49results about How to "Low rolling friction" patented technology

The invention discloses a substation secondary wire straightening and bending device and a wire fixing tightness commissioning method. The device comprises a cylinder, wherein supporting legs which are movably connected are arranged at the two ends of the cylinder and a magnet is arranged at one end of each supporting leg. Not only can substation secondary wires be straightened and bent in a batch, but also automatic bending can be realized, the bending tidiness and efficiency are high, the maintenance of a protection screen in future is facilitated, and more importantly, whether the substation secondary wires are firm or not can be conveniently detected.

The invention provides an optical fiber pay-off device which is used in the secondary coating procedure in optical fiber production. According to the technical scheme, an optical fiber is paid off from an optical fiber pay-off disc and guided by a universal wheel, a positioning wheel and a positioning wheel set, undergoes speed regulation conducted by a dancing wheel set and finally enters a sleeve. The universal wheel is supported by a rotatable support provided with a bearing. A universal wheel support rotating shaft center line is kept tangent to a wheel groove inner circle of the universal wheel and a wheel groove inner circle of the positioning wheel at the same time. Therefore, sliding friction force in the whole optical fiber walking route is greatly reduced, only small rolling friction force exists, and the quality of the optical fiber in the sleeve is ensured.

The invention relates to a permanent magnetic levitation auxiliary bearing which comprises two inner magnetic groups and two outer magnetic groups which are symmetrically and oppositely arranged on a shaft sleeve. Each inner magnetic group is composed of an annular inner magnetic solid boot, an inner magnetic ring, a wedge-shaped inner magnetic solid boot and a cylindrical roller which are sequentially arranged from inside to outside in the radial direction. The outer magnetic groups are fixed to the outer sides of the inner magnetic groups through special metal rings in the radial direction. Each outer magnetic group is composed of a wedge-shaped outer solid boot, an outer magnetic body and an annular outer magnetic solid boot which are sequentially arranged from inside to outside in the radial direction. An annular gap is reserved between each wedge-shaped outer magnetic solid boot and the corresponding cylindrical roller. The radial magnetization direction of the inner magnetic rings is opposite to that of the outer magnetic rings. The permanent magnetic levitation auxiliary bearing is in a magnetic levitation state when lightly loaded and has no mechanical friction. On the condition of heavy load, the outer magnetic groups and the inner magnetic groups are in rolling connection with the cylindrical rollers, and the bearing still has the high convolution precision and high bearing strength; in addition, due to the repelling force of the magnetic effect, the pressure of the cylindrical rollers on the wedge-shaped outer magnetic solid boots is greatly reduced, and rolling friction force between the cylindrical rollers and the wedge-shaped outer magnetic solid boots is greatly reduced.

The invention discloses an all-terrain bypass cable automatic laying vehicle, and particularly relates to the field of cable laying. The vehicle comprises a driving vehicle, two supporting frames arefixedly arranged at the top of the driving vehicle, three cable take-up reels are arranged at the top ends of the supporting frames, and a connecting column is arranged between every two adjacent cable take-up reels;fixing pieces are arranged between the connecting column and the cable take-up reel and between the supporting frame and the cable take-up reel. The vehicle is controlled to run and the cable take-up reel is controlled to unwind and wind cables and moisture-proof cloth in a wireless remote control mode, three bundles of cables are loaded on the cable take-up reel on the running vehicle, each bundle of cable bundles can be easily disassembled and replaced, and the cable bundles are installed on the running vehicle and can be driven by the first servo motor to adjust the releasespeed; therefore, the rotation number of the cable take-up reel is adjusted according to laying requirements, the cable release speed is increased, manpower output can be reduced, three-phase circuitlaying can be conducted through single-pass work, operation of constructors is facilitated, the crawler wheels are used for bypass operation without power failure, and it is guaranteed that the traveling vehicle adapts to laying of various terrains.

The invention provides a false twister with adjustable thread tension, which includes a bottom plate, a wire stringing column is fixed on the left side of the top of the bottom plate, a steering device is fixedly installed on the surface of the wire stringing column, and a steering device is fixed on the right side of the steering device. The wire guide frame is fixedly connected. The false twister with adjustable thread tension is provided with a rotating rod, a moving block, a through hole, a gear and a rack. When the rotating rod is rotated, the rotating rod drives the gear to rotate, the gear drives the rack to move, and the rack drives the moving block to rotate. Move, so that the angle of the tensioning device is adjusted, thereby adjusting the tension of the thread, avoiding the thread from breaking easily, and at the same time cooperate with the set chute, driving rod, sliding seat and driving wheel, when the moving block moves, the moving block drives the sliding seat Sliding on the driving rod, the sliding seat drives the driving wheel to roll on the bottom of the chute, making the movement of the moving block smoother and more stable, improving production efficiency and saving production costs.

