199results about How to "Reduced chance of slipping" patented technology

The invention provides a soil sampling and detecting device. The soil sampling and detecting device comprises a box body, a soil sampling mechanism, a supporting adjusting mechanism, a movable adjusting mechanism, a crushing and detecting mechanism, an auxiliary operating mechanism and a limiting mechanism. The movable adjusting mechanism suitable for adjusting and transferring different road surfaces is connected with the bottom of the box body and comprises a hub, a supporting plate, a rectangular inner threaded pipe, a rectangular sleeve, a first bevel gear, a second bevel gear, an outer threaded rod, a T-shaped rotating rod, a circular box, a third rotating shaft and a bent plate. According to the soil sampling and detecting device provided by the invention, the form of the corresponding hub needs to be adjusted in the transferring process for pushing and transferring; the device can be suitable for rolling of different types of road surfaces; and when the road condition of the soil conveying road surface is poor, transferring can be conducted in a manual carrying mode; time and labor are saved in the operation process; the working efficiency is improved; the device is suitablefor transferring of two kinds of road surfaces; and the application range of the transferring process is widened.

The invention relates to the technical field of hybrid vehicles, and provides a hybrid vehicle control method and system for a low adhesion road surface. The hybrid vehicle control method used for theP0 and P4 power configuration comprises the following steps that whether a current road surface is the low adhesion road surface or not is identified; and when the current road surface is the low adhesion road surface, the output torque of an engine is adjusted to reduce front wheel end torque of a hybrid vehicle, torque rise slope and output torque of a rear axle motor are adjusted to reduce rear wheel end torque of the hybrid vehicle and / or a strength of brake energy recovery used for the hybrid vehicle is reduced or a braking energy recovery function of the hybrid vehicle is inhibited. According to the hybrid vehicle control method and system, the low adhesion road surface where vehicle wheel drifting is prone to occurring is identified, the engine shaft end torque and the rear axle motor are subjected to special treatment aiming at the low adhesion road surface, the slip probability of the front wheel end is reduced, the stability of a rear wheel is ensured, the energy recovery strategy is optimized, and the situation that excessive recovery energy causes vehicle instability is avoided.

The invention discloses a bile and pancreatic juice drainage tube which comprises a loop type bile external drainage tube and a pancreatic juice internal drainage tube. The loop type bile external drainage tube comprises a straight tube, an elastic loop pipe I and an elastic loop pipe II which are connected in sequence, wherein the elastic loop pipe I and the elastic loop pipe II are in the shapes of Archimedean curves one the whole. The pancreatic juice internal drainage tube comprises a drainage tube body and a tube cap located at the upper end of the drainage tube body, and a line II is arranged on the drainage tube body and penetrates through the side wall of the straight tube and extends in a tube cavity of the straight tube. The bile and pancreatic juice drainage tube reduces the probability of slipping of the loop type bile external drainage tube, does not stimulate bile duct mucosae, duodenal papilla, gastrointestinal mucosae and throat mucosae, and has an effect of preventing the pancreatic juice internal drainage tube from dislocating or escaping.

The invention discloses a metal power pipe straight seam welding device. The metal power pipe straight seam welding device comprises a mounting base, welding equipment used for welding power pipelinesis mounted on the mounting base, two sets of bracket mounting seats symmetrically distributed relative to the welding equipment are mounted on the mounting base, pipe bracket mechanisms for supporting the power pipelines is mounted on the bracket mounting seats; and the mounting base supports the two coaxial power pipelines through the two sets of pipe bracket mechanisms, and roller binding beltmechanisms used for binding the power pipelines are mounted on the pipe bracket mechanisms. According to the metal power pipe straight seam welding device, two sets of brackets are arranged to be usedfor horizontally supporting the power pipelines, anti-skid rollers are arranged on the inner sides of one set of brackets to drive electric power pipelines to rotate, and the roller binding belt mechanisms for binding the power pipelines are installed on the brackets and used for increasing the contact area and strength of the power pipelines and the anti-skid rollers, so that the probability that the power pipelines slip on the anti-skid rollers is reduced, and the power pipelines at the two ends can rotate synchronously.

