effect. The micro spindle is reasonable in design, simple in structure, small in size, convenient to manufacture, high in rotating speed and small in bounce error, can serve as the micro spindle for a micro machine tool for fine machining and can be also used as the micro spindle for other high-speed high-precision micro electro mechanical devices or manual tool machines and the like.

The invention provides an 8-shaped like planar broadband circularly polarized antenna. The planar broadband circularly polarized antenna comprises a dielectric substrate, a top-layer radiation unit and a bottom-layer radiation unit, wherein the top-layer radiation unit is arranged on an upper surface of the dielectric substrate; the bottom-layer radiation unit is arranged on a lower surface of the dielectric substrate; the top-layer radiation unit and the bottom-layer radiation unit are the same in sizes and structures; the top-layer radiation unit consists of a top-layer metal strip radiation unit and a top-layer metal half-wave dipole unit which are connected with each other; the bottom-layer radiation unit consists of a bottom-layer metal strip radiation unit and a bottom-layer metal half-wave dipole unit which are connected with each other; and the top-layer radiation unit and the bottom-layer radiation unit are arranged in an inversesymmetry way like the number 8 relative to the dielectric substrate. The structure is suitable for the broadband circularly polarized antenna. Through adoption of the 8-shaped like planar broadband circularly polarized antenna, the antenna structure is symmetric and simple; convenientfeed is achieved; and broadband wide-beam circularly polarized radiation can be realized. Moreover, the antenna is small in size, and low in manufacturing cost.