152results about How to "Uniform friction" patented technology

An article is described including an article surface, a primer coating or layer of SiOx, SiO_xC_y or SiN_xC_y applied to the article surface, and a deposit of lubricant applied to the primer coating or layer. The primer coating or layer of SiO_x, SiO_xC_y or SiN_xC_y is applied by chemical vapor deposition of a polysiloxane or polysilazane precursor in the presence of oxygen. A first deposit of lubricant is applied to the primer coating or layer. The primer coating or layer improves the adhesion or wetting of the lubricant on the surface to be lubricated. Examples of such an article are a prefilled syringe having a barrel with a lubricated interior portion and a plunger tip that slides along it. Another example of such an article is a vial having a lubricated opening to receive a septum. Another aspect of the invention is a method of making such an article.

A hinge has a sleeve and a shaft and is mounted between a cover and a base of an electrical device. The sleeve is hollow, is attached to the base and has an internal diameter. The shaft is attached to the cover, is mounted pivotally in the sleeve and has a hollow torsion rod. The torsion rod has an external diameter, an opening end and multiple slots. The external diameter of the torsion rod is bigger than the internal diameter of the sleeve to provide friction. The slots are formed in the torsion rod without communicating with the opening end to provide uniform friction. Because the torsion rod is hollow to provide spaces for the torsion rod to be deformed, the torsion rod maintains its shape. Therefore the torsion rod provides uniform friction with the sleeve.

The invention discloses a specific crystallizer casting powder for sulphur free-cutting steel and production method thereof, mass percents of chemical components thereof are as follows: 29-35% of CaO, 25-30% of Sio2, 2-5% of MgO, 3-5% of Al2O3, 2-6% of Fe2O3, 5-11% of NaO?, 0-2% of Li2O, 5-9% of CaF2?, 0-5% of MnO, 0.5-2.0% of Al grey, 0-2% of B2O3, 5-11% of solid carbon, and allowance is building material adhesive and water. The sulphur free-cutting steel has low high-temperature strength and high crack sensitivity, and the casting powder should have properly high basicity. Basicity of a slag is improved, so that diffusion velocity is accelerated, and absorption of impurities in molten steel is benefited. So, improvement of basicity is an effective means for improving absorption of the impurities and control of surface longitudinal crack.

The invention relates to a continuous metallurgical composite production process for copper-clad aluminum rows. The process comprises a pretreatment step, a continuous coating step, a welding step, acontinuous rolling step, an on-line automatic monitoring step and a diffusion heat treatment step, thereby achieving the following technical effects of: (1) ensuring full uniform combination of coppersheets and aluminum rows, as well as uniform thickness of copper coating; and (2) greatly improving finished-product rate and ensuring yield and quality. Therefore, the production process solves theproblem of producing the copper-clad aluminum rows with various specifications, is particularly applicable to the manufacture of large-size copper-clad aluminum rows, and has huge economic benefit.

The invention provides a three-roller machine, belonging to the technical field of machinery, comprising a rear roller, a middle roller, a front roller, a frame, and a stopper device, wherein the stopper device comprises a barrier strip and a connection assembly, the barrier strip is a straight strip with an inverted V-shaped cross section and is arranged above a line close to the rear roller and the middle roller and parallelly to the respective axis of each roller, the two extended V-shaped edges of the barrier strip are close to the outer cylindrical surfaces of the rear roller and the middle roller, and the connection assembly is connected with the two ends of the barrier strip to fix the barrier strip on the frame. According to the invention, materials can uniformly flow in the rear roller and the middle roller, and various metal objects and hard sundries are effectively prevented from entering between the running rear roller and the middle roller.

The invention discloses a chenille spinning machine for spinning chenille yarns. Firstly, knitting wools for spinning the chenille yarns wind an inverted triangle distance cutting sheet through a high-speed swiveling head, and the width of the neck portion of the distance cutting sheet depends on the length of pile yarns. Subsequently, a pressure roller is fed into a grey yarn rack, two core yarns are discharged, one of the core yarns forms a surface layer core yarn of the chenille yarns, and the other one of the core yarns forms a base layer core yarn of the chenille yarns. The knitting wools on the distance cutting sheet are pushed to blades through roller pieces, the blades move in the middle of the neck portion of the distance cutting sheet, and the knitting wools are cut by means of the blades. The cut knitting wools are sideward clamped between the surface layer core yarn and the base layer core yarn, and flaky knitting wools between the two core yarns are scattered towards all sides to form the chenille yarns through downward use of swiveling of reeling spindles. The chenille spinning machine has the advantages of being convenient to operate, high in production efficiency, large in reeling volume, safe, and reliable.

The invention provides a traction-drive force transmission mechanism and a image forming device equipped with the same. The traction-drive force transmission mechanism, includes a sun roller rotatable about a first axis and a plurality of shafts. Each is disposed on an adjacent axis inclined relative to the first axis. Planetary rollers are disposed along an outer peripheral surface of the sun roller and are supported respectively by the shaft. A carrier holds each of the shafts in the inclined posture and is adapted to be rotated about the first axis together with the planetary rollers. A pressing member pressingly moves each planetary roller in a direction for reducing a distance to the first axis so as to press each planetary roller against the outer peripheral surface of the sun roller. Thus a driving force can be transmitted to a traction force between the sun roller and each of the planetary rollers.

