457results about How to "Smooth rolling" patented technology

The present invention relates to a cordless braking system for a mobility-aiding device, such as a wheeled walker (a rollator) or a transport chair. The cordless braking system includes a brake actuating linkage, disposed inside the leg and handlebar members of the mobility-aiding device, which extends during height adjustment of the handlebars. The brake-actuating linkage and the leg/handlebar of the mobility-aiding device are designed to enable a locking pin or bolt to extend all the way therethrough to ensure that all of the height-adjustable members are secured together during use.

Structure for securing a load detection element under a vehicle seat in combination with a support leg element having a hole formed in one end portion thereof, wherein the load detection element is pivotally connected with the support leg element, while being fixedly secured by first and second securing pins to the vehicle seat. The first pin has an end riveted to a bottom side of the vehicle seat and an end portion extending through the hole of support leg element. Such another end portion has a head larger in diameter than that hole and is disposed outwardly under the support leg member, with one space given between the head and support leg member. The second pin has a end fused and fixed in the bottom side of vehicle seat and a head disposed beneath the load detection element, with another space given between the head and support leg member.

The invention discloses a ball flat iron production technique, comprising steps of billet, heating, symmetrical rolling, straightening and dissection. The invention is characterized in that the dissection process is carried out after the processes of symmetric rolling and straightening; hole shapes in all the passages of a rolling mill are constituted by two ball flat iron hole shapes which are symmetrically identical. By adopting the technique of symmetric rolling, the invention solves the problems that existing large and medium rolling mills can not produce small ball flat irons with symmetrical rolling and dissection technology. The invention has the advantages of the small size fluctuation of profiles when producing, particularly the small size fluctuation of width, thickness, ball filling and the lower arc of the ball flat iron, rollers subject to uniform forces, easy control in rolling process, greatly reducing the scraping, the rolling mark and the waves of the product by 50% to 70%, improving the quality of the product, enlarging the types of rolled products, leading large profiled bar rolling mill to produce small ball flat iron, enlarging the profile of the billet, large corresponding compression ratio, improving the comprehensive performance of the products, etc.

The invention discloses a rotary feed crushing and drying device including a machine body; a crushing screen cylinder is arranged in the machine body, a knocking device is arranged on the left side ofthe crushing screen cylinder, and a drying conical cylinder is arranged below the crushing screen cylinder. According to the rotary feed crushing and drying device, a crushing knife and a crushing screen cylinder with a periodic square rotation are used to fully smash and screen feed, thereby improving the efficiency of smashing and screening. The knocking device linkaged with a rotary shaft canknock the outer wall of the crushing screen cylinder, and the clogging of screen holes and the feed residues can be avoided. The drying conical cylinder with a cone structure and an annular stock guide are used to enable the feed to roll down uniformly on the surface of a drying screen cylinder, the feed is evenly dried, a spiral raised line is provided to increase the falling time of the feed, and the drying effect is ensured. According to an arc-shaped feed discharging scraper and a feed discharging pipe which is in tangential communication with the machine body, the feed discharging efficiency is increased, so that the feed discharging is more thorough.

The invention relates to a rolling device for preparing a high-toughness high-formability magnesium alloy sheet strip coil and belongs to the field of metal material rolling. The rolling device provided by the invention comprises a rolling machine, an uncoiling machine, a left-right recoiling machine, a front online heating insulating device of the roll machine, a rear online heating insulating device of the roll machine, a straightening machine, a bending rectifying machine, a thickness measuring device, a steering tension roll, a guide roll, a roller heating and lubricating device and the like. In the invention, an online continuous heating device and an advanced PLC (programmable logic control) feedback control system are adopted, and continuous temperature control rolling on the magnesium alloy strip coil is realized. The rolling device provided by the invention has the advantages of uniform heating temperature, high heating efficiency and high temperature control accuracy, and high-quality thin wrought magnesium alloy strip coils are efficiently produced by virtue of a roller preheating insulating system, a technical lubricating system, a strip shape control system and a tension straightening device, thus the geometric quality and structure properties of rolled metal can meet operating requirements.

The invention provides ultra-high strength steel with yield strength level of 1100MPa-1200MPa and a production method of the steel. The chemical constituents (weight percentage) include: 0.15-0.18% of C, 0.20-0.25% of Si, 0.85-1.25% of Mn, 0.20-0.60% of Cr; and 0.45-0.65% of Mo, 0.035-0.060% of V, 0.015-0.020% of Nb, 0-0. 55% of Ni, 0-0.035% of Cu, 0.01-0.06% of Al, no more than 0.015% of P, no more than 0.01% of S, no more than 0.008% of N, the balance of Fe and unavoidable impurities. The production method includes: smelting and casting into casting blank; and heating the casting blank to 1150-1250 DEG C, wherein the final rolling temperature is 860-920 DEG C, the coiling temperature is 650-750 DEG C, the quenching heating temperature is 880-930 DEG C, the thermal insulation time is 20-90min, the tempering heating temperature is 100-450 DEG C, the thermal insulation time is over 90min. Slow cooling or air cooling is conducted to room temperature. For the steel plate produced with the constituents and the technology, the yield strength is 1150-1230MPa, the tensile strength is 1250-1340MPa, the elongation is 11-13.5%, and the impact power value at minus 40 DEG C is 21-34J.