The invention discloses an automobile tire cleaning and temperature lowering device, and belongs to the field of automobile equipment. The automobile tire cleaning and temperature lowering device comprises an automobile body and wheels, wherein the wheels are arranged on the automobile body; a power cavity and a cleaning groove are arranged in the automobile body, and the cleaning groove is connected with the power cavity; an end cap is arranged on the end part of the cleaning groove; a press plate and two to three connecting rods are arranged in the cleaning groove, and the connecting rods are arranged on the press plate; each connecting rod penetrates through a through hole of the end cap and is connected with a top plate; a mud scraping strip is arranged on the top plate and corresponds to each wheel; a row of water spraying heads is arranged in the automobile body and corresponds to the wheels. The automobile tire cleaning and temperature lowering device has the advantages that the structure is simple, and the convenience in use is realized; the possibility of slipping is avoided by the scraping of mud on the wheels in the driving process on muddy roads; the wheels can be performed with temperature lowering in summer, and the risk of wheel blasting caused by hot weather is further decreased.

The invention relates to an industrial plant (1), to a controller and / or regulator (5), to a machine-readable program code (7), to a storage medium (6), and to a method for controlling and / or regulating a slipping motion of a roller (3, 3-1, 3-2) relative to a strip (B), particularly a cold strip to be processed in a metal processing unit, said strip being guided through a roller interconnection (2) comprising the roller (3, 3-1, 3-2) and at least one further roller (3, 3-1, 3-2) at an adjustable strip speed. By monitoring (21) the occurrence of the slipping motion by means of detecting at least one technical operating variable of the roller (3, 3-1, 3-2), and due to the fact that with the occurrence of a slipping motion of the roller (3, 3-1, 3-2), a current circumferential speed of the roller (3, 3-1, 3-2) and / or of at least one of the at least one further roller (3, 3-1, 3-2) and / or of the strip speed is changed (24, 25, 26, 27, 34) such that the current circumferential speed of the slipping roller (3, 3-1, 3-2) and the strip speed approach each other, it becomes possible to detect a slipping of a strip relative to a roller in a system, and to reduce or remedy the same, particularly during the operation of the plant.

The invention provides an inflatable tire which comprises anti-sliding nails, a tire face portion, a tire shoulder portion and grooves formed in the tire face portion and the tire shoulder portion. The grooves extend upwards in the width direction of the inflatable tire from the center line of the tire face portion and penetrate through the tire face portion and the tire shoulder portion in the width direction of the inflatable tire. According to the inflatable tire, flake ice or snow can be timely discharged so that the dewatering performance of the tire on ice can be improved; due to the fact that the flake ice or the snow left on the inflatable tire is reduced, the probability that the inflatable tire slides on the ice is reduced, the ground gripping performance is obviously improved, and the starting performance, the braking performance and the manipulation performance of the inflatable tire on the ice are more ideal.

The invention discloses a loop-type bile and pancreatic juice drainage tube, which comprises a loop-type bile drainage tube and a pancreatic juice drainage tube, wherein the loop-type bile drainage tube comprises a straight tube and an elastic loop tube; the elastic loop tube is integrally of a cylindrical spiral line shape and is provided with an elastic loop tube head and an elastic loop tube tail; the pancreatic juice drainage tube comprises a drainage tube body and a drainage tube tail positioned on the lower end of the drainage tube body; the pancreatic juice drainage tube also comprises a second line, wherein one end of the second line is connected with the lower-end side wall of the drainage tube body, and the other end of the second line passes through the drainage tube tail to be connected with a coil or a metal ring. According to the loop-type bile and pancreatic juice drainage tube, the slippage probability of the loop-type bile drainage tube is lowered, and the loop-type bile and pancreatic juice drainage tube does not irradiate a bile duct mucous membrane, duodenal papilla, gastrointestinal mucosa and a throat mucous membrane; while the loop-type bile drainage tube is taken out, the pancreatic juice drainage tube can be simultaneously taken out so as to avoid a secondary ERCP (Endoscopic Retrograde Cholangiopancreatography) surgery and lower treatment cost and surgery risks; the loop-type bile and pancreatic juice drainage tube has a function that the pancreatic juice drainage tube can be prevented from inwards moving or separating.

