47results about How to "Improve mechanical shock resistance" patented technology

Provided is a current detection circuit module wherein it is possible to correct the current detection sensitivity before assembling a finished product and to achieve high mechanical shock resistance. A current detection circuit module (11) provided with a control circuit board (9) on which a control IC (7) for controlling power modules (5) is mounted, magnetic cores (21) which each have a gap (27) on a portion thereof and which surround busbars (15) extending from the power modules (5), magnetic detection elements (40) which are disposed within the gaps (27), and a detection circuit (44) which outputs to the control IC (7) the detection signal of the current value flowing through the busbars (15) in response to the output of the magnetic detection elements (40), wherein the detection circuit (44) is mounted on the control circuit board (9), the control circuit board (9) is provided with passing parts (29) which are formed by notches and which are used to arrange the busbars (15) perpendicular to the board surface, the magnetic cores (21) are mounted on the control circuit board (9) so as to surround the respective busbars (15) passing the respective passing parts (29), and the magnetic detection elements (40) are mounted on the control circuit board (9) such that the magnetic detection elements (40) are located within the gaps (27) of the respective magnetic cores (21).

The invention relates to an electrical contact material, in particular to a graphene reinforced copper-based electrical contact composite material and a preparation method of the material. The electrical contact material is prepared from, by weight, graphene 0.1-1.0% and copper alloy 99.0-99.9%. The preparation method comprises the steps of copper alloy atomization, ball milling and powder mixing, primary molding, sintering, secondary molding and sintering. The graphene is added in the copper alloy to serve as a framework of the electrical contact material, so that reduction of electrical conductivity and thermal conductivity is avoided while the material has high hardness, mechanical shock resistance performance and arc ablation resistance performance. A cold-pressing molding sintering preparation technology is adopted in the preparation method, the production cost is reduced, and the electrical contact material is suitable for large-scale industrial production.

This invention provides a moving iron unit for loudspeakers, which includes coil, iron core, diaphragm, and magnet, among which, the iron core is disposed in the coil, and the magnet is connected to the diaphragm on a transmission basis. It is characterized in that it also includes vibrating ring, to which the magnet is secured, and which is secured to the inner wall of a shielded cavity through its elastic body disposed radially, and which is connected to the diaphragm on a transmission basis through the transmission rod. Further, the unit comprises two diaphragms, which are disposed symmetrically at two sides of the vibrating ring and connected respectively to the vibrating ring on a transmission basis through a transmission rod. The coil is shaped directly by coiling on the iron core.

Relating to the field of thermal insulation materials, the invention discloses an energy-saving and environment-friendly thermal insulation material and a preparation method thereof. The energy-savingand environment-friendly thermal insulation material comprises the following raw materials by weight: 8-15 parts of calcium carbonate powder, 12-25 parts of industrial coal slag, 5-12 parts of aluminum oxide, 2-5 parts of aluminum stearate, 8-15 parts of waste asbestos, 5-9 parts of polypropylene fiber, 11-18 parts of bamboo charcoal powder, 12-18 parts of coconut shell powder, 7-16 parts of attapulgite, 8-13 parts of quartz powder, 11-23 parts of potassium feldspar, 12-17 parts of montmorillonite, 15-21 parts of waste polyethylene foam plastic, 20-28 parts of Portland cement, 0.8-2 parts ofsodium pyrophosphate, 0.6-1.2 parts of a penetrating agent, 0.6-1.2 parts of a water reducing agent, 0.4-0.8 part of a foaming agent, and 10-15 parts of water. Through coordination of the raw materials, the thermal insulation material provided by the invention has low thermal conductivity coefficient, excellent thermal insulation performance, and also has the advantages of high mechanical impact resistance, good flame retardance and high crack resistance.

