33results about How to "Achieving surface contact" patented technology

The invention relates to a preparation and determination method of a sample for compression of a metal material with high thermal conductivity. The preparation method comprises the following steps of I, preparing a metal cylinder by a sample of the metal material with high thermal conductivity, the metal cylinder having a diameter of [Phi]8 mm-[Phi]10 mm and a length of 10 mm-15 mm, and punching a point at an axial middle point position of the metal cylinder as a marker; II, drilling a blind hole with a diameter of [Phi]1.6 mm-[Phi]2.0 mm and a depth of 1.8 mm-2.2 mm; III, preparing a plug pin by selecting a wire made of a material the same metal cylinder or copper; and IV, putting a negative electrode end of an K-type thermocouple and a positive electrode end of the K-type thermocouple at two sides in the blind hole, and plugging the blind hole with the plug pin. The determination method comprises a step of measuring the sample on a thermodynamic simulation test machine to obtain a stress-strain curve of copper alloy. The preparation and determination method of the sample are simple and practicable; and flow stress test data results are accurate and stable.

The invention relates to a heating body installing structure of an energy-saving mini-sized electric cooker, comprising an outer pot, an inner container, a cover body and an electric heating body, wherein the inner container is arranged in the outer pot; the electric heating body comprises a heat conducting plate, an electric heating body and an insulation heat conduction layer; a pressing cavity is arranged on the heat conducting plate; the electric heating body is packed by the insulation heat conduction layer; the electric heating body and the insulation heat conduction layer are pressed in the pressing cavity of the heat conducting plate together; a heat conducting face is arranged on the heat conducting plate; the bottom part of the inner container is extended with at least two studs; the part of the heat conducting plate corresponding to every stud is provided with a through hole; the stud is screwed with a nut by penetrating a through hole; and the heat conducting plate is pressed at the bottom part of the inner container by the nut, thus the heat conducting face of the heat conducting plate is clung with the bottom part of the inner container together. As the electric heating body is tightly installed at the bottom part of the inner container by a screwing piece, and with the adoption of the heating body installing structure, the shortcoming that the electric heating body is likely to loose or drop off for using a heat-conducting adhesive, so that the heat can be directly transmitted to the inner container by the heating body, the waste of heat is reduced and the energy-saving effect is realized.

The invention provides an automobile embedded knob switch endurance test device. The automobile embedded knob switch endurance test device comprises a compression motor, a lifting support, a test motor, a synchronous belt, a driving gear and two driven rolling wheels, wherein the test motor, the synchronous belt, the driving gear and the two driven rolling wheels are installed on the lifting support. The compression motor is vertically fixed to an equipment support and located above a tested switch. The compression motor drives the lifting support between the tested switch and the compression motor through a lead screw pair. The two driven rolling wheels are located on the two sides of a knob of the tested switch respectively. The driving gear is located above the tested switch and is in butt joint with an output shaft of the test motor. The synchronous belt is wound around the driving gear and the two driven rolling wheels and pressed against the knob of the tested switch. According to the automobile embedded knob switch endurance test device, the two driven rolling wheels presses the synchronous belt which drives the knob of the tested switch to rotate on the knob, so that surface contact between the synchronous belt and the knob is realized, relative sliding between the synchronous belt and the knob is effectively prevented, and reliability of test results is guaranteed.

The invention discloses a petroleum pipe machining and conveying device which comprises a feeding plate, a support and a conveyor belt. The front and back sides of the feeding plate are provided withfixing frames through rotating shafts, the support is arranged at the bottom of the feeding plate, a first spring is installed at the top of the support, the top of the first spring is fixedly connected with the bottom of the feeding plate, the front and back side walls of the feeding plate are each provided with a second gear, the left and right sides of the second gears are each provided with afirst gear meshed with the second gears, and a third gear is installed at the side, away from the feeding plate, of each first gear. Due to a placement groove in the outer side wall of the conveyor belt, a pipeline to be transported is supported, surface contact between a pipeline and a placement component is achieved, the phenomenon that use of the pipeline is affected due to the fact that the appearance is abraded by the excessively small contact part is avoided, meanwhile, the pipe can be stable due to the placement groove, the phenomenon that the pipe rolls and transportation is hindered is avoided, and the device is suitable for being widely used and popularized.