An external circulation type ball screw is provided with a helical passage in the outer surface of the nut. The helical passage and the inner helical groove of the nut are opposite in winding direction to each other. The nut is defined with two through holes which are connected to both ends of the inner helical groove and the helical passage, respectively, so that the helical passage and the inner helical groove are connected to each other to form a circulating path for the circulation of the balls. Since the helical passage winds about the outer periphery of the nut, the balls can roll more smoothly.

The invention relates to a method for simultaneously rolling and expanding two trapezoid-cross-section flange ring forge pieces. The method comprises cutting a cylindrical billet into material sections; heating the material sections from room temperature to austenitizing temperature evenly and keeping warm; then heading, punching and chambering the material sections to be manufactured into ring piece blanks to be rolled and expanded; baking again and heating the obtained blanks to reach target temperature and keep warm; placing the obtained blanks into a hole mould of a ring rolling machine formed by an irregular-shaped driving roller and an irregular-shaped core roller to be rolled, expanded and formed; achieving the ring forge pieces which is narrow at two ends and wide in middle and with the axial height as twice as the height of a target trapezoid flange; cutting the ring forge pieces from the middle of the axial height, symmetrically dividing a work piece into two parts to obtain two trapezoid-cross-section flange ring forge pieces; and finally turning the forge pieces into end product flanges. The method for simultaneously rolling and expanding two trapezoid-cross-section flange ring forge pieces is high in production efficiency, energy-saving, environmental-friendly and capable of improving utilization rate of raw materials and quality of products.

A needle roller bearing comprises an outer ring having a plurality of outer ring members split by split lines extending in the axial direction of the bearing, and a plurality of needle rollers arranged on the track surface of the outer ring so that they can roll. The outer ring is split by a load applied to its end surface in the direction crossing the end surface.

The invention discloses a spherical robot having a bionic walking function. The spherical robot comprises a spherical shell module, a rolling driving module, a foot module, a supporting module and a foot balance module. The spherical robot disclosed by the invention has two basic movement modes of spherical rolling movement and foot type walking movement, so that the spherical robot has high movement efficiency of spherical rolling and good terrain adaptability of foot type walking, and can also enable the two movement modes to supplement each other, and the obstacle surmounting performance of the spherical rolling and the movement efficiency of the foot type walking are improved.

A ball exerciser includes a deformable rolling body having an outer surrounding wall surface and at least one lateral mount wall, a rigid stationary coupling member secured to the lateral mount wall and having a stationary coupling end distal from the lateral mount wall, a movable coupling member having a movable coupling end disposed to be swivelable and frictionally rotatable relative to the stationary coupling end about a rolling axis, a grip including a grip segment which is spaced apart from the lateral mount wall and which is coupled to the movable coupling end so as to permit the grip segment to swivel with the movable coupling member.

An office chair caster has a wheel holder, a wheel body, a spindle seat and a spindle. Make a first base and a second base oppositely joined together to form the wheel holder with retaining pieces of the second base inserted into fitting slots of the first base, and make the spindle seat that is extended through by the spindle inserted into through holes of the first and second bases with engagement protuberances of the spindle seat aligned with engagement grooves of the second base. The spindle seat can be rotated at 90 degree to make the engagement protuberances impelled over projections of the first base, stopped by stop blocks of the first base, engaged in sliding slots of the second base, and limited between the projections and the stop blocks without moving, thereby the spindle seat can be firmly fixed in the wheel holder to hold the spindle securely.

The invention relates to a soybean pulverizing device, in particular to a soybean pulverizing device for pre-production of soybean milk and aims at achieving the technical purpose of providing the soybean pulverizing device for pre-production of the soybean milk, wherein the soybean pulverizing device is easy to operate, uniform in grinding and high in work efficiency. To achieve the above technical purpose, the soybean pulverizing device for pre-production of the soybean milk is provided and comprises a bottom plate, a sliding block, a sliding rail, a right side plate, a first disc, a first motor, a fixed plate, an air cylinder, a supporting rod, a guiding plate, a pull wire, a left side plate, a weight block, a crushing box, a valve, a discharging pipe, a movable plate, a lifting rod, a spring, a fixing block, a contact wheel, a wedge block, a connecting rod, a push block, a first connecting rod, a second connecting rod, a third connecting rod, a second motor and a second disc, and the bottom plate is provided with the left side plate, the sliding rail and the right side plate from left to right. The soybean pulverizing device achieves the effects that operation is easy, grinding is uniform, and the work efficiency is high.