The invention discloses an anti-mechanical shock armature device with an innovated structure used for a moving-iron receiver/ speaker. The anti-mechanical shock armature device comprises a vibration energy changing part, an anti-mechanical shock device and magnetic conduction connection parts, and is characterized in that the vibration energy changing part which is of a planar structure is arranged in the middle, the protruding and concave-shaped anti-mechanical shock device which is directly crossed with the planar structure is distributed on the vibration energy changing part, and the vibration energy changing part is further connected with the magnetic conduction connection parts arranged on the two sides and tail portion to form the armature device. Compared with a traditional armature device, the anti-mechanical shock armature device has at least the advantages that the anti-mechanical shock device is additionally arranged to the vibration energy changing part in an innovated mode, the mechanical shock resistance property of the moving-iron receiver/ speaker using the armature device is greatly improved, manufacturability is strong, cost is low, and packaging technology is simple and convenient in the subsequent manufacturing process of the receiver/ speaker. In addition, the anti-mechanical shock device can also be applied to various armature devices conveniently, and a marketing value is large.

An electrochemical device includes a housing, an electrode assembly, a first bonding piece, a second bonding piece, and a third bonding piece. The electrode assembly comprises pole pieces and an isolating membrane. The pole pieces comprise a first pole piece and a second pole piece, and the isolating membrane is arranged between the first pole piece and the second pole piece. The electrode assembly is of a winding structure and is arranged in the shell. In the winding direction, the electrode assembly comprises a first section, a first bent section, a second section and a second bent section, wherein the outermost ring of the first section is the isolating membrane. The electrode assembly includes a first end portion and a second end portion opposite to each other in a winding center axis direction. The first bonding piece is bonded with the outer surface of the first bent section and the tail part of the isolating membrane; the second bonding piece is bonded on the outer surface of the second bent section and is bonded on the tail part of the first pole piece; and the third bonding piece is arranged at the first end part and is bonded with the outer surface of the isolating membrane at the outermost ring of the first section and/or the outer surface of the pole piece at the outermost ring of the first section. The security is improved. The invention further provides an electronic device.

The invention discloses anti-corrosion paint for a guardrail surface layer and a preparation method thereof, and relates to the field of paint. The paint is prepared from the following raw materials in parts by weight: 30 to 40 parts of epoxy resin, 25 to 30 parts of organic silicon resin, 10 to 20 parts of polyvinyl acetate, 5 to 10 parts of mica powder, 6 to 12 parts of attapulgite, 4 to 10 parts of silicon dioxide, 3 to 8 parts of ceramic fiber, 3 to 6 parts of nanometer titanium dioxide, 3 to 6 parts of nanometer magnesium hydroxide, 3 to 6 parts of nanometer antimonous oxide, 2 to 5 partsof nanometer iron powder, 3 to 6 parts of tea meal powder, 4 to 7 parts of bamboo charcoal powder, 2 to 5 parts of zirconium oxide, 1.8 to 3.6 parts of pigments, 2.5 to 4.5 parts of silane coupling agents, 2.2 to 3.8 parts of anti-aging agents, 1.4 to 3.1 parts of leveling agents and 2.5 to 4.8 parts of tackifiers. The anti-corrosion paint has the advantages of high bonding performance, stable physicochemical property, high anti-corrosion performance, difficult pulverization falling, high anti-mechanical-impact performance, bacteriostatic effect and air purification effect.

The invention provides a high-temperature-resistant and easy-to-unroll composite expansion adhesive tape. The composite expansion adhesive tape comprises a base layer and an adhesive layer which are compounded with each other, and the adhesive layer comprises a temperature-resistant layer; and the base layer is an oriented polystyrene film, and the oriented polystyrene film is prepared from, by weight, 85-90% of general polystyrene, 5-8% of high-impact polystyrene and 0.9-2.3% of nano silicon dioxide. The composite expansion adhesive tape provided by the invention has high expansion rate, can be kept not shrunk at high temperature, and is easy to uncoil in industrial production.

The invention discloses a flapping device used for a minitype loudspeaker device, wherein the flapping device is provided with an improved structure. The flapping device comprises a vibrating disk part, a mechanical structure reinforcing rib part and through hole structures, and is characterized in that the vibrating disk part is of a planar structure, the mechanical structure reinforcing rib part is arranged on a vibrating disk according to the design demands, at the same time, and a plurality of through hole structures are distributed in the vibrating disk and the mechanical structure reinforcing rib part to form the flapping device together. The flapping device has at least the advantages that compared with a traditional flapping device, the flapping device makes an improvement on the design of a mechanical structure reinforcing rib, and a mechanical shock resistance property and vibration stability of the flapping device are greatly improved. Compared with a traditional design, the design of the flapping device is strong in manufacturability and low in cost. In addition, the flapping device can meet different frequency response requirements of various minitype loudspeaker devices by adjusting of the shapes of the vibrating disk, the shapes and the number of mechanical structure ribs and the through holes, and an application range is very wide.