The invention discloses a multi-operating condition chain tensioning device which aims at overcoming the defects that the chain tensioning device in the prior art needs manual adjustment or the original tensioned edge of the chain in transmission can not be tensioned when changed to the loosening edge during braking and adopting a pressing block to press a chain plate can result in fast abrasion, and provides a tensioning device capable of keeping a chain tensioned under various operating conditions. The multi-operating condition chain tensioning device comprises a pair of brackets and a roller device, wherein the brackets are arranged on a stander and are provided with guide grooves, and the roller device is arranged on the brackets for pressing a chain; and two ends of a roller fulcrum shaft are symmetrically and fixedly provided with two sawtoothed discs which have the outer edge contour gradually extending outwards and are provided with elastic jacking devices which can drive the sawtoothed discs to rotate so as to enable saw teeth to support the edge of a support, and the support is fixedly connected with the stander on which an elastic lifting device capable of being pressed below the roller fulcrum shaft to jack the fulcrum shaft together with the roller to the chain. The multi-operating condition chain tensioning device can keep the chain tensioned all the time under the operating condition of normal transmission or braking, and can reduce the abrasion of the chain by using the roller to jack the chain.

The invention relates to an abrasive disc type wire and cable assistance paying-off device for 1-10kV mesolow wires or cables. The abrasive disc type wire and cable assistance paying-off device structurally comprises an abrasive disc type paying off rack and an assistance device, wherein a rotary bearing shaft is arranged on the abrasive disc type paying off rack, and a cable drum is sleeved on the rotary bearing shaft; and a cable leading-out end on the cable drum is arranged between conveyer belts of the assistance device. By adopting the abrasive disc type wire and cable assistance paying-off device, the problems that a lot of manpower is required, the paying-off process is time-consuming and labor-consuming and the like when lines are constructed and cables are paved are solved, the influence of the ground to the paying off rack is eliminated, and the paying-off direction is convenient to control; and due to the assistance device and a control device, the friction force between the cables and the ground surface is reduced, so that the paying off process is time-saving and labor-saving and easy to control, can be finished by two persons, and a lot of manpower is saved.

The invention discloses a cable bridge with an anti-wear function. The cable bridge comprises a shell and anti-friction wheels arranged on the bottom plate of the shell, wherein the anti-friction wheels are arranged sequentially along a wiring direction; each of the anti-friction wheels includes a rotating wheel, a rotating shaft and upright columns which are arranged at the left side and right side of the rotating wheel; the bottoms of the upright columns are fixed onto the bottom plate of the shell; the tops of the upright columns are provided with bearings; the rotating shaft passes through the rotating wheel along the central axis of the rotating wheel; the left end of the rotating shaft is connected with the bearing on the left column; the right end of the rotating shaft is connected with the bearing arranged on the right column; and the central axis of the rotating wheel is perpendicular to the wiring direction. With the cable bridge of the invention adopted, the sheath of a cable can be prevented from being worn and damaged, so that the cable can maintain a good stress balance inside the bridge and is convenient to disassemble.

The invention discloses a sawing machine provided with a high-precision saw blade positioning device. The sawing machine comprises a saw blade, a saw blade transmission device and the saw blade positioning device, the saw blade positioning device abuts on the saw blade to enable a saw blade cutting area to be vertical, and comprises an upper positioning wheel and a lower positioning wheel, and the upper positioning wheel and the lower positioning wheel with wheel faces abutting on the saw blade are arranged at the upper end and the lower end of a support frame respectively. The sawing machine is simple in structure, the positioning device is high in precision, rolling friction force of the saw blade and the upper and lower positioning wheels is small, the upper and lower positioning wheels are free of wear and shaking after long-time use, the saw blade in the cutting area is in an optimal vertical tensioning state constantly, left-right eccentricity can be avoided during operation of the saw blade, sawn wood lines hardly have any deviation, and the sawing machine is more obvious in advantages particularly when used for making veneers, and is cost-saving and high in production efficiency.

The invention relates to a reciprocating displacement type fatigue testing machine. The reciprocating displacement type fatigue testing machine comprises a tested steel beam, an acting wheel, a connecting bar, a double-acting oil cylinder, an oil cylinder support, a lifting rod, a load gravity block, a working platform and a hydraulic pump, wherein the acting wheel is connected with one side of the double-acting oil cylinder by the connecting bar; the double-acting oil cylinder is connected with the oil cylinder support and connected with the hydraulic pump; the hydraulic pump is connected with a control system; one end of the lifting rod is connected with a wheel axle of the acting wheel; the other end of the lifting rod is connected with the load gravity block; the acting wheel is positioned above the tested steel beam; and the load gravity block is inserted into a spatial position in the working platform. By using the reciprocating displacement type fatigue testing machine the restriction that the traditional fatigue testing machine only can test the positive stress variation induced fatigue is overcome and the bearing capability of the fatigue caused by bent member web shear stress inversion can be detected. The reciprocating displacement type fatigue testing machine provided by the invention has the following advantages that: the position of the acting force moves in a reciprocating way while the size and direction of the acting force is invariable; and the acting force is realized by a lifting rod pressurizing weight and small thrust and low testing energy consumption are required in the double-acting oil cylinder for driving the acting wheel.