A method of manufacturing an annular material includes: a forging process of making a discoid forged material by forging an alloy material; and a ring rolling process of making an annular material by performing ring rolling on an annular intermediate made by forming a through-hole in the forged material. In the forging process, hot forging which achieves an absolute value εθ1 of a strain in a circumferential direction of the forged material that is greater than or equal to 0.3, an absolute value εh of a strain in a height direction of the forged material that is greater than or equal to 0.3, and a ratio εh/εθ1 between the absolute values of the strains that is in a range of 0.4 to 2.5 is performed at least two or more times.

A putter head includes substantially parallel plural grooves formed on a face thereof, wherein a ratio W/S of a groove width W (mm) and a space width S (mm) between the grooves is from 0.5 to 2.0.

A deflector (45b) of a nut (45) scoops up balls (65) from rolling raceways (23b, 45f) to a tangential direction of the rolling raceways, in the direction of a lead angle. As a result, the balls (65) are scooped up to a circulation path (45c) with their direction of rolling unchanged, so that smooth rolling can be achieved, and operation noise and vibration can be suppressed to low levels.

The present invention is a soccer training system for holding and retrieving a soccer ball including a detachable tether mechanism that is capable of easily switching between being ground-mounted, hand-held, and belt-mounted, depending on what practice skills are desired. The invention is an incorporated kicking, shooting, dribbling and juggling soccer training device that simulates real soccer play.

A linear motion guide unit is envisaged smooth transfer of a roller from a turnaround passage to a return passage and vice versa across a joint between the turnaround passage and the associated return passage. Protrusions extending stepwise from an end of the turnaround passage come into complementary fit joints with an associated end of a tubular member defining the return passage to make wall surfaces to guide axially opposite ends of the roller, in which the joints are staggered or different in their locations between wall surfaces. The return passage is defined with a fore-and-aft hole of rectangular shape in transverse section inside a tubular member that fits into a bore made in the carriage. The tubular member is joined at lengthwise opposite ends thereof together to the protrusions that are raised above end surfaces of the end caps to extend the turnaround passage into the bore. Edges of the protrusions come into complementary fit joints with the associated ends of the tubular member to provide wall surfaces to guide axially opposite ends of the roller.

The invention relates to a chromium-containing high silicon steel strip and a preparation method thereof. According to the technical scheme, the high silicon steel strip contains 5.5-7.0wt% of silicon and 0.05-10.0wt% of chromium, and the balance of iron and inevitable impurities. The preparation method comprises the following steps: preparing raw materials including technically pure iron, commercial silicon and pure chromium according to the chemical components of the chromium-containing high silicon steel strip; smelting the raw materials by employing an intermediate frequency vacuum induction furnace, casting into a casting blank under the condition of 1250-1650 DEG C, forging the casting blank into a plate blank with the thickness of 10-20mm under the condition of 800-1250 DEG C, and performing hot rolling on the plate blank to form a strip with the thickness of 0.6-0.8mm under the condition of 700-1250 DEG C; and finally, performing warm rolling till the thickness of the strip is 0.2-0.3mm under the condition of 1507-50 DEG C. The method has the characteristics of low cost, simple process and utilization of existing equipment, the brittleness of the prepared chromium-containing high silicon steel strip is obviously improved, the plasticity is obviously improved, and the plate shape is good.

The invention discloses a production method of a wind tower flange deformed ring forging. The wind tower flange deformed ring forging is made of billet by the steps of blanking, blank forging and ring rolling, heating treatment and finish turning. The step of blank forging and ring rolling comprises the steps of: firstly rolling the billet into a ring by a plain barreled roll, wherein the inner wall of the ring is a smooth circumferential surface; and then heating in a furnace; rolling the ring into a workpiece with an annular concave cavity in the middle of the inner wall by a deformed core roll, wherein the deformed core roll is provided with a core roll boss, the core roll boss is twice wider than the connecting face of a tower cylinder of the wind tower flange deformed ring forging, and the height of the core roll boss is equal to the width of a flange connecting boss of the wind tower flange deformed ring forging; and sawing the workpiece from the middle of the side to separate the workpiece into tow parts symmetrically and equally to obtain tow blanks of the wind tower flange deformed ring forging. The invention is a production method of the wind tower flange deformed ring forging, which can improve product quality and has high production efficiency.

A roller chain is provided, which is composed of more than one roller and a carrier belt. The roller chain helps make sure of keeping the rollers against moving on the skew even under carrying high loads while the carrier belt is made to have a large space to reserve lubricant sufficient to ensure good lubrication. The carrier belt is comprised of a pair of continuous bands lying to carry or bear axially opposite ends of the roller across an area set off-centre from an axis of the roller, and more than one U-type separator to join the continuous bands together with one another. The U-type separators 6 are each composed of a pair of legs joined together with their associated continuous bands, and a horizontal bridge interconnecting the sidewise spaced leg with each other.