64results about How to "Control friction" patented technology

The invention discloses a floating barrel duckbilled lotus root digging machine, which comprises a chassis frame (14), a power water pump room (9), a pump fixing frame (10), a water inlet pipe (7), a high-pressure tube (8) and a high-pressure nozzle (3), and is characterized in that: the lotus root digging machine is provided with left and right sealed floating barrels (1); a working bin (11) is arranged between the left and right sealed floating barrels (1); bottom, front-back and top filtering nets (2, 4 and 16) are welded outside the working bin (11) and between the left and right sealed floating barrels (1); and the chassis frame (14) is welded with the left and right sealed floating barrels (1), the working bin (11), the pump fixing frame (10), an operating frame (6) and a lifting lever (15) into a whole. The lotus root digging machine is novel in structure, light and flexible in complete machine, low in manufacturing cost, easy to operate, high in efficiency, low in fault rate, easy to maintain, convenient to transfer and wide in application.

The invention relates to an electromagnetic controllable mechanical brake parking device which comprises action arms, an action arm installation seat, cylindrical compression springs, electromagnetic iron components and abrasion pieces. Two action arms are respectively connected on an upper end and a lower end of the action arm installation seat in a rotation mode, the cylindrical compression springs are arranged between the two action arms, two ends of each cylindrical compression spring are connected with the action arms on the upper side and the lower side respectively, the electromagnetic iron components are arranged inside the cylindrical compression springs and connected with the action arms on the upper side and the lower side, and two abrasion pieces are respectively arranged at the other end of each action arm. Compared with the prior art, electricity amount of the electromagnetic iron components is controlled to control frictional force among the abrasion pieces and a steel rail so as to achieve braking or parking of a vehicle, the abrasion pieces are compressed on the steel rail, most thermal load is born by the steel rail, the position of the vehicle is continuously moved, heat generated by the braking is rapidly dissipated on the steel rail, and the electromagnetic controllable mechanical brake parking device is suitable for being used for continuously-implemented brake of the vehicle on long-distance downhill.

A nano-porous material energy absorption structure packaged by high polymer materials comprises one-layer or multi-layer polymer material outer shell and nano-porous material mixed liquid packaged in the polymer material outer shell. The nano-porous material mixed liquid is formed by the fact that nano-porous materials and non-infiltrating liquid are mixed, and the maximum mass ratio of the nano-porous materials and the non-infiltrating liquid is 3:1. The nano-porous material is zeolite or porous silicon earth or nano-porous metal or nano-porous metal oxides or a carbon nano tube or activated carbon or nano-porous polymer materials. The non-infiltrating liquid is water or an inorganic salt solution or an organic solution or an oil-based solution or liquid metal or a rubber matrix. The polymer material outer shell is made of rubber or polyethylene or chloroethylene. According to the nano-porous material energy absorption structure packaged by the high polymer materials, energy is converted into solid-liquid two-phase surface tension, friction force and deformation energy of the polymer materials, so that energy absorption is effectively improved, the structure is simple, meanwhile, the weight is relatively low, and mass production and application are facilitated.

The invention discloses a 3D printing melt extrusion shower nozzle, which comprises a printing head, a driving roller, a driven roller, a heater and a motor, wherein the motor is in transmission connection with the driving roller; an extruding space allowing printing materials to enter is formed between the driving roller and the driven roller; the printing head comprises a main body part provided with a cylindrical cavity, a cone-shaped part connected to the bottom end of the main body part and provided with a cone-shaped cavity, and an ejecting part connected to the bottom end of the cone-shaped part and provided with a cylindrical cavity; and the heater is arranged at the outer side of the main body part in a winding manner. The 3D printing melt extrusion shower nozzle has the advantages that the ejecting part provided with the cylindrical cavity is arranged at a nozzle of the printing head, so that the control precision is high; through the arrangement of a temperature sensor, the temperature of a heating cavity can be controlled in real time, so that the materials can be evenly extruded; and an extruding spring is arranged between the driven roller and printing materials, so that the friction force between the printing materials and the driven roller can be controlled, and the control precision is improved.

