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36results about How to "Reduced dimensional tolerance requirements" patented technology

Ceramic glow plug and structure for mounting the same onto cylinder head

InactiveUS20020130121A1Easily and reliably prevent a serious accidentAvoid enteringIncandescent ignitionCylinder headsCylinder headEngineering
A glow plug in which a ceramic heater is fixedly disposed in a metallic, cylindrical member such that a front end thereof projects from a front end of the cylindrical member, and the resultant cylindrical member is fixedly disposed in a plug body such that the front end of the cylindrical member projects from a front end of the body, and which readily provides a mounting structure such that, even when loosening arises at a joint between the body and the cylindrical member after the glow plug is mounted onto a cylinder head, the cylindrical member is prevented from dropping into the interior of an engine. A portion 23 of a cylindrical member 3 projecting from a front end 4 of a plug body 4 has outside diameter D2, which is defined as a smaller diameter than a portion of the metallic, cylindrical member which is fixedly disposed within the metallic, cylindrical plug body (a large-diameter portion 33 of the cylindrical member 3). A front-end-oriented end face 3t is formed in a diameter transition region where the outside diameter changes between the two diameters. In a mounting bore formed in a cylinder head, bore diameter D3 of a dead end portion, against which the front end 4a of the body 4 is pressed, is rendered smaller than outside diameter D1 of a large-diameter portion 33 of the cylindrical member 3. Since the dead end portion prevents movement of the cylindrical member 3, even when the cylindrical member 3 comes off the body 4, the member 3 does not drop into the interior of an engine.
Owner:NGK SPARK PLUG CO LTD

Anti-drop structure for regulating valve bushing

The invention relates to an anti-drop structure for a regulating valve bushing, which comprises a valve body, a valve seat, a valve cover, a valve rod, a valve core and a bushing, wherein the valve seat is fixed in the valve body, the valve cover is fixed on the valve body, the valve rod is spliced in the valve cover in a sliding and sealing manner, the valve core is fixed at the bottom end part of the valve rod, an end face of the bushing pushes against limiting steps, a limiting outer conical surface is arranged at the outer side edge of the other end part of the bushing, and the other end part of the bushing is contacted with a limiting inner conical surface of an extruding flange. With the adoption of the structure, tools such as a drilling bit and a screw tap are not required during the assembly course, as the drilling bit and the screw tap are easy to break when in use to cause work injuries, dangerous processing procedures are reduced, the requirement for the dimensional tolerances of the bushing and a matching surface of the bushing is lowered, the assembly is faster and more reliable, the assembly efficiency is improved, the number of the location steps is increased, the drop of the bushing is effectively prevented, the reliability of a product is improved, the service life of the product is prolonged, and the significant economic benefit is achieved.
Owner:WUXI SMART AUTO CONTROL ENG CO LTD

Lens assembly, camera module, terminal and assembling method of lens assembly

The embodiment of the invention discloses a lens assembly, a camera module, a terminal and an assembling method of the lens assembly, wherein the first lens comprises a first lens barrel and a first lens group, the image side surface of the first lens group is a first surface, and the first surface is provided with a first connecting part; the second lens is located at the image side of the firstlens, the second lens comprises a second lens barrel and a second lens group, the object side surface of the second lens group is a second surface, the second surface is provided with a second connecting part, and the second connecting part is adjustably connected with the first connecting part; the image side surface of the first lens barrel is a third surface, the object side surface of the second lens barrel is a fourth surface, the second lens has a second optical axis, and the orthographic projection of the third surface on the reference surface where the second optical axis is located isa first projection; the orthographic projection of the fourth surface on the reference surface is a second projection, and the first projection and the second projection do not coincide. According tothe embodiment of the invention, the resolution effect of the lens assembly can be improved, and the adjustable range is large enough.
Owner:JIANGXI JINGCHAO OPTICAL CO LTD

Clearance adjusting mechanism for stator and rotor of electric vacuum pump

The invention, which belongs to the field of manufacturing en electronic vacuum pump for en electric vehicle, relates to a clearance adjusting mechanism for a stator and a rotor of an electric vacuum pump. A motor base, a motor bracket, a rotary cylinder and a clearance adjusting head limiting base are fixedly connected to a base. The bottom of a motor main body is arranged on the motor base; an upper flange is arranged on the motor bracket; and the bottom of a mould is arranged on the motor bracket. A rotor is connected with a motor output shaft; a stator is arranged between the mould and the rotor; and an adjusting clearance is formed between the mould and the stator. A spring self-adjusting rod device is installed at one side of the mould and an error removing lever and a clearance adjusting lever are installed at the other side of the mould. The top of the rotary cylinder is in rotating connection with a clearance adjusting head having a tapered head part. The clearance adjusting mechanism has the following advantages: the structure is novel; the taper of the clearance adjusting head is used for measurement, so that the assembling processes of the stator and the rotor are simplified substantially; the operation is simple and convenient; the clearance can be adjusted; the consistency is high; the product quality is guaranteed; and the production take time is increased.
Owner:JILIN DONGGUANG AOWEI AUTOMOBILE BRAKE SYST

A chip package electrode and its preparation method and chip package structure

The invention provides a chip packaging electrode, a preparation method thereof and a chip packaging structure. The chip packaging electrode includes: an electrode plate and a first molybdenum-copper alloy layer, an elastic layer and a second molybdenum-copper alloy layer stacked on the electrode plate, wherein the first molybdenum-copper alloy layer and the second molybdenum-copper alloy layer The mass percentage of molybdenum in the copper alloy layer increases gradually along the direction away from the electrode plate, and the elastic layer is made of a composite material formed of copper and elastomer. In the first molybdenum-copper alloy layer and the second molybdenum-copper alloy layer, copper ensures that the electrode has excellent electrical conductivity. Since the thermal expansion coefficient of molybdenum is more compatible with the chip, the damage caused by the thermal expansion coefficient mismatch to the electrode or chip is reduced. ; In the elastic layer, copper ensures the conductivity of the electrode, and the addition of elastomer increases the elasticity of the electrode, further reducing the risk of mechanical damage to the chip. The packaging electrode has a compact structure, and the distance between the electrode and the chip is suitable, which ensures good heat dissipation of the chip.
Owner:GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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