32results about How to "High normal stiffness" patented technology

The invention discloses a three-degree-of-freedom microoperation orthogonal parallel operating platform used for ultraprecise location, which realizes space three-dimensional translation ultraprecise location. The three-degree-of-freedom microoperation orthogonal parallel operating platform is provided with a static platform and a movable platform, wherein a piezoelectric ceramic driver is fixedly vertically arranged on each panel of the static platform, a drive of each piezoelectric ceramic driver is connected with the top end of a branched chain, the tail end of each branched chain is vertically connected with the movable platform, three branched chains are formed by sequentially serially connecting a flexible movable pair, a parallelogram structure, a first rotating pair and a second rotating pair according to position relationships of vertical, vertical and parallel among axial lines, the top end of each branched chain is a movable pair, the tail end of each branched chain is a second rotating pair, the three movable pairs are mutually orthogonal, and the three second rotating pairs are mutually orthogonal. According to the invention, the advantages of a parallel mechanism and a flexible movement pair are combined, a movement is generated by depending self elastic deformation, and output reaches high precision of micro level even nano level.

The invention provides an automobile pillar A display system which comprises a blind area camera, a display screen, an image processing and display output unit, and a control unit, wherein the blind area camera is arranged in a position close to a front windshield inside an automobile and is connected with the image processing and display output unit; the image processing and display output unit is arranged close to the console inside the automobile and is connected with the display screen; the control unit is arranged close to the console inside the automobile and is connected with the blindarea camera; the display screen is arranged on the inner surface inside an automobile pillar A; the area of the display screen is not greater than that of the inner surface of the pillar A; the imageprocessing and display output unit is used for outputting images acquired by using the blind area camera to the display screen. The automobile pillar A display system can be adaptive to different running states of the automobile, different adaptive images can be displayed on the pillar A, and thus relatively high driving security can be achieved; the units are compactly arranged inside the automobile, the response speed and the precision of the system can be improved, and the driving comfort can be improved.

The embodiment of the invention discloses an optical adhesive and a manufacturing method and flexible display screen thereof. The optical adhesive includes a first section and second sections disposedon both sides of the first section, the first section includes an OCA adhesive layer, and the second section includes OCA adhesive layers and support columns disposed in the OCA adhesive layers. Themanufacturing method of the optical adhesive includes the steps of defining the first section and the second sections which are located on the two sides of the first section on the surface of a provided substrate; preparing the support columns on the portions, in the second sections, of the substrate; coating the portions, in the first section and the second section, of the substrate with an OCA adhesive. The flexible display screen includes the optical adhesive. By embedding a support column in a non-bending area of the flexible display screen, the normal stiffness of the flexible display screen is improved, correspondingly the hardness of the flexible display screen is improved, and thus the flexible display screen can pass through pencil hardness and nanoindentation tests; the conventional OCA adhesive is adopted in a bending area without reinforcing the bending area, and therefore not only can the high hardness of the non-bending area be ensured, but also a good bending property ofthe flexible display screen in the bending area can be ensured.

A hitch receiver apparatus for a vehicle is provided in which a hitch receiver is disposed without being directly connected with a rear back beam, such that the hitch receiver is kept in the rear back beam when not being used, and the hitch receiver protrudes down under the rear back beam when using the function of a trailer.

The invention relates to a preparation process of a high toughness PE hollow wall twined pipe based on red mud modification. The process utilizes nano-zinc oxide and graphene for modification to improve the mechanical properties, toughness and rigidity of the pipe; nano-zinc oxide and graphene cooperate to form a continuous conductive path between systems, thus greatly improving the pipe conductivity; red mud is utilized for blending modification of a PE composite material, while the rigidity is improved, the PE pipe also has strong toughness, waste is turned into wealth, and the cost is greatly saved. Hydroxyl silicone oil can migrate on the PE surface and form a flame retardant layer to achieve flame retardant effect. Moreover, addition reaction can be carried out on the hydroxyl in themodified hydroxyl silicone oil and the epoxy group in a bisphenol A epoxy resin structure to enhance the crosslinking density and mechanical strength of the pipe. At the same time, hydroxyl silicone oil has low surface energy and endows the PE pipe with excellent waterproof performance. The preparation method is simple and scientific, the cost is low, the preparation process is environment-friendly, and has no pollution to the environment.

A coil spring of this invention includes a first end coil part with a first bearing surface facing to the first side in the axial direction, a second end coil part with a second bearing surface facing to the second side in the axial direction and a central coil part connecting the first and second end coil parts. A displacement length in the axial direction from the outer end portion until the inner end portion of the first end coil part is a thickness of a spring wire forming the coil spring so that a space between the outer end portion of the first end coil part and an inner end portion of the central coil part is zero, and a displacement length in the axial direction between the outer end portion of the first end coil part and a point away along the circumferential direction from the outer end portion toward the inner end portion of the first end coil part by a half of turn around the axial line is less than a half of the thickness of the spring wire.