The invention belongs to measuring methods for magnetic nano materials and magnetic-nanostructure device transport properties, particularly relates to a scanning electron microscope magnetic resistance measurement sample stage and a nano single magnetic transport property measuring instrument. The scanning electron microscope magnetic resistance measurement sample stage comprises a base, a rotator, a nut-shaped clamping stage, a rotating shaft and a sample stage, the base is provided a cylindrical outside, screwed grooves are formed on the inner walls of the base, a piezoelectric pile is arranged inside the base, the rotator is arranged on the base and connected with the same through the rotating shaft, the clamping stage is connected with the rotating shaft and the rotator, and the sample stage is arranged above the clamping stage. The biggest innovation of the scanning electron microscope magnetic resistance measurement sample stage is that, for the first time throughout the world, a magnetic field is introduced into a scanning electron microscope, so that real-time, dynamic and visualized magnetic transport property in nano spaces can be measured, and fixed, rapid, visual and whole-process monitoring and petrophysical property measuring can be realized.

The invention discloses a portable flat panel television bracket, which is characterized by comprising a main panel and a support plate, wherein the support plate is arranged on the back of the main panel through a support plate rotating mechanism, can rotate and separate relative to the main panel, and stands in a herringbone together with the main panel. Compared with the conventional clumsy flat panel television bracket with a base, the portable flat panel television bracket has a more light structure, is easy to carry and convenient to use, is quickly unfolded and folded particularly, is suitable for small meetings or exhibition occasions requiring a flat panel television for exhibition, and has high practicability.

The invention discloses a manipulator for a drill floor. A horizontal moving guide rail is fixedly connected with the surface of the drill floor, a rotary bearing is installed on the horizontal movingguide rail, and a vertically arranged vertical moving guide rail is connected with the rotary bearing. A moving slide block is installed in the vertical moving guide rail, and the vertical moving guide rail and the moving slide block are correspondingly and fixedly connected to the fixed end and the movable end of a first oil cylinder. The moving slide block is hinged to the bottom of an inn moving arm, and the fixed end and the movable end of a second oil cylinder are correspondingly hinged to the middle and low parts of the moving slide block and the inner moving arm. The top of the inner moving arm is hinged to the top of the upper part of a moving arm, the fixed end of a third oil cylinder is hinged to the upper part of the inner moving arm, and the movable end of the third oil cylinder is hinged to the middle of the upper part of the moving arm. The manipulator can realize the automation of main work such as the movement of a pipe column of the surface of the drill floor, the buffering when the pipe column enters the drill floor to reach a wellhead and the rattling of the pipe column (drill pipe), and the problems that the current movement of the pipe column of the drill floor depends on manpower and multiple devices to work dispersedly are solved.

The invention discloses a corrugated board rolling shaft power gluing device. The device comprises a workbench, wherein a gluing roller is arranged in the middle of the workbench in a penetrating mode, the two ends of the gluing roller are connected with shaft parts, the shaft parts are connected with the inner wall of the workbench through first bearing seats, a large hand wheel is welded to oneset of shaft parts, a base is arranged at the bottom of the workbench, a circle of conveying belt wraps the base, a corrugated board is fixedly placed on the upper end face of the conveying belt, a rotating rod is transversely and rotationally arranged in the base, and one end of the rotating rod is connected with the inner wall of the base through a second bearing seat. According to the corrugated board roller power gluing device, the friction acting force between a corrugated board and the gluing roller during moving is used as power, a glue supply box supplies glue intermittently through transmission and cam movement, a glue pump is avoided, the cost is reduced, and the device is suitable for different working conditions and has a better use prospect.

The invention discloses a device and method for coaxially assembling a gyrotron body and a magnet. The method comprises: a driving coil is wound around the gyrotron body inside a gyrotron magnet; whenthe driving coil is energized, the electromagnetic force of a magnetic field inside the gyrotron magnet acts on the driving coil, and the current direction of the driving coil is opposite to the current direction of the gyrotron magnet, and the magnetic field distribution inside the gyrotron magnet is configured such that from the magnetic axis of the gyrotron magnet to the inner wall of the magnet, the intensity of the magnetic field gradually increases; according to the left-hand rule of an energized coil in the magnetic field, the resultant force of the electromagnetic force acting on thedriving coil is directed to the magnetic axis direction, so as to drive the gyrotron body to move toward the magnetic axis direction, so that the axis of the gyrotron body coincides with the magneticaxis of the gyrotron magnet. The method enables the gyrotron body to perform a damping motion under the driving of the electromagnetic force acting on the driving coil, and finally makes the axis of the gyrotron body and the magnetic axis of the gyrotron magnet substantially coaxial with each other.