The invention belongs to the technical field of positioning pieces, and particularly relates to a screw. The screw comprises a screw head and a screw section formed by extending downwards from the screw head, wherein the screw section comprises a rod body formed by extending downwards from the screw head and a plurality of teeth portions formed outside the rod body; the screw head comprises a screw head main body and a starting plane arranged at one end of the screw head main body; a screw groove is formed in the screw head; the cross section of the screw groove has a closed structure consisting of five sequentially connected n-shaped convex teeth. Compared with the prior art, the cross section of the screw groove in the screw has the closed structure consisting of the five sequentially connected n-shaped convex teeth, and a stress effect is adequately considered, so that the groove profile is higher in torque transmission characteristic and the radial force with concentrated stress cannot be caused during fastening, a real 0-degree driving angle is realized, the radial force is eliminated, the driving performance of screw twisting is improved, the service life of the tool is prolonged, and the labor processing cost is reduced.

The invention discloses an intelligent taxi on-call system and method based on the mobile internet. The method comprises the steps that firstly, a client side sends positioning data of a user to an order processing server, and the order processing server obtains, processes and adds the positioning data into a passenger database, a vehicle-mounted system sends taxi information to a vehicle information server, and the vehicle information processing server processes the taxi data by means of a taxi driver information library to obtain an empty taxi database; secondly, a dispatching server screens out the taxies and sends the processed data to the client side; thirdly, empty taxi icons are displayed in the client side; fourthly, the user selects and calls the driver; fifthly, if the user and the driver negotiate successfully, the sixth step is carried out, and if the user and the driver negotiate not successfully, the fourth step is carried out again; sixthly, the user takes the taxi and evaluates the driver. According to the intelligent taxi on-call system and method, the rush hour engaged line problem does not exist, and the communication congestion is reduced; the utilization efficiency of taxi resources is improved, the number of the taxies in one area is reduced, environmental friendliness is facilitated, and energy is saved.

The invention discloses a Y-shaped bile pancreatic juice drainage tube. The drainage tube comprises a loop type bile outer drainage tube body and a pancreatic juice inner drainage tube body. The loop type bile outer drainage tube body comprises a straight tube, an elastic loop tube I and an elastic loop tube II which are connected successively. The whole of the elastic loop tube I and the elastic loop tube II are in an Archimedes shape. The pancreatic juice inner drainage tube body comprises a drainage tube body and a tube cap arranged at the upper end of the drainage tube body. The side wall of the drainage tube body is connected with the side wall of the straight tube through a connection portion. By means of the drainage tube, the probability of slip of the loop type bile outer drainage tube body is reduced, bile duct mucosae, duodenal papilla, and gastrointestinal tract mucosae and pars laryngea pharyngis mucosae are all simulation-free. By means of the drainage tube, the pancreatic juice inner drainage tube body can be taken out while the loop type bile outer drainage tube body is taken out, the secondary ERCP operation is prevented, and the treatment cost and the operation risk are reduced.

The invention discloses a clothes-airing device which comprises a device body, a support system, a control system and an optical detection system, wherein the device body is connected with the support system; the control system is connected with the support system; the optical detection system is connected with the device body; the device body comprises a rotating module, a driving module and a hanger fixing device; the rotating module comprises a motor, a driving wheel and a driven wheel; the motor is connected with the driving wheel; the driven wheel is meshed with the driving wheel. The clothes-airing device can rotate the clothes on a clothes hanger following a conveyor belt; the sunny side and the dark side of the airing clothes can be freely switched and can be alternately irradiated by the sunlight; the problem that tiny bacteria is easily propagated because a rear row of a double-row clothes hanger cannot be irradiated by sunlight can be solved.

The invention relates to a portable aluminum material cutting machine with a cutting angle adjusting function. The portable aluminum material cutting machine comprises a blade and a base and further comprises a steering mechanism and two replacing mechanisms. The steering mechanism comprises a supporting ring, a rotating ring, a second ring-shaped groove, a driving assembly, two supporting pillarsand two lifting devices. Each replacing mechanism comprises a rotating shaft, a driving ring, a limiting assembly, a moving casing pipe, a first ring-shaped groove, a clamping plate, two air cylinders, at least two installation holes and at least two limiting blocks. The driving assembly comprises a second motor, a gear and a ring-shaped rack. Each limiting assembly comprises two sliding groovesand two sliding blocks. By means of the portable aluminum material cutting machine with the cutting angle adjusting function, the steering mechanism can be used for adjusting the angle of the blade sothat the blade can conduct cutting from different angles according to requirements, practicability of the cutting machine is improved, the blade demounting and mounting convenience is improved through the replacing mechanisms, and the blade replacing convenience is improved.