The invention discloses a heat transfer substrate self-clamping type LED (light emitting diode) tubular lamp supported by a lamp shade, and a heat radiator of the LED tubular lamp, and belongs to the technical fields of support, suspension or connecting devices of illumination devices. The heat radiator of the LED tubular lamp comprises a heat radiating main body (1) and a heat transfer substrate mounting part (2), wherein the cross section of the heat radiating main body (1) is in a hollow semi-cylinder shape. The heat radiator is characterized in that the heat transfer substrate mounting part (2) is connected with a heat transfer bottom surface (11) and is provided with bar-shaped clamping grooves (21), and the bar-shaped clamping grooves (21) are used for mounting a heat transfer substrate (3). The heat transfer substrate self-clamping type LED tubular lamp supported by the lamp shade has the advantages that as the heat transfer substrate mounting part is provided with the bar-shaped clamping grooves, the heat transfer substrate can be clamped in the bar clamping grooves, and the heat transfer substrate is fixedly arranged on the heat radiator without screws, so the assembling efficiency is high, and the requirement of automatic and quick production is met; the heat transfer substrate is clamped in the bar-shaped clamping grooves and is in contact with multiple surfaces of the bar-shaped clamping grooves, so the heat radiating efficiency is improved, and the heat deformation of the heat transfer substrate is avoided.

The invention discloses a piston processing method which comprises the following steps of material selecting and smelting; pouring; thermal treatment; metal processing: carrying out neck ring turning, pinhole base hole processing and oil coating in sequence, wherein a neck ring turning device is adopted to carry out neck ring turning on a piston, a pinhole base hole processing device is adopted to carry out pinhole base hole drilling on the piston, and an automatic oil coating mechanism is adopted to carry out oil coating on the piston; and roundness test: adopting a piston roundness test device to test surface roundness of the piston. The piston processing method disclosed by the invention has the advantage of being high in strength and modulus, stable and precise in neck ring turning, stable in clamping, uniform in oil coating, high in oil coating efficiency, free of manual handheld measuring and wide in measuring position selectivity, and being capable of reducing tool abrasion, avoiding occurrence of oval holes during drilling, improving product quality, reducing a rejection rate and realizing simultaneously measuring roundness of the skirt part and the top part of the piston.

The invention relates to the technical field of power cable connectors, in particular to a quick connection device and a quick connector. The quick connection device is used to connect conductive parts, including conductive contact parts and a rotary clamp; the rotary clamp is provided with a groove; when the rotary clamp is rotated in the first direction, the groove is clamped with the conductive part; the conductive contact The piece is connected with the rotary fixture; the conductive contact piece can move back and forth along the axial direction of the conductive contact piece relative to the rotary fixture, so that the conductive contact piece abuts the conductive piece; the first direction has an included angle with the axial direction of the conductive contact piece; The conductive contacts are electrical conductors. The quick connector includes a conductor, a quick connection device, and an insulating protective sheath. The purpose of the present invention is to provide a quick connection device and a quick connector, which can be quickly connected without using tools, and have firm connection, large contact area, and good electrical conductivity, so as to solve the potential safety hazards of the connection methods in the prior art question.