The invention relates to an operating mechanism of an electrical protection apparatus. The operating mechanism comprises a shell and a handle arranged in the shell, wherein a bracket and a lock catch are coaxially and rotationally arranged in the shell; an axial torsion spring is arranged on the bracket shaft, wherein the two ends of the axial torsion spring props against and presses the bracket and the lock catch respectively; one end of the bracket props against a bracket spring while the other end of the bracket spring props against the shell; a bracket end groove is formed in the side wall, propping against one end of the bracket spring, of the bracket; one end of the lock catch extends into the bracket end groove to form an opening-closing hole; the handle is in transmission connection with the opening-closing hole through a U-shaped pushing rod; when the handle is opened, one end of the push rod is locked through the opening-closing hole; when the handle is closed, the push rod is pushed to overcome the locking force of the opening-closing hole to slide to the bracket end groove and to push the bracket to rotate; a moving contact is connected with the relative end of one end, propping against the bracket spring, of the bracket; one end, far from the bracket end groove, of the lock catch props against a sliding block for limiting the rotation of the lock catch; and the sliding block is connected with a thermal releasing apparatus. The operating mechanism of the electrical protection apparatus is simple in structure, low in abrasion and long in service life.

The invention relates to the technical field of a headset structure and discloses a headset connecting structure and a headset. The headset connecting structure is used for connecting a head band and sound production units of the headset and comprises a magnetic sliding arm, a sliding track and a casing covering the periphery of the sliding track, wherein the tail end of the magnetic sliding arm can slide to extend into the sliding track from the head end of the sliding track, the head end of the magnetic sliding arm is fixedly connected with the head band, and the tail ends of the casing are connected with the sound production units; the magnetic sliding arm is covered with a seamless sleeve, and iron-based parts in adsorption matching with left and right sides of magnetic sliding arm are arranged in the sliding track and attached to the seamless sleeve. The headset comprises the head band, the sound production units and the headset connecting structure for connecting the head band and the sound production units. According to the headset connecting structure and the headset, the iron-based parts arranged in the sliding track are in adsorption matching with the magnetic sliding arm movably extending into the sliding track, so that the magnetic sliding arm slides smoothly under the dual actions of magnetic force and frictional force, and the use effect of a user is improved.

The invention provides a rotary assembly. The rotary assembly comprises an upper rotary part and a lower rotary part which are rotationally connected in a sleeved manner, and a pre-pressing part for carrying out pre-pressing to generate friction force is arranged at the sleeved position of the upper rotary part and the lower rotary part. Due to the fact that the upper rotary part and the lower rotary part are rotationally sleeved, the upper rotary part and the lower rotary part can relatively rotate by 360 degrees. Furthermore, the upper rotary part is provided with a connecting part for conveniently adjusting the connecting angle between the upper rotary part and an external fixing part, and the connecting part enables the rotary assembly to rotate by 180 degrees in the vertical plane. In addition, the invention provides a rotary support adopting the rotary assembly and an image pickup device suite adopting the rotary support. The image pickup device suite is easy to install; preferably, an automobile data recorder is adopted as an image pickup device, and due to the fact that the rotary assembly is adopted, the shooting range of the automobile data recorder can be effectively widened.

The invention relates to a polyurethane coating preparation method, which comprises a workbench, a preparation device and a heating device; the preparation device is fixedly installed at the upper end of the workbench, the heating device is fixedly installed at the left end of the preparation device, the preparation device is fixedly installed at the upper end of the workbench, and the heating device is fixedly installed at the left end of the preparation device; the preparation device comprises a heat preservation plate, a cylindrical plate, a feeding pipe, a first motor, a rotating column, a grinding frame, a screening plate, a stirring frame, a screening circular plate, a conical barrel and a discharging pipe. According to the invention, the pigment is ground through the preparation device, and meanwhile, the pigment and a mixed emulsion of polyurethane and auxiliaries are stirred and mixed and are sieved, so that accumulation of pigments is prevented. The polyurethane and the auxiliaries are heated through the heating device, and meanwhile, the heated mixture is screened, so that the situation that solid polyurethane enters the preparation device along with liquid polyurethane, thereby preventing influence on the production quality.