The invention discloses a parcel supply system, a cross belt sorting system and a parcel supply method. According to the parcel supply system, articles are automatically output one by one through a single-piece separation conveyor, so that the process of manually feeding parcels one by one can be omitted; meanwhile, the problem that the positions of bar codes on the articles conveyed by the single-piece separation conveyor are uncertain can be effectively solved through a six-face code scanning conveying line, so that manual-work-free automatic parcel supply can be achieved; furthermore, the articles are distributed to three parcel supply tables through a deflection wheel sorter, so that it is unnecessary to configure a six-face code scanning conveying line and a single-piece separation device for each parcel supply table, then the complexity of the equipment can be greatly reduced, the integration degree of the equipment is improved, and the utilization rate of the single-piece separation conveyor and the six-face code scanning conveying line can be increased; and meanwhile, compared with an arrangement mode with multiple code scanning devices and single-piece separation devices,the mode can effectively reduce the calculation amount of a control device and is beneficial to lowering the configuration requirement of the control device and improving the calculation efficiency.

The invention discloses a drop-resistant hand-held gas detector for photocatalytic production in the technical field of gas detectors. The drop-resistant hand-held gas detector comprises a gas detector main body, wherein a protective shell is arranged on an outer wall of the gas detector main body; inner walls at the left side and the right side of an inner cavity of the protective shell are laminated with the outer wall of the gas detector main body through fasteners with the same structure; the bottom of a mounting block is in threaded connection with a movable rod; an outer rod movably sleeves the outer wall of the movable rod; a turn table is arranged at the bottom of the outer rod; rotating balls are arranged at the left side and the right side of the top of the turn table; a threadedrod is welded at the center of the top of the turn table; an assembly slot is formed in the outer wall at the rear end of the protective shell; a support assembly is arranged in the assembly slot; according to the gas detector, an arc-shaped groove is formed in the outer rod; friction ridges are arranged on the arc-shaped groove; and skid-proof stripes are arranged on the outer wall of the outerrod, so that the friction force between an operator's hand and a rod body is improved; and meanwhile, an operator's arm and the rod body are fixed through an elastic belt, so that the sliding probability of the gas detector is reduced.

The invention discloses a control method of a hot rolling roughing mill. The method comprises the steps that a board blank enters a rough rolling area, load distribution of a slip pass is optimized again, and the board blank rolling reduction of the slip pass is reduced; the set value of rolling force of a roughing mill vertical roll of the board blank is adjusted, and the holding force is increased; the speed of the roughing mill vertical roll and a roller way when the board blank is gripped is adjusted, and the conveying speed is increased; and descaling water of the current pass of the board blank is eliminated, wherein the steel gripping signal of the roughing mill is judgment of rolling force at the moment of steel gripping. The technical problem that due to the slip phenomenon of a board blank in a roughing mill in the prior art, the board blank cannot be normally gripped, and accordingly normal production rhythm is affected is solved. The technical effect that rapid response isachieved when the board blank slides while being gripped in the roughing mill, the production accidents of board blank abandoning and rollback are avoided, and the production efficiency is improved are achieved.

The invention discloses a distribution cabinet, which relates to the technical field of electric power equipment. The above-mentioned distribution cabinet, including a cabinet, a Cabinet door and a partition plate, the partition plate includes a first partition plate and a second partition plate, the cabinet door is hinged on the cabinet body, the first partition plate and the second partition plate are arranged in the cabinet body and parallel to each other, characterized in that: A plurality of U-shaped grooves are arranged on opposite inner side walls of the cabinet body, The two ends of the first partition plate are respectively inserted into the U-shaped groove, and the cabinet body is also provided with a lifting device, and the output end of the lifting device is connected with thesecond partition plate. The distribution cabinet can adjust the position of the partition plate according to the size of the installed internal components so as to meet the installation requirements.

A method for controlling torque delivery in a vehicle powertrain using an enhanced limited operating strategy. The strategy is implemented when a powertrain controller fails to respond properly to a driver command for traction wheel torque whereby a modified wheel torque at vehicle traction wheels under driver control is made available.