The invention discloses a deburring clamp for an inner hole of a pipeline. The deburring clamp comprises a rotating shaft and a fixed spindle, wherein a driving gear is arranged on the rotating shaft in a sleeving manner; the fixed spindle comprises a smooth spindle and an edge spindle which are coaxial; a positioning cylinder is arranged on the smooth spindle in the sleeving manner; a driven gear is arranged on the positioning cylinder in the sleeving manner and is externally engaged with the driving gear; a pressing sleeve is arranged on the positioning cylinder in the sleeving manner and is in threaded connection with the positioning cylinder; an end part of the positioning cylinder is provided with a cone-shaped chuck; a small end face of the chuck is hinged to the end part of the positioning cylinder, and the conical surface-shaped side wall of the chuck is abutted against the pressing sleeve; the outer wall of the edge spindle is axially provided with an edge; the pipeline is arranged on the edge spindle in the sleeving manner, the inner wall of the pipeline is abutted against the edge, and the outer wall of the pipeline is abutted against the side wall of the chuck. The technical defects of low efficiency, high labor cost and poor quality of deburring of the inner hole of the pipeline at present are overcome; the deburring clamp for the inner hole of the pipeline has high deburring efficiency, low labor cost and good quality.

The invention relates to a high-temperature in-situ fretting-fatigue experimental system. The high-temperature in-situ fretting-fatigue experimental system comprises a test piece, a fretting-fatigue clamp, an extreme environment room, a base, a support base, a fretting stretching device, a fretting-fatigue loading device and a heating device; the test piece comprises a test section and a connection section; the test section is a dovetail joint structural part; the test section has two relatively arranged test surfaces; the connection section has two second contact planes; the fretting-fatigueclamp comprises a first clamp, a second clamp and a fretting bridge; an opened containing groove is arranged at one end; a friction surface is arranged in the containing groove; the containing grooveis used for containing the test section; the test surface and the friction surface are in surface contact; the second clamp is connected with the connection section and the fretting stretching device;the fretting bridge comprises a first fretting bridge and a second fretting bridge; the first fretting bridge is a flat fretting bridge; the second fretting bridge is a semi-cylindrical fretting bridge or a hemispherical fretting bridge; and the fretting-fatigue loading device is connected with the first clamp or the flat fretting bridge along the normal direction of the dovetail joint structuralpart of the test part.

Provided is a temperature control sensor for a water heater. The temperature control sensor for the water heater comprises a metal outer shell, wherein a thermistor is arranged inside the metal outer shell, the thermistor is connected with a temperature signal wire, the thermistor and the temperature signal wire are arranged inside the metal outer shell in a resin pouring mode, one end of the temperature signal wire extends out of the metal outer shell, the side face of the metal outer shell is connected with a trapezoid support, three installation holes are formed in the trapezoid support, and centers of the three installation holes are connected to form an isosceles triangle. According to the temperature control sensor for the water heater, the bottom face of the metal outer shell can be reliably and tightly attached to the surface of the water heater to achieve surface contact, and the temperature control sensor for the water heater is convenient to install.

The invention provides a foldable power plug, which comprises a shell, a bottom cover, a pin assembly and metal elastic sheets, wherein the pin assembly comprises a pin fixing piece and pins. The foldable power plug is characterized in that two ends of the pin fixing piece are a cylindrical rotation shaft; the side surface of the shell is provided with fasteners and a rotation shaft groove; the rotation shaft is matched with the rotation shaft groove; the bottom of the shell is provided with positioning pieces, fixing columns and wiring end openings; the positioning pieces are matched with a positioning matching part in the middle part of the pin fixing piece; an opening is arranged in the metal elastic sheet; the opening is matched with the fixing column on the bottom surface of the shell; the metal elastic shell is also provided with a pin clamping part; the bottom surface of the bottom cover is provided with a square groove matched with the pin; the top part of the back surface of the groove is provided with a square boss; the side surface of the bottom cover is provided with a fastening and matching piece; the fastener is matched with the fastening and matching piece. Through the design of the clamping part of the metal elastic sheet, surface contact between the pin and the metal elastic sheet is realized, and contact effects are enhanced.

