35results about How to "Optimize form factor" patented technology

The present invention relates to a display element for a personal display system, a personal display, and methods and uses. The display element comprises a light guide (21) capable of guiding light by total internal reflection, a diffractive in-coupling grating (22) and a diffractive out-coupling grating (25). The in-coupling grating is adapted to couple light directed thereto to the light guide to allow the light to propagate to the out-coupling grating. According to the invention, the incoupling grating is adapted to couple light into at least the light guide as at least two diffracted wavefronts, and the display element further comprises at least two different exit pupil expansion gratings (23, 24) adapted along the Different paths direct the wavefronts to the outcoupling gratings respectively. The invention allows reducing the size of diffractive display elements.

The invention provides a grinding device for a steel rail high-speed grinding train. The grinding device includes a grinding trolley, a rotary bracket arranged on the grinding trolley and a grinding wheel group. Guiding wheels are arranged on the lower portion of the grinding trolley. Automatic rotary devices are arranged at two ends of the rotary bracket. Automatic rotary devices are connected with a grinding trolley frame through a vertical cylinder. One end of a guiding column which is used for guiding up and down of the rotary bracket is arranged on an upper crossbeam of the grinding trolley frame, and the other end is arranged on a lower crossbeam of the grinding trolley frame. The grinding device for the steel rail high-speed grinding train has the advantages of being high in grinding efficiency and enabling the steel rail high-speed grinding train to be utilized in a railway operation system; opening skylight points which are additionally opened is unnecessary and economic benefits of railway transportation are effectively improved.

The invention discloses a hexagon head bolt hot heading forming die. A step hole with the wide upper portion and the narrow lower portion is formed in a forming die fixing base from top to bottom in apenetration manner. The step hole is internally provided with a T-shaped combined forming die. A horizontal arm of the T-shaped combined forming die sleeves the step position of the step hole. A vertical arm of the T-shaped combined forming die extends out of the lower surface of the forming die fixing base. The T-shaped combined forming die is provided with a T-shaped blind hole from top to bottom. A piece pushing device is arranged in the T-shaped blind hole. The upper surface of the T-shaped combined forming die is provided with a cushion plate, and the cushion plate is arranged at the upper portion of the step hole. The lower end of the T-shaped blind hole in the T-shaped combined forming die is provided with a hexagon head forming die. A lower die comprises a lower die base and a lower die fixing base fixed to the lower die base, a lower die core is sleeved with the lower die fixing base, and a second straight hole is coaxially formed in the lower die core and the step hole and internally provided with a lower ejection rod. The lower ejection rod is driven by a drive mechanism to move up and down.

The invention discloses a telephoto lens, comprising a lens frame and an end cover; the lens frame is internally provided with a meniscus convex lens, a double concave lens, a first meniscus concave lens, a double convex lens and a second meniscus concave lens in sequence from an object-near side to an object-far side; the contact surfaces of the first meniscus concave lens and the double convex lens are glued; a spacer is arranged between the double concave lens and the first meniscus concave lens; and a spacer is arranged between the double convex lens and the second meniscus concave lens. As the telephoto lens adopts the structure, the ray longitude has the characteristics of small viewing holes, no vignetting in the viewing field, large collecting amount of daylight, no defocusing andgood night viewing effect; and the focus reaches 12 mm, and the resolution is more than million pixels. The lens designed according to the proposal adopts an optical path with an included angle of zero degree between the principal ray and the optical axis, therefore, the optical distortion is small and the utilization rate of energy is high; and the lens is designed to be one third circle, has high resolution and excellent night viewing effect.

An embodiment of the present invention provides a method for manufacturing a fairing. The method includes: using a first composite material to form a fairing body; using a second composite material to form a cowl; combining the second composite material with the first The materials are different; the fairing body and the cowl are assembled together to form a fairing. In the solution of the present invention, the fairing adopts the separate molding of the fairing body and the hood, which effectively releases the internal stress of the molding, optimizes the outer dimensions of the fairing, and improves its overall assembly accuracy.

The invention belongs to the technical field of radar communication, and more specifically relates to a carbon-fibre composite as well as a preparation method thereof and a radar antenna using the carbon-fibre composite. The carbon-fibre composite comprises epoxy resin and high strength carbon fiber; the total weight of all components is 100%, the weight percentage of the high strength carbon fiber is 60-70%, and the weight percentage of epoxy resin is 30-40%; the high strength carbon fiber is continuous filament type carbon fiber treated by polyacrylonitrile; the fiber has low density, high tensile strength and yield strength. The preparation method comprises the following steps: obtaining of prepreg, layered paving as well as insulation and pressure maintaining. The radar antenna comprises a casing, a feed network, an upper frame and a lower frame, the cross sections of the upper frame and the lower frame are trapezoids with narrow top and wide bottom, and a gap between the upper frame and the top of the lower frame forms an arrangement area for clamping and fixing the feed network. The radar antenna has the advantages of light quality, maintenance convenience, short manufacture period, and low manufacture cost.