The invention discloses an automated guide rail loopback system for a railway track laying machine, which comprises a host and an auxiliary engine. The automated guide rail loopback system for the railway track laying machine is used for operating two parallel guide rails. The host comprises at least one host control console, two first buffer devices, a host car body, two first car sealing devices, a plurality of first main carrier rollers and a plurality of first auxiliary carrier rollers; and the auxiliary engine comprises at least one auxiliary engine control console, two second buffer devices, an auxiliary engine car body, two second car sealing devices, a plurality of second main carrier rollers and a plurality of second auxiliary carrier rollers. According to the automated guide rail loopback system for the railway track laying machine, which is disclosed by the invention, a guide rail loopback function is finished in a mechanized operation mode, the traditional manual construction working method is changed, the labor intensity of construction and operation personnel is lowered, the guide rail is protected from deformation, and the operation security risk is lowered.

A bench with air cushion is composed of a top surface with multiple holes, sequentially connected multiple air nozzles inserted selectively in said holes, multiple time controllers, and air pressure controller, an air quality controller, and an air source. It can generate an air cushion to support the workpiece on the bench, so decreasing the friction.

A locking device for preventing an elevator from accidentally falling is used for safety protection for preventing the elevator from accidentally falling in the running process of the elevator and belongs to the technical field of manufacturing of auxiliary equipment for preventing the elevator from accidentally falling due to faults. The locking device comprises a gearbox and speed limiting mechanisms. Two gears which are engaged are rotationally arranged in the gearbox, and gear shafts of the gears are horizontal. Obliquely-downward connecting rods are fixedly connected to the positions, away from the engagement position, of the gears, the middle points between the two ends of the connecting rods are hinged to the tail ends of traction ropes of the speed limiting mechanisms, the ends, away from the gears, of the connecting rods are rotationally connected with sliding blocks, and the sliding blocks are connected with elevator guide rails in a sliding manner. By means of the locking device for preventing the elevator from accidentally falling, the manner that the gears are connected with the connecting rods is adopted, the elevator is prevented from falling accidentally in the manner of applying force through the connecting rods and increasing the friction force between the sliding blocks and the elevator guide rails, and the problem that an existing elevator safety anti-falling device is likely to be disturbed by external conditions due to the fact that electrical elements are adopted is solved.

The invention relates to a segment cutting device of an adjustable flexible plate. The segment cutting device comprises a material conveying device, a traction device and a cutting device, wherein the material conveying device, the traction device and the cutting device are connected in sequence; the traction device comprises a feed roll shaft and a fourth straight gear which is movably installed on the feed roll shaft; the cutting device comprises a power roll shaft which is connected with an engine, a first straight gear is movably installed on the power roll shaft, a second straight gear is movably installed on an idler shaft, a third straight gear is movably installed on a cutter roll shaft, and the cutting device further comprises a fixed cutter which is installed on a cutter fixed plate, more than two roll shaft cutters which are installed on a cutter mounting rack and the cutter mounting rack which is installed on the cutter roll shaft. Four gears of the cutting device are easy to replace, so that the purpose that the transmission ratio can be controlled is achieved, plates of different lengths can be cut according to user needs, the plates are cut up and down by the blades of the fixed cutter and the roll shaft cutters, and the cutting quality is increased.

The invention discloses a human body and toilet bowl isolating device and relates to a sanitary isolating device. The human body and toilet bowl isolating device comprises a paper storage roll (1), an isolating paper belt (2), a paper press roll (3), a paper drawing roll (4), a paper drawing roll connecting rod (5), a supporting roll (6), a steering roll (7), a paper press plate (8), a thrust bar (9), a grooved wheel (10), a pull roll (11), a rocking lever (12), a check lever (13), a spring (14), an electromagnet (15), a right limit bar (16), a left limit bar (17), a stop block (18) and an adjusting nut (19). The electromagnet is connected with the rocking lever to drive the pull roll to pull the isolating paper belt. The isolating paper belt is arranged between the skin of the human body and a toilet seat; the electromagnet drives the pull roll so that a pull wheel drives the isolating paper belt to move by a set length (which is equal to the length of the ring of the toilet seat); and different people use different sections of the paper belt. Therefore, the sanitary isolation is achieved and the cross infection caused by pathogenic bacteria due to use of public toilet bowls is further avoided.