The invention discloses a method for clamping a square bar on a three-jaw self-centering chuck. The method comprises the following steps: (1) a hollow pipe with the inner diameter slightly greater than that of the square bar is selected, and a longitudinal joint of the hollow pipe is cut in the length direction; (2) the square bar is inserted into the hollow pipe; and (3) the hollow pipe inserted with the square bar is clamped on the three-jaw self-centering chuck. The method has the following beneficial effects: a regular hollow pipe fitting coats an irregular workpiece, so that the surface contact is realized between jaws and the hollow pipe, and the clamping stability is improved; and the longitudinal joint is arranged on the hollow pipe, and the inward uniform pressure can be generated to the square bar in clamping, so that the clamping force is enhanced.

The invention provides a vibration reduction bottom foot and intelligent cooking equipment. The vibration reduction bottom foot comprises a weighing scale beam, a supporting leg, a vibration reduction part and a buffer gasket, wherein the weighing scale beam is provided with a pressed end and an abutting end, the pressed end and the abutting end are horizontally and oppositely arranged, and the pressed end is used for bearing the weight of the intelligent cooking equipment; the supporting leg is provided with a fixed end and a mounting end which are vertically and oppositely arranged, and the fixed end supports and is fixedly connected with the abutting end; the vibration reduction part is hollow; the vibration reduction part is provided with a top wall, a bottom wall and a surrounding wall, the top wall and the bottom wall are vertically and oppositely arranged, the surrounding wall is connected with the top wall and the bottom wall, a mounting opening is formed in the top wall so as to enable the mounting end to extend into the vibration reduction part, gaps exist between the mounting end and the periphery of the mounting opening and between the mounting end and the surrounding wall, and an elastic structure is arranged on the bottom wall in a protruding mode; and the buffer gasket is clamped between the mounting end and the elastic structure. According to the technical scheme, the vibration reduction effect of the vibration reduction bottom foot can be improved.

The invention relates to a mobile terminal, an antenna assembly of the mobile terminal and a manufacturing method thereof. The antenna assembly of the mobile terminal comprises a metal shell and an antenna bonding pad, the metal shell is further used as an antenna, and the antenna bonding pad and the metal shell form a whole through a 3D printing process. The technical scheme provided by the invention has the following advantages: firstly, surface contact between the antenna bonding pad and the metal shell is realized, and the surface contact is firmer and more reliable than a point contact mode in the prior art; secondly, a liquid metal alloy material is sprayed through the 3D printing process, the antenna bonding pad is directly printed on the metal shell, and compared with a spot welding process in the prior art, the operation is convenient, and manpower is saved; and thirdly, the metal alloy material replaces gold in the prior art, so that the material cost is saved.

The invention discloses a clamp feeding mechanism. According to the mechanism, a linear motion of an air cylinder can be converted into a circular motion of the clamp, the situation that a clamping plane of the clamp is parallel to the lower bottom surface of a support during a motion process is realized, surface contact is achieved when the clamp clamps a plate, the surface of the plate is not damaged, service life of the clamp feeding mechanism is guaranteed, structure is simple, action is reliable, and an electromagnetic valve controls actions of the air cylinder so as to realize automaticclamping and loosening of the clamp, time and labor are saved.

The invention provides a circular inclined column formwork supporting method, and relates to the technical field of formwork supporting. The method comprises the following steps: surveying and setting out, and marking a vertical support position and an inclined support position; the adjusting device is hinged to the supporting base plate, and then the supporting base plate is installed at the inclined strut position on the ground; vertical supports are installed according to the vertical support positions; the supporting pipe is arranged at the end of the adjusting device in a sleeving mode, and the supporting pipe and the vertical support are connected together through a fastener; the arc-shaped bracket is installed at the end of the supporting pipe; mounting a circular inclined column template on the arc-shaped bracket from bottom to top, and fixing the circular inclined column template by using a hoop; and the adjusting device is rotated to adjust the angle of the circular inclined column template. The circular inclined column formwork is supported through the arc-shaped bracket, surface contact between the arc-shaped bracket and the formwork is achieved, the stress area is increased, the formwork is prevented from deforming, and the supporting stability is improved. The supporting base plate is connected with the ground, the contact area between the supporting base plate and the ground is increased, and the advantages of being good in stress, safe and reliable are achieved.