55results about How to "Achieve interference fit" patented technology

The invention discloses a constrained ceramic-metal composite bulletproof armored plate and a making method thereof. The constrained ceramic-metal composite bulletproof armor plate consists of a plurality of constrained ceramic-metal composite bulletproof units; each constrained ceramic-metal composite bulletproof unit comprises a metal back plate, a metal constrained plate and a ceramic block, wherein the metal constrained plate and the ceramic block are arranged on the metal back plate, the ceramic block is arranged in the metal constrained plate, and the ceramic block and the metal constrained plate are assembled and connected through interference fit. The constrained ceramic-metal composite bulletproof armored plate disclosed by the invention has a broad application prospect in variousbulletproof occasions of armed helicopters, armored cars, ships and warships, tanks and the like.

The invention belongs to the field of heat exchanger machining, and particularly relates to a tube threading device for a heat exchange tube bundle. The tube threading device comprises a frame, a fixing and conveying unit, a pressing and conveying unit, and a driving unit, wherein the frame is provided with an open accommodating space, the fixing and conveying unit is positioned in the open accommodating space, the pressing and conveying unit is located in the open accommodating space and located above the fixing and conveying unit, an adjustable space for containing heat exchange tubes is formed between the pressing and conveying unit and the fixing and conveying unit, and the driving unit is used for driving the fixing and conveying unit and the pressing and conveying unit to move. The tube threading device for the heat exchange tube bundle has the beneficial effects that continuous threading of the heat exchange tubes is achieved, the labor intensity of workers is reduced, the number of operators is reduced, cost is saved, the tube threading efficiency is improved, and the heat exchanger production speed is increased.

The invention relates to a shoe sole clamping and positioning device. The shoe sole clamping and positioning device comprises a clamping mechanism and a shoe sole carrier. The clamping mechanism comprises two clamping assemblies which are oppositely arranged. The clamping assembly comprises a clamping unit. The clamping unit comprises a clamping driver, a floating base connected with the clampingdriver, a pressing block hinged to the floating base, and clamping wheels connected to the pressing block in a pivoted mode. The multiple clamping wheels are distributed at an extrusion end of the pressing block. The sole carrier is arranged between the two clamping assemblies. The sole carriers are used for loading a sole. According to the shoe sole clamping and positioning device, the shoe solecarrier located between the two clamping assemblies is used for bearing the shoe sole. The clamping assembly is provided with the floating extrusion clamping unit, the shoe soles with different peripheral side shapes can be used, a traditional manual holding mode is replaced, mechanical positioning of the shoe soles during outer side polishing is achieved, the positioning effect is stable, the positioning precision is high, product quality control is facilitated, and the working efficiency is improved.

The invention discloses a multi-station pinion shaft pressing assembling machine which comprises a stand, a steel-shaft feeding device, a pinion feeding device, a pre-positioning clamp, a shaft pressing assembling device, a transmission mechanism and a control system. The transmission mechanism is arranged on the stand and comprises a motor, a main transmission wheel, an auxiliary transmission wheel and a transmission chain or a transmission belt; the axes of all the transmission wheels and the motor are arranged horizontally; the shaft of the main transmission wheel is connected with the shaft of the motor; the pre-positioning clamp is fixedly connected with the transmission chain or the transmission belt; the motor is controlled by the control system to drive the transmission chain or the transmission belt to transmit intermittently in a positioning way; a shaft dropping station, a pinion pushing station and a shaft pressing assembling station are arranged on the stand along the transmission direction of the transmission chain or the transmission belt; and the steel-shaft feeding device, the pinion feeding device and the shaft pressing assembling device are arranged on the shaft dropping station, the pinion pushing station and the shaft pressing assembling station correspondingly. By adoption of the multi-station pinion shaft pressing assembling machine, the efficiency of assembling the pinion and the steel shaft assembly can be effectively improved, the interference fit of the pinion and the steel shaft can be realized reliably, the discharging can be convenient, the manpower can be saved, and the shaft pressing assembling of the pinion with different types and the steel shaft can be realized through adjustment or reconstruction.

The invention provides an interference assembling tool for a cylindrical part. The interference assembling tool for the cylindrical part comprises a jack. The jack comprises a cylinder body and a telescopic piston rod. A through hole axially penetrating through the cylinder body and the piston rod is formed in the jack. A guide rod is arranged in the through hole in a penetrating mode. A left blocking piece and a right blocking piece are installed at the two ends of the guide rod respectively. The jack is located between the left blocking piece and the right blocking piece. The cylindrical part is assembled in a component under the pushing force of the piston rod of the jack, and therefore interference assembling of the cylindrical part is achieved, the whole assembling process is conveniently and fast conducted, time-saving and labor-saving, one or two cylindrical parts can also be assembled once, and assembling efficiency is improved. The interference assembling tool for the cylindrical part is suitable for interference assembling of cylindrical parts of all kinds of sizes, and is wider in applicable range.

The invention belongs to the field of electrostatic plate-type electric fields and discloses an electrostatic plate type electric field. The electrostatic plate type electric field comprises a shell;multiple high-voltage negative plates, multiple low-voltage negative plates, multiple positive plates, a first connecting rod, a second connecting rod and a third connecting rod are arranged in the shell; the multiple high-voltage negative plates are inserted into the first connecting rod in a penetrating mode and connected with the first connecting rod in an interference fit mode; the multiple low-voltage negative plates are inserted into the second connecting rod in a penetrating mode and connected with the second connecting rod in an interference fit mode; and the multiple positive plates are inserted into the third connecting rod in a penetrating mode and connected with the third connecting rod in an interference fit mode. The electrode plates and the connecting rods of the electrostatic plate type electric field are in interference fit, connection is stable, assembling is convenient, and meanwhile, the invention further provides an assembling tool and an assembling method.