The invention relates to a large-size freely combined model test device for a high ground stress underground engineering, and the device provided by the invention comprises a plurality of split mounting type counter-force jack horse devices, wherein the whole test device has a narrower upper part and a wider lower part; the side face of the whole test device is a slope; each split mounting type counter-force jack horse device comprises a top beam, a side beam and a bottom beam; flanges and high-strength bolts are used for connecting the top beam to the side beam and connecting the side beam to the bottom beam; the counter-force jack horse devices can be connected mutually or be connected to front and back counter-force beams; the upper parts of the front and back counter-force beams are connected to left and right pulling rods while the lower parts of the front and back counter-force beams are connected to a model lifting translation trailer system on the bottom beam; the top beam andthe side beam are both provided with hydraulic loading systems; and the baseboard of the device is provided with an automatic hydraulic model lifting translation trailer system, thereby being convenient and stable to move a test model in and out. The test device is flexibly assembled, is simply operated, can be used for conveniently loading and observing, is provided with the model lifting translation trailer system, and can be applied to the plane and three-dimensional geo-mechanical model test for the geotechnical engineering under the high ground stress condition.

The invention provides an off-axis reflector, and the reflector comprises a reflective surface, a back surface, a front surface, a back surface, a first side surface, and a second side surface. The reflective surface is opposite to the back surface, and the front surface is opposite to the back surface. The first side surface is opposite to the second side surface, and a first light weight hole layer is disposed between the first side surface and the second side surface. A second light weight hole layer is disposed between the front surface and the back surface. The reflector can obtain higherrigidity, and can effectively solve problems that a conventional reflector is long in processing period and is high in manufacturing cost and a long-strip off-axis reflector is low in rigidity. The invention also provides a processing method for the reflector, and the employs the modification technology for modifying the reflector. Optical processing is carried out on the surface of a modified layer, thereby improving the surface figure accuracy and surface cleanness of the reflector. The method can meet the requirements of visible light.

The invention provides a large-scale high-speed rotary equipment multi-stage part rigidity prediction method based on contact area maximization testing and adjustment. According to the method, the three parameter components of the rotor eccentricity error, the sensor measuring head offset and the sensor measuring ball radius in the circular profile measurement are considered, a three-parameter circular profile measurement model is established, and the eccentricity error can be accurately estimated; according to the multistage rotor transfer relation, the offset of the contact surface between the rotors at all stages is obtained, the sectional area of the contact surface is calculated, an objective function of tensile rigidity is obtained according to a tensile rigidity formula, and multistage rotor assembly rigidity prediction of the aero-engine is achieved.

The invention relates to a secondary reflector substructure device for tower-type photo-thermal power generation. The device comprises a substructure steel structure assembly (1), a secondary reflector assembly (2) and a spring tensioning and limiting connecting assembly (3), and the secondary reflector assembly (2) is provided with the substructure steel structure assembly (1). The secondary structure steel structure assembly (1) and the secondary reflector assembly (2) are connected through the spring tensioning and limiting connecting assembly (3). A secondary reflector can realize free mirror surface extension under a high-temperature working condition and high rigidity under a strong wind working condition. In addition, the processing, manufacturing, assembling and construction efficiencies are improved, the process difficulty is reduced, and the effects of improving the surface precision of a secondary reflector substructure and reducing the cost are achieved.

The invention discloses a three-degree-of-freedom robot neck device and a working method, and belongs to the technical field of robot neck control. The invention provides a parallel robot neck device with high degree of freedom, high rigidity and high flexibility and a working method. The three-degree-of-freedom robot neck device is characterized in that a motor is fixed to a lower platform; a driving shaft of the motor is fixed to one end of a first connecting rod; the other end of the first connecting rod is rotationally connected with one end of a second connecting rod; the other end of the second connecting rod is rotationally connected with an upper platform; a control system is in two-way connection with a transmission set; and a robot head is arranged on the upper platform. The working method of the three-degree-of-freedom robot neck device comprises the following steps that current angle information of the transmission set is read in real time; a processor identifies the current state of the robot head; and the motor correspondingly rotates according to a target driving instruction, so that the robot head acts along with the action of the upper platform till the current angle information is consistent with target angle information. The method is mainly used for controlling the robot head.

The invention discloses an experimental testing device and method for the vibration contact characteristics of a blade damper system of a gas turbine. The device comprises an installation support; a fixed nipper in which a wheel flange is detachably mounted, wherein the fixed nipper is provided with a load applying device, piezoelectric force sensors are fixedly installed on the installation support, each piezoelectric force sensor is connected with a simulation piece clamp through a signal separator, and a blade root simulation piece is fixedly installed on the simulation piece clamp; a friction damper; a centrifugal force loading device; a laser vibration meter; an excitation probe which is used for applying step sinusoidal signals in different frequency ranges to the gas turbine blades; an electromagnetic vibration exciter; an eddy current displacement sensor which is used for measuring a vibration response signal; a multi-channel data acquisition system; a signal generator and a power amplifier. According to the invention, the accuracy and reliability of the gas turbine blade damper system vibration contact characteristic experiment test can be improved.

The invention relates to a manufacturing method of a novel multi-manifold joint with an isosceles triangle-shaped section, and belongs to the technical field of building steel structures. The method comprises the following steps of 1, bending a steel plate into a steel pipe with an isosceles triangle-shaped cross section; 2, taking a solid steel bar at one end, and polishing two end surfaces of the solid steel bar; 3, ensuring that a plurality of inserting plates are taken and annularly distributed at equal intervals with the solid steel bar as the center to be subjected to equal-strength groove welding with the solid steel bar. 4, between every two adjacent inserting plates, welding the steel pipe to the inserting plates in an opposite-side full-length mode, and finally polishing weld joints to be flat. The method has the advantages of simple structure, good stability and long service life. The problem that a space assembly type steel structure connecting joint is low in rigidity is solved.