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

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 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 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 pressedbelow 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 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 discloses a portable joint bearing rolling and closing device. The device mainly comprises a positioning base, a rolling head, a tightening nut and steel balls; the positioning base is provided with a boss for fixing a bearing base to guarantee the fixing firmness of the bearing base; the rolling head is a rolling force applying part; a hexagon is designed in middle of the rolling head for conveniently applying force in use; semicircular grooves are designed on the upper and lower surfaces of the rolling head; the groove on the upper surface cooperates with the tightening nut, and the steel ball is placed in the groove, so that the tightening nut is not rotated along with rotation of the rolling head; the groove on the lower surface cooperates with the bearing base, and the steel ball is placed in the groove; and the steel ball achieves the effects of rolling and closing during moving to fix a joint bearing in the bearing base. The device is simple in structure, smaller in part size, low in weight and convenient to carry; and in particular, the portable joint bearing rolling and closing device can achieve preferable effects on outer field operation and repair.

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 relates to a semi-magnetic suspension type engine. The body of the engine is connected with an industrial computer, wheels are connected with wheel springs, and each wheel spring is connected with a stress sensor, wherein the industrial computer is respectively connected with each stress sensor through four paths of sensor lines. A chassis of the engine body is provided with a lifting device, and the upper part of the lifting device is connected with the industrial computer through a lifting device line. The tail end of the lifting device is connected with a permanent magnet of the chassis of the engine body, and a track permanent magnet of which the width is equal to that of the permanent magnet of the chassis of the engine body is continuously distributed between two tracks, wherein the polarity of the permanent magnet of the chassis is opposite to that of the track permanent magnet which is continuously distributed between the two tracks. The permanent magnet of the chassis and the track permanent magnets are both made of strong permanent magnetic materials with high coercive force and high residual magnetism. The semi-magnetic suspension type engine has simple structure, and the load gravity of the engine body is counteracted by the repulsion force of two magnets so as to reduce the rolling friction of the wheels and steel rails. The state of a train is equivalent to that of empty running, thereby the semi the magnetic suspension type engine prolongs the service life of the steel rails, the wheels and the springs.

The invention provides a sliding vane assembly, a compressor and an air conditioner. The sliding vane assembly includes: a sliding vane body; a needle roller groove is arranged on the sliding vane body, and needles are installed in the needle roller groove; At least one end of the groove wall is provided with a limit structure, the limit structure is used to limit the needle roller in the needle roller groove; the slide body is also provided with a cutout, and the cutout is used to remove the needle roller groove at the place where the limit structure is not set. The groove wall reduces the contact area between the needle roller groove and the needle roller. The slide assembly of the present invention reduces the resistance effect of the inner wall of the needle groove to the rolling of the needle, improves the rolling efficiency of the needle, reduces the rolling friction force between the slide and the roller, and reduces the friction loss of the needle. The new ceramic needle roller improves the wear resistance and self-lubricating performance, and avoids the occurrence of adhesive wear between the sliding plate, needle roller and roller. The diamond-like graphite-nitride composite coating in the needle groove has good self-lubrication and strong wear resistance, which improves the long-term operation reliability of the slide.

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 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.