The invention provides a magnetic suspension bearing comprising an inner ring, an outer ring and a retainer, wherein a annular closed magnet is made of neodymium iron boron to form the mutual repulsion between the inner ring and the outer ring, the contact faces of annular closed magnet and the inner ring and the outer ring are homopolar, a plurality of fixed bayonets are also arranged on both sides of the inner ring, are made of magnetic metal and have the same magnetic poles with the outer surface of the outer ring, and the outer edges of the bayonets are clamped on the outer surface of the outer ring and fix the outer ring. The magnetic suspension bearing has the advantages that by utilizing the principle of homopolar repulsion of a magnetic material, the magnetic material is applied to the bearing so that the inner ring and the outer ring of the bearing generate mutual repulsion to generate the function of suspension, and therefore, the magnetic suspension bearing greatly reduces the contact rolling friction force between members and enhances the rotating speed.

The invention discloses portable nursery stock low-damage moisture rapid detection equipment and a detection method. The equipment comprises a pull rod telescoping mechanism and a detection mechanism,wherein a connecting plate is arranged between the pull rod telescoping mechanism and the detection mechanism; a mounting plate is arranged between the pull rod telescoping mechanism and the bottom of the detection mechanism; the pull rod telescoping mechanism comprises a main box body, a rotating shaft is arranged between the inner walls of the main box body, a two-way threaded rod is arranged on the outer surface of the rotating shaft, two symmetrical threaded sleeves are in threaded connection with the outer surface of the two-way threaded rod, connecting blocks are fixedly installed at the bottom of the threaded sleeves, and a sliding groove is formed in the inner bottom wall of the main box body. Moisture of a detection sample can be quickly dried and evaporated through an infrared baking lamp, and meanwhile, light rays can be focused on the top surface of the supporting plate through the plurality of reflectors, so that the moisture drying speed is increased.

The invention provides a lifting cable wire sliding device. The lifting cable wire sliding device comprises a coiling block with a motor, a guide rail and pulleys, wherein the coiling block is connected with a left pull steel cable and a right pull steel cable, the left pull steel cable is connected with one end of a track through a left pulley, the right pull steel cable is connected with the other end of the track through a right pulley, the guide rail is arranged on the V-shaped track, the pulleys are arranged on the guide rail and connected with connecting pieces through pulley shaft installing shafts, a cable is arranged at the bottoms of the connecting pieces, and the cable is connected to a drag cable. According to the lifting cable wire sliding device, the connecting pieces for installing the cable are arranged on the V-shaped track through the two pulleys, the rolling friction force is reduced, the cable is convenient to drag, on the track, the left pull steel cable and the right pull steel cable are connected to the track, the track can freely ascend and descend under driving of the motor, and different usage requirements are met.

The invention relates to a trolley. The trolley comprises a trolley body and wheels, wherein the trolley body comprises a base, a frame and a pushing rod arranged on the frame; the base is arranged on the wheels; the frame comprises a frame body, a seat and a pedal plate; each wheel comprises a rotating shaft, a rim and an annular rotating part; the rotating shafts are arranged at the bottom of the base; each rim sleeves the corresponding rotating shaft; each annular rotating part sleeves the periphery of the corresponding rim; and a plurality of friction strips are arranged on the surface of each annular rotating part. The height of the seat is adjustable, and the wheels cannot slip easily.

The invention discloses a connecting and fixing method for a lining die of a high bridge pier roller die. The technical scheme includes that a connecting and fixing device comprises equilateral angle steel, mounting notches and a rubber lining, wherein the equilateral angle steel wraps the high-density rubber lining, and the high-density rubber lining comprises the rubber mounting notches and an inner curved surface. During template splicing, a lining template is mounted in the rubber mounting notches of the device, the equilateral angle steel is positioned on the outer side to contact with a wheel axle directly, and the inner curved surface is positioned on the innermost side and contacts with concrete directly. The chamfer connecting and fixing device for the lining die of the high bridge pier roller die has the advantages that the device is portable, flexible to move, convenient to mount and excellent in connecting and fixing effects, mounting of the lining template is accelerated, the lining die at a chamfer position of a pier is convenient and compact to connect during roller die construction, the problem that the macromolecular resin lining die at the arc-shaped chamfer position of the pier is difficult to fix and connect is solved, construction progress can speed up, pier concrete appearance quality is guaranteed and economic benefit created by roller die construction is improved.