The invention provides a knife stone, which is prepared from the following components in parts by weight: 14 to 23 parts of a first particle material, 55 to 69 parts of a second particle material, 9 to 14 parts of a third particle material, 7 to 10 parts of a powder material and 0.4 to 1 part of a liquid binding agent, the particle size of the first particle material ranges from 0.425 mm to 0.85 mm, the particle size of the second particle material ranges from 0.25 mm to 0.425 mm, and the particle size of the third particle material ranges from 0.15 mm to 0.25 mm. The knife stone is high in density and uniform in structure, has good mechanical shock resistance, wear resistance and self-sharpening performance, is beneficial for cutting a knife, has high-content chromic oxide, and can greatly improve the recovery value of sediment when being used for grinding chromic oxide bricks.

A piezoelectric diaphragm has principal-surface electrodes formed on upper and lower principal surfaces of a multilayer ceramic body. An internal electrode is disposed in an interface between adjacent piezoelectric ceramic layers. The upper and lower principal surfaces of the multilayer ceramic body are substantially entirely covered with a resin layer. A first cutout is formed in a side-edge portion, along the first side surface electrode, of the upper resin layer such that the upper principal-surface electrode is partially exposed in the first cutout. A second cutout is formed in a side-edge portion, along the first side surface electrode, of the lower resin layer such that the lower principal-surface electrode is partially exposed in the second cutout. The locations of the first and second cutouts formed in the upper and lower resin layers, respectively, are selected such that they do not oppose each other.

The invention discloses an enameled wire for an oil-cooled motor of a new energy automobile and a production and processing technology thereof, and belongs to the technical field of enameled wire production and processing. The enameled wire comprises a copper conductor, a primer layer, a middle paint layer and a finish paint layer, the primer layer adopts high-adherence polyamide-imide paint, the middle paint layer adopts corona-resistant polyimide paint, the finish paint layer adopts oil-resistant and hydrolysis-resistant polyamide-imide paint, the paint film thickness of the primer layer accounts for 3%-20% of the total paint film thickness, the middle layer accounts for 40%-90% of the total paint film thickness, and the finish paint layer accounts for 3%-20% of the total paint film thickness. According to the invention, three different types of insulating paint are combined for coating, and the primer layer, the intermediate paint layer and the finish paint layer are respectively coated with different types of paint, so that the primer layer, the intermediate paint layer and the finish paint layer play respective advantages and make up for deficiencies, and finally, the enameled wire for the oil-cooled driving motor of the automobile, which has the advantages of corona resistance, high winding property, mechanical shock resistance and strong oil-water resistance, is prepared.

The invention discloses a tough column-type porcelain insulator for a high-voltage line. The insulator comprises an insulator body, an upper steel cap and a lower steel cap. The insulator body is provided with a bone column body, and an upper core head and a lower core head which are integrally connected with the two ends of the bone column body. Large umbrella skirts and small umbrella skirts arearranged on the bone column body at intervals. An annular groove and a plug-in slot are formed in the upper core head. Annular bosses are arranged on the surface of the inner side of the upper steelcap at intervals. A plug connector is arranged between the upper steel cap and the upper core head. Annular clamping slots are formed in the lower core head at intervals in the axial direction of thelower core head. Annular trenches are formed in the surface of the inner side of the lower steel cap at intervals. A clamping piece is arranged between the lower steel cap and the lower core head. Thetough column-type porcelain insulator has the advantages of high mechanical strength, excellent electrical performance, good quality stability and reliability, high mechanical impact resistance, highpollution resistance, small maintenance workload and low cost, and can completely meet the technical requirements on a column-type porcelain insulator for a 110-330KV high-voltage power transmissionline.