The invention discloses an insulated winding or electromagnetic coil for electrical equipment and a sintering and forming process of the insulated winding or electromagnetic coil. The insulated winding or electromagnetic coil for the electrical equipment is a metal conductor for winding and welding a lead outside an inner main insulating layer; an interlayer insulating film is wound among various layers of the metal conductor; end-sealed insulating layers are wound at two ends of each layer of coil while the winding of the metal conductor and the interlayer insulation are realized simultaneously and sequentially realized; and an outer main insulating layer is wound outside the metal conductor of the winding or coil wound according to the specified turn numbers and layer numbers. The sintering and forming process of the insulated winding or electromagnetic coil is mainly characterized in that the winding or coil is wound by an inner main insulating layer, an external winding welding lead metal conductor, an interlayer insulating film, the end-sealed insulating layers and the outer main insulating layer on a die core of a metal die; a reinforced insulating layer is packed at the welded part of a lead or joint and a tap; the metal die in which the winding or coil is arranged is filled into a vacuum pressure sintering furnace, so that the insulating material and the metal conductor are bonded and integrally formed; and the electrical strength and the heat radiating effect of the insulating material are improved, so that the size is reduced, the process flow is simplified and the cost is reduced.

The invention relates to a multi-stage push cylinder and aims to provide a bush piston type double-stroke push cylinder with output pressure increasing with increase of the number of cylinder sections. The multi-stage push cylinder comprises a plurality of cylinder shafts, a plurality of cylinder barrels, a plurality of pistons, a plurality of partitions, a plurality of air holes, a front cover, a rear cover and the like. The multi-stage push cylinder is divided into a plurality of mutually independent chambers by the partitions. The cylinder shafts and pistons are connected in cascade. A bush piston is disposed inside at least one cylinder barrel and can serve as a pressure piston and also a cylinder barrel for another piston. The cylinder shafts of the multi-stage push cylinder are shortened, so that materials are economized, and types of stored parts are reduced. Pressure of the multi-stage push cylinder can be selected according to actual uses, and the multi-stage push cylinder is reliable to operate, convenient to use and easy to produce.

A radial-flow turbine containing cylinder, stator and rotor installed in cylinder, featuring a complete steam flow path, steam admission pipe, steam admission chamber, at least two or plurality of endiocentric energy converting flow path groups, at least one steam flow reversible flow path group and exhausting chamber, wherein the number of steam flow reversible flow path group is one less then that of endiocentric energy converting flow path groups, all endiocentric energy converting flow path groups and steam flow reversible flow path group are alternately arranged along axial direction of rotor, plurality of convergent nozzles are set at the outlet of steam admission chamber and end of flow reversible flow path groups, comparing with current technology. Said invention has advantages of high energy conversion efficiency and fine anti overspeed, anti vibration and shock resistance performance.

The invention belongs to the technical field of radar communication, and more specifically relates to a carbon-fibre composite as well as a preparation method thereof and a radar antenna using the carbon-fibre composite. The carbon-fibre composite comprises epoxy resin and high strength carbon fiber; the total weight of all components is 100%, the weight percentage of the high strength carbon fiber is 60-70%, and the weight percentage of epoxy resin is 30-40%; the high strength carbon fiber is continuous filament type carbon fiber treated by polyacrylonitrile; the fiber has low density, high tensile strength and yield strength. The preparation method comprises the following steps: obtaining of prepreg, layered paving as well as insulation and pressure maintaining. The radar antenna comprises a casing, a feed network, an upper frame and a lower frame, the cross sections of the upper frame and the lower frame are trapezoids with narrow top and wide bottom, and a gap between the upper frame and the top of the lower frame forms an arrangement area for clamping and fixing the feed network. The radar antenna has the advantages of light quality, maintenance convenience, short manufacture period, and low manufacture cost.

The invention discloses an instantly soluble hard alloy block and a preparation method and application thereof. The instantly soluble hard alloy block is made from materials in following percent by weight by binding with an adhesive: 25-35% of high carbon ferro-chrome, 0.5-1%. of rare earth, 15-40% of ferro-boron, 25-55% of ferro-vanadium, 2-6% of ferrosilicon, and 2-3% of ferronickel, wherein the adhesive is a resin adhesive. The instantly soluble hard alloy block has high hardness (Rockwell hardness HRC > / =73), good wear resistance, manufacture process simplicity, low cost, low surfacing current, convenience of selecting dimensions and shape, low time and labor consumption for a welder, etc., the problem that a quick-wear apparatus is short in life is solved, and the life of an original member is prolonged by 3-10 times.

The invention discloses a battery integral installation jig. The jig comprises a base plate, wherein the base plate is provided with a movable frame composed of a plurality of splints and a clamping mechanism used to generate sideslip force on the splints and tighten up the movable frame, the inside of the movable frame is provided with automatic reset mechanism which acts on the splints to generate a repelling force opposite to the sideslip force generated by the clamping mechanism and ensures that the movable frame can return to a natural state. The jig can automatically return to the normal position without manual operation after clamped, thus saving the production time and reducing the labor intensity of workers.

The invention provides a portable small-flow precise pressure regulating device. The portable small-flow precise pressure regulating device comprises an upper shell assembly, a precise pressure regulating assembly and a lower shell assembly. The upper shell assembly comprises a screw, an upper shell and a screw connecting part. The precise pressure regulating assembly comprises a first spring, aninner liner, a positioning base, a lower spring, a third gasket, a diaphragm, a limiting ring, an outer liner, a check block, an upper spring, an upper valve and a lower valve. The lower shell assembly comprises a lower shell, a first filler neck, a nut, a nozzle, a first gasket, a second filler neck and a second gasket. Precise pressure regulating of multiple media under different working conditions is achieved, and the portable small-flow precise pressure regulating device has the beneficial effects that the structure is relatively simple, output pressure is stable, and regulating is precise.