The invention relates to the field of mechanical sampling, and particularly discloses a special sampling manipulator for an industrial robot. The special sampling manipulator comprises a manipulator part, a first joint arm, a second joint arm and a second hydraulic cylinder, wherein the left end of the first joint arm is movably connected with the manipulator part, the other end of the first jointarm is movably connected with the second joint arm, one end of the second hydraulic cylinder is movably connected with the rear end of the first joint arm, and the other end of the second hydraulic cylinder is connected with the middle of the second joint arm. The special sampling manipulator further comprises a first hydraulic cylinder and a fixing support, wherein the upper end of the fixing support is connected with the second joint arm and the first hydraulic cylinder, the other end of the first hydraulic cylinder is movably connected with the second joint arm, and a rotating gear is arranged at the lower end of the fixing support. The special sampling manipulator for the industrial robot is provided with the two joint arms and the manipulator part, the operation sampling form can beflexibly adjusted to adapt to different working scenes, and the sampling efficiency is improved.

The invention discloses a double-circuit line double-triangle arrangement insulation pole erecting tool. The tool comprises a wire supporting rod, an insulation cross arm and an electric pole insulation sleeve, the tool is used for electrified pole erecting operation, the wire supporting rod is composed of three insulation rods, first wire buckles are arranged on the insulation rods, and each first wire buckle comprises a clamping head and a clamping base. The clamping bases are arranged on the insulation rods in a sleeving manner, the insulation rods are used for movably connecting the firstwire buckles with the insulation rods, the clamping bases are provided with connecting parts, the insulation cross arm comprises a first cross arm and a second cross arm, the insulation cross arm is provided with a second wire buckle movably connected with the insulation cross arm, and the electric pole insulation sleeve is arranged on the surface of an electric pole. The tool has the advantages that the possibility of mistaken touch of interphase wires in the operation process can be reduced, and the working efficiency of workers is improved.

The invention discloses a balance training table for martial art teaching. The table comprises a square body, a first groove is formed in the top of the square body, a second groove is formed in the square body, a sliding groove is formed in the inner wall of the first groove, the sliding groove is communicated with the first groove, a sliding plate is connected into the sliding groove in a sliding mode, and a supporting plate is connected into the first groove in a sliding mode. According to the invention, the sliding groove is formed in the first groove; a sliding plate and a sliding grooveare added; the stability of the supporting plate is improved; through adding of support rods, the movement track of the support sleeve is limited; by additionally arranging a first spring, the supporting sleeve can return to the original position, by additionally arranging a sliding block and a strip-shaped groove, a first movable rod can swing, by additionally arranging a second fixing plate, a first sliding sleeve can swing, by additionally arranging a clamping rod, a second sliding rod can drive the clamping plate to move, by additionally arranging the first fixing plate, the stability of the first movable rod is improved.

The invention relates to a tensioner of the spinning machine lower leather collar. The middle roller and the lower pin are set on the middle roller sliding seat which is set on the roller seat. The tension frame is connected with the supporting rod by the reed. A long hole is set on the reinforced rib in roller seat, which is set with the tension rod installing plate which is set on the roller seat through the bolt. The installing plate is set with the tension frame, the middle roller through the tension frame supporting rod which is connected with the lower pin through the lower leather collar. The tension frame can be adjusted in the 45: angle line to decrease the probability of the lower leather collar crushed between the lower pin and middle roller.

The invention provides an intelligent gas injection method for inter-well gas lift. The method comprises the steps that 1, the annulus liquid level of an oil-gas well is obtained; 2, the wellbore liquid accumulation amount of the oil-gas well is calculated according to the annulus liquid level and the casing pressure and oil pressure of the oil-gas well; and 3, the wellbore liquid accumulation amount is compared with a preset liquid accumulation amount threshold interval, and inter-well gas lift is started or ended according to a comparison result. According to the method, whether gas injection is needed for the oil-gas well or not and the gas lift opportunity can be automatically determined according to the wellbore liquid accumulation condition of the oil-gas well, thus, intelligence ofinter-well gas lift can be achieved, the liquid drainage effect and the liquid drainage efficiency are improved, and energy saving is facilitated.

The invention discloses a coating machine tension control and speed measurement system. Including; winding roller, first idle roller, tension roller, second idle roller, unwinding roller, substrate, speed sensor, wherein; winding roller is driven by a servo motor, and the servo motor controls the speed of winding roller; tension roller Equipped with a tension sensor, the speed measuring roller floats freely and is in contact with the upper surface of the substrate, and uses its own weight to provide tension to the substrate; the substrate passes through the unwinding roller, the second idler roller, the tension roller, and the second roller respectively from the moving direction. An idler roller and a winding roller; the first idler roller, the second idler roller, the unwinding roller, and the winding roller are all fixed on the bracket; the unwinding roller contains a clutch; the clutch and the tension sensor form a closed-loop feedback circuit, and the servo The motor and speed sensor form a closed-loop feedback circuit. The invention has a compact structure, reduces the space occupied by equipment, provides a simple and reliable feedback mechanism, applies controllable tension to the base material and improves the accuracy of speed measurement.