The invention relates to a tension control device. The tension control device is characterized in that a creel with one end capable of containing a spooling is included, and the other end of the creel is provided with a tension adjusting device; yarns penetrate a yarn guide hook arranged on the creel through the tension adjusting device and are wound around the spooling; the tension adjusting device comprises a circular disc rotationally arranged on the creel, and a rotating shaft used for making contact with the yarns is connected to the circular disc in the axial direction; and the height of the tension adjusting device on the creel is adjustable, and the distance between the tension adjusting device and the yarn guide hook is adjustable. According to the tension control device, through the tension control device which is adjustable in height and capable of moving horizontally, friction between the yarns and the yarn guide hook is controlled, and thus the tension generated in the yarn spooling process is controlled. The tension control device is simple in structure and easy to operate; the tension adjusting device does not need to be replaced frequently when different yarns are wound, time and labor are saved, and the production cost is saved.

The invention provides a driving device and a mobile robot and belongs to the field of an all-directional wheel type mobile robot. The driving device comprises an air bag, an air conveying device and a plurality of driving mechanisms; each driving mechanism comprises a power mechanism and an air cylinder; each power mechanism is mounted at the output end of the corresponding air cylinder; the input ends of a plurality of air cylinders are respectively connected with the air bag; the air conveying device communicates with the air bag and is used for controlling the amount of air inside the air bag; the mobile robot comprises a robot main body and the driving device; the driving device is mounted at the bottom of the robot main body. According to the driving device in the mobile robot, a plurality of driving mechanisms are simultaneously connected with one air bag; the air bag communicates with the air cylinders; when the power mechanisms are in contact with the ground, the contact pressure between each power mechanism and the ground is the same under the effects of the air bag and the air cylinders, so convenience can be provided for improving the synchronous driving effect of each power mechanism.

The invention discloses a rice processing polishing and screening device with a bran powder removing mechanism, and relates to the technical field of rice processing. The rice processing polishing andscreening device with the bran powder removing mechanism aims to adjust polishing strength according to requirements. The rice processing polishing and screening device specifically comprises a mainbody. A polishing mechanism and a shelling mechanism are arranged in the main body. The polishing mechanism is located below the shelling mechanism. The polishing mechanism comprises a polishing motor, two polishing shafts and two polishing outer cylinders. The polishing motor is fixed to the outer wall of one side of the main body through screws. An output end of the polishing motor is rotationally connected to one end of a polishing shaft through a coupler. According to the rice processing polishing and screening device with the bran powder removing mechanism, by arranging an air bag with avalve core, the inflation state of the air bag can be controlled to control the friction force between the polishing outer cylinders and rice, so that the polishing strength is changed, and the practicability and the use flexibility are improved. By arranging elastic pieces, the firmness of connection between the polishing outer cylinders and the polishing shaft can be improved, the limiting effect on the polishing outer cylinders is achieved, and the phenomenon that the polishing outer cylinders slip is avoided to a large extent.

The invention relates to the technical field of parameter testers, and discloses a rocket engine inner trajectory parameter tester which comprises a tester body and a U-shaped frame. Sleeves are symmetrically and fixedly embedded in the bottom end of the U-shaped frame, the sleeve opening end of each sleeve is rotationally connected with the side wall of the tester body through a first bearing, and the outer sleeve wall of each sleeve is slidably in cup joint with a matched positioning ring, a pressure regulation and control mechanism is mounted between each positioning ring and the corresponding sleeve and comprises a moving block slidably connected in the corresponding sleeve, L-shaped rods are fixedly connected to the top end and the bottom end of each moving block, through grooves matched with the L-shaped rods are formed in the side walls of the top ends and the bottom ends of the sleeves, the ends, away from the moving blocks, of the L-shaped rods are fixedly connected with the positioning rings, and the L-shaped rods are slidably connected with the through grooves. The parameter tester is convenient to carry, and the inclination angle and height of the parameter tester can be partially adjusted and controlled according to needs so that the parameter tester can conveniently adapt to different testing environments.