The invention discloses an upper paper guider of a printer, which comprises a mainboard and a star wheel. The star wheel consists of a toothed wheel and a smooth wheel arranged on the toothed wheel by means of injection molding, an elastic shaft penetrates through the star wheel, the star wheel is placed in a mounting groove on the mainboard via the elastic shaft, a press cake is connected onto the smooth wheel of the star wheel in an abutted manner, a groove for holding the toothed wheel is arranged on an end surface of the press cake, which contacts with the star wheel, a compression spring is connected to the top end of the press cake, one end of a compression spring is connected to the top end of the press cake, the other end of the compression spring is connected to the lower side of a pressure plate in an abutted manner, and the pressure plate is fixedly mounted onto the mainboard. The star wheel is elastically fixed onto the mainboard of the upper paper guider, accordingly, the star wheel can be automatically lifted up according to the thickness of a printed medium under the wheel, squeezing force and friction force of a lower paper guiding roller pressing on the printed medium are uniform, abrasion of a rubber ring on the surface of the lower paper guiding roller is reduced, and the upper paper guider is simple in structure, convenient in installation and applicable to equipment such as a laser or ink-jet printer, a copier, a scanner and the like required in printing.

The invention discloses a carbon-ceramic brake disc with a wear-resistant and anti-oxidation coating and a preparation method of the carbon-ceramic brake disc. The preparation method comprises the following steps that grooving treatment is conducted on the upper surface and the lower surface of a carbon/carbon composite material disc body, then coating slurry is brushed in a groove in the upper surface till the groove in the upper surface is filled with the coating slurry, and then the carbon/carbon composite material disc body is turned over, the groove in the lower surface is coated with the coating slurry till the groove in the lower surface is filled with the coating slurry, thus the carbon/carbon composite material disc body containing the coating slurry is obtained, curing, carbonization and ceramization treatment are sequentially conducted, and the carbon-ceramic brake disc is obtained. The preparation process of the wear-resistant and oxidation-resistant coating is simple, large-scale industrial mass production is easy to realize, the coating is bright and smooth in appearance, the bonding strength between the coating and the disc body is high, the size precision is easy to accurately control, and the problem that the size is easy to control inaccurately when the ceramic brake disc is subjected to machining treatment can be effectively solved.

The invention provides a drawer assembly as well as a domestic appliance and a base thereof. Specifically, the drawer assembly comprises a drawer, a drawer chamber, guide rails and at least one supporting piece, wherein the drawer chamber is configured into a containing drawer; the inner wall face of the drawer chamber comprises two side wall faces, and the two side wall faces are opposite to eachother and are not parallel to each other; the two guide rails are respectively arranged on the two side wall faces, and the drawer is connected with the guide rails arranged on the two side wall faces; the supporting piece is arranged between at least one of the two side wall faces and the guide rail arranged on the side wall face; the supporting pieces are configured into supporting guide rails,so that the guide rail arranged on one of the two side wall faces tends to be parallel to the guide rail arranged on the other side wall face. According to the drawer assembly in the scheme, the guide rails arranged at the two sides of the drawer can be installed on the two non-parallel side wall faces in parallel without being restricted by the parallelism between the side wall faces, so that the parallelism between the guide rails at the two sides of the drawer is improved, the drawer is smoother, and the slidable stroke of the drawer is maximized; furthermore, the abrasion of the guide rails is reduced, and the product quality is improved.

The invention provides a sliding frictional force generation mechanism and a manufacture method thereof, a mold buffer device and a metal die. The sliding frictional force generation mechanism can stably exert greater load and is highly endurable and applied to mold buffer of a pressure machinery. A friction mold buffer (15) comprises a shaft sleeve (33) with a friction hole (36), a friction pin (31) embedded to freely slide in an axial direction in the friction hole (36) and a supply system (16) used for supplying lubricating oil as a cooling medium between the friction hole (36) and the friction pin (31). The friction hole (36) and the friction pin (31) are embedded in the state of interference fit. A mold buffer device (10) is in series connection with the friction mold buffer (15) andan air buffer device (12).

The present invention provides an automatic paper feed apparatus which can reliably prevent papers from being discharged in an overlapped state in spite of simple construction. The automatic paper feed apparatus comprises a paper feed roller for automatically feeding a plurality of papers in order from an uppermost one, with the plurality of papers being contained in a cassette in a stacked state. A holding member having flexibility is provided so that the holding member comes into contact with the uppermost paper to generate a friction force that is weaker than that between the paper feed roller and the uppermost paper.

The invention discloses a rubber covered roller of an island structure and a preparation method thereof, and belongs to the technical field of rubber covered rollers. According to the rubber covered roller of the land structure, a rubber layer is prepared by mixing a parent rubber compound and individual particle glue. The elongation of the parent rubber compound is 100-200% higher than that of the individual particle glue, the strength of the parent rubber compound is 4-8MPa higher than that of the individual particle glue, and the Shore A hardness of the parent rubber compound is 8-14 degrees lower than that of the individual particle glue. The preparation method of the rubber covered roller of the island structure comprises the steps of mixing, vulcanizing, crushing, sieving, mixing secondarily, winding and forming, vulcanizing secondarily and turning. According to the rubber covered roller of the island structure, the friction coefficient and the wear resistance of the rubber covered roller can be improved effectively. Influence of the friction coefficient and the wear resistance on performance of a material is eliminated in a using process, and slip, non-uniform stress and nowear resistance and cracking phenomena are prevented.