The invention discloses a convenient-to-clean sputum suction device for a pneumology department, and relates to the technical field of sputum suction devices for the pneumology department, and aims tofully clean sputum adhered to a sputum suction collection box. The sputum suction device specifically comprises a box body, two cover plates are connected to the outer wall of one side of the box body through hinges, the sputum aspiration collection box is arranged on the outer wall of the top of the box body, a graduated scale is arranged on the inner wall of one side of the sputum aspiration collection box, three connectors are fixed to the outer wall of one side of the sputum aspiration collection box through bolts, a liquid outlet pipe is fixed to the outer wall of one side of the sputumsuction collection box through screws, a sealing cover plate is slidably connected to the outer wall of the top of the sputum suction collection box, a water disc is welded to the outer wall of the bottom of the sealing cover plate, and two or more flushing heads are fixed to the outer wall of the bottom of the water disc through bolts. Water in the water tank can be pressurized through a pressurepump, meanwhile, an insertion hole is formed in the outer wall of the top of the sealing cover plate, and the water in the water tank can be rapidly guided into the water disc through a flushing pipe.

The present invention relates to an ecological slope protective apparatus for rock slopes and applications thereof, belonging to the technical field of protecting rock slopes. The ecological slope protective apparatus herein comprises a water induction pipe, a branch valve, a retaining ring, a plant pipe, an immediate, an end cover, a water drain pipe, a cross connection, a main valve, and a water pool. The applications herein include steps of: calculating, analyzing and polishing firmness of the rock slope; remaking single-unit plant pipes; filling organic soil to the single-unit plant pipes; conducting pipe-net-line arrangement of the plant pipes on the rock slope; installing and assembling single-unit plant pipes filled with organic soil into a plant pipeline based on the arranged pipes, nets and lines; planting plants in the plant pipes of the installed plant pipeline; arranging the water pool; maintaining and managing plants in the plant pipes; greening the rock slope through plants growth. The ecological slope protective apparatus herein and the applications thereof not only realize greening of rock slopes, but also do not influence firmness of rock slopes.

The invention discloses a solar water heater with efficient heat gathering and heat preservation functions, and belongs to the field of solar water heaters. According to the solar water heater with the efficient heat gathering and heat preservation functions, water and quick lime enter an inner cavity of a reaction tank through a water guide pipe and a quick lime guide pipe correspondingly to generate a large amount of heat, the heat is conducted to a heating pipe through a heat conduction sleeve, and water in an inner cavity of a water heater body is subjected to heat preservation and heating through the heating pipe, so that the temperature of the water in the inner cavity of the water heater body is kept at 40 DEG C or even higher at minimum, the energy loss is reduced, economic benefits are improved, the water and the quick lime can be quantitatively and automatically conveyed, workers only need to conduct filling of the water and the quick lime regularly, and operation and use by people are facilitated; and slaked lime can be generated after the water reacts with the quick lime, water flow reacts with the slaked lime through an inner cavity of a storage box in the process that water needs to be supplemented to the water heater body through a water inlet guide pipe, the water can be disinfected, and the water quality can be softened.

The invention provides a discharge mechanism of a 3D printer. The discharge mechanism comprises a box, a first rotating shaft, a second rotating shaft and a first drive motor, wherein the box at least comprises a front support plate and a rear support plate; the first rotating shaft can slide along the width direction of the box; a first material pressing wheel and a first worm wheel are synchronously connected to the first rotating shaft; a second material pressing wheel is synchronously connected to the second rotating shaft; a gap for linear printing supplies to pass through is formed between the circumferential surfaces of the second and first material pressing wheels; a body part of the first drive motor is fixed on the box; a first worm meshed with the first worm wheel is synchronously connected to a rotating shaft of the first drive motor. The discharge mechanism achieves self-balancing of wire pressing forces by adopting a worm wheel and worm mechanism, thus reducing the risk of fracture of wires of the linear printing supplies. Meanwhile, the discharge mechanism can reduce the slipping possibility of the linear printing supplies, thus improving the reliability of the 3D printer.