The invention relates to an anti-rotating insulating support and an anti-rotating method thereof. The anti-rotating method is characterized in that the outer side surface of a metal inner sleeve and the inner side surface of a middle medium are respectively provided with a first platform mutually fit along the direction of the pipe length so as to lead one part of a curve surface attached tightlybetween the metal inner sleeve and the middle medium to be attached tightly in a plane; an outer ring of the part of the cross section of the metal inner sleeve, provided with the first platform, is a round flaw shape of a round flaw angle between 15 degrees to 90 degrees; the outer side surface of the middle medium and the inner side surface of the metal outer ring are respectively provided witha second platform fit along the direction of the pipe length so as to lead one part of a curve surface attached tightly between the middle medium and the metal outer ring to be attached tightly in a plane; and an outer ring of the part of the cross section of the middle medium, provided with the second platform, is a round flaw shape of a round flaw angle between 15 degrees to 60 degrees. The invention can prevent relative rotation among three-layer parts of the insulating support, simultaneously has simple method, easy processing, low cost and reliable work.

The invention provides an interference assembling tool for a cylindrical part. The interference assembling tool for the cylindrical part comprises a jack. The jack comprises a cylinder body and a telescopic piston rod. A through hole axially penetrating through the cylinder body and the piston rod is formed in the jack. A guide rod is arranged in the through hole in a penetrating mode. A left blocking piece and a right blocking piece are installed at the two ends of the guide rod respectively. The jack is located between the left blocking piece and the right blocking piece. The cylindrical part is assembled in a component under the pushing force of the piston rod of the jack, and therefore interference assembling of the cylindrical part is achieved, the whole assembling process is conveniently and fast conducted, time-saving and labor-saving, one or two cylindrical parts can also be assembled once, and assembling efficiency is improved. The interference assembling tool for the cylindrical part is suitable for interference assembling of cylindrical parts of all kinds of sizes, and is wider in applicable range.

The invention discloses a constrained ceramic-metal composite bulletproof armor plate and a preparation method thereof. It is composed of a plurality of constrained ceramic-metal composite ballistic-resistant units, and each constrained ceramic-metal composite ballistic-resistant unit includes a metal back plate and a metal constrained plate. and the ceramic block, the metal constraining plate and the ceramic block are arranged on the metal back plate, the ceramic block is arranged inside the metal constraining plate, and are assembled and connected with the metal constraining plate through interference fit. The constrained ceramic-metal composite bulletproof armor plate of the present invention has broad application prospects in various bulletproof occasions such as armed helicopters, armored vehicles, ships and tanks.

The invention discloses a spring fixing structure of a rolling rotor type compressor and the rolling rotor type compressor, and belongs to the technical field of compressors. The spring fixing structure of the rolling rotor type compressor comprises a spring hole, a fixing chamber and a spring, wherein the spring hole is formed in a cylinder body and extends from the outer wall surface into a slip sheet groove used for mounting a slip sheet in the radial direction of a cylinder; the fixing chamber is formed in the cylinder body and structured by a part, close to the outer wall surface of the cylinder, of the spring, wherein the part is enlarged along the spring hole diameter; the spring is provided with a partial pressing part which can be freely telescoped and is arranged in the spring hole and a radially-enlarged fixing part which is connected with the partial pressing part; a partial pressing end of the partial pressing part abuts against the slip sheet; the diameter of the fixing part is larger than that of the spring hole, and the fixing part is supported into the fixing chamber; a part, abutting against the spring, of the fixing chamber, is a plane through which the fixing part of the spring can be stably propped, and thus the spring can be continuously and effectively fixed, and as a result, the sealing between the slip sheet and a roller can be ensured.

The invention discloses a dismounting and mounting method and device of a segmented crankshaft of a marine low speed diesel engine. The device comprises a lower bearing bush fixed tool, a built-in operation platform, a centering tool, a front-and-back crankshaft connecting hydraulic expansion bolt, a crankshaft chain wheel connecting hydraulic expansion bolt, a short stop plate and a long stop plate. The hydraulic expansion bolt is adopted to replace a traditional fitting bolt, and in the mounting process, hydraulic pressure is used for enabling a tapered bushing to be expanded, so that interference fit of the hydraulic expansion bolt and the surface of a connecting hole is achieved, torque transmission is ensured, in the dismounting process, the hydraulic pressure is used for enabling the conical bushing to be restored, the clearance fit between hole shafts is achieved, and the damage to the inner wall of the connecting hole is avoided. According to the device, nondestructively disassembling is achieved, the scrap returning rate is reduced, and the advantages of being easy and convenient to dismount and mount, high in operation efficiency, high in tool generality and long in service life are achieved. The device is suitable for manufacturing and mounting of all large type ship low-speed diesel engines with segmented crankshaft structure.

The present invention relates to the technical field of disposable sanitary products, in particular to a servo conveying mechanism after the baby's pull-up pants are folded in half. wheel, the support frame is strip-shaped and is formed by splicing mounting plates made of rigid materials, the thickness of the mounting plate is 1-3 mm, a plurality of mounting holes are opened on the mounting plate, and the passive guide wheel The thickness of the passive guide wheel is 10-20mm. A round belt in a closed-loop state is stretched on the active guide wheel and each passive guide wheel. The diameter of the round belt is the same as that of the passive guide wheel. The thickness is the same. The utility model solves the phenomenon of inclination and wrinkling of the pull-up pants due to friction during the conveying process of the discontinuous pull-up pants crotch portion due to friction.