34results about How to "Avoid broken teeth" patented technology

The invention relates to a spiral bevel gear tooth surface loading performance multi-objective optimization method. The method is characterized by comprising the following steps that firstly, a mathematical model of a spiral bevel gear tooth surface loading performance multi-objective optimization problem is established, and test design sample points are obtained; secondly, a tooth surface loadingcontact analysis method considering tooth root bending stress is established, tooth surface loading contact analysis is conducted on the test design sample points, target functions corresponding to the test design sample points and response values of the target functions are obtained, and then an initial sample point set including the test design sample points and the corresponding response values is obtained; thirdly, a Kriging proxy model is fitted on the basis of the initial sample point set, the mathematical model of the spiral bevel gear tooth surface loading performance multi-objectiveoptimization problem is solved, and the optimal solution set of the spiral bevel gear tooth surface loading performance multi-objective optimization problem is obtained. The method is high in calculation efficiency, high in calculation accuracy and capable of being widely applied to spiral bevel gear tooth surface loading performance multi-objective optimization.

The invention discloses an asymmetric involute worm and bevel gear pair. The asymmetric involute worm and bevel gear pair comprises a worm and a bevel gear, the two sides of gear teeth of the worm are provided with a worm mesh side tooth profile and a worm non-mesh side tooth profile respectively, and the two sides of gear teeth of the bevel gear are provided with a bevel gear mesh side tooth profile and a bevel gear non-mesh side tooth profile respectively, wherein the axial modulus of the worm is m1, the end face modulus of the bevel gear is m2, the pressure angle of the worm mesh side tooth profile is alpha1, the pressure angle of the worm non-mesh side tooth profile is alpha2, the pressure angle of the bevel gear mesh side tooth profile is alpha3, the pressure angle of the bevel gear non-mesh side tooth profile is alpha4, and the following conditions are met: a, alpha1>alpha2, and alpha3>alpha4; b, when m1=m2, alpha1=alpha3, and alpha2=alpha4; when m1 is not equal to m2, m1cosalpha1=m2cosalpha3, and m1cosaplha2= m2cosalpha4. According to the asymmetric involute worm and bevel gear pair, tooth root fracture of the bevel gear can be effectively avoided, and the shock resistance and the bearing capacity of the asymmetric involute worm and bevel gear pair in transmission are improved.

The invention discloses a treatment device for manufacturing municipal garbage regenerated insulation bricks. The treatment device comprises a box body, wherein a feed inlet is formed in the outer wall of the top of the box body, a feeding hopper is arranged on the inner wall of the feed inlet, two crushing rollers are arranged on the inner wall of the box body, the two crushing rollers are engaged to each other, fixed blocks are arranged on the inner walls of two sides of the box body, a base is arranged on the inner wall of the bottom of the box body, a first protecting shell is arranged onthe outer wall of the top of the base, and a first motor is arranged on the inner wall of the bottom of the first protecting shell. As the cross sections of first crushing teeth are trapezoidal and the cross sections of second crushing teeth are triangular, and the first crushing teeth are located right above the second crushing teeth, a condition of broken teeth as the second crushing teeth are directly used for crushing can be avoided effectively, and meanwhile, cone-shaped blocks are arranged on the outer circumferential wall of the second crushing teeth, so that the crushing effect of thedevice to municipal garbage can be improved.

The invention discloses a grinding table of a disc grinder for preparing synthetic fiber pulp, which comprises a grinding plate, wherein the working surface of the grinding plate is provided with a plurality of grooves; the grooves are distributed in a multiple-layer concentric circle mode around the grinding plate; the grooves are evenly distributed on each layer of the concentric circle; grinding teeth are formed on the grinding plate between every two adjacent grooves on the same circle; and a pulp baffle plate is formed at the gap between any two adjacent layers. The invention can prolongthe the residence time of materials in the disc grinder, weaken the cut-off function of the grinding table, enhance the effects of crushing, kneading and fibrillation on the fibers, and greatly improve the microfibrillation degree of the pulp fibers.

The invention provides a pump body and a compressor comprising the same. The pump body comprises a crankshaft, an eccentric sleeve, a limiting part, a kinetic scroll plate and a static scroll plate, wherein the crankshaft comprises a drive shaft and an eccentric shaft eccentrically arranged on the drive shaft; an eccentric hole is formed in the eccentric sleeve, the eccentric hole is eccentricallyarranged relative to the external circumference of the eccentric sleeve, the eccentric sleeve can be arranged on the eccentric shaft asway in a sleeving manner through the eccentric hole, and a limiting groove is formed in the eccentric sleeve; the limiting part is connected with the crankshaft, is matched with the limiting groove, and is capable of limiting a radial movement range of the eccentric sleeve relative to the drive shaft; the kinetic scroll plate is connected with the eccentric sleeve; and the static scroll plate is matched with the kinetic scroll plate. According to the technicalsolution provided by the invention, the problems that the kinetic scroll plate and the static scroll plate of the compressor are abraded seriously due to contact under a severe working condition, andtooth breaking can be easily caused by liquid slugging in the prior art can be solved, so that reliability of the compressor is increased.

The invention discloses a non-symmetric involute worm and gear pair which comprises a worm rod and a worm wheel, wherein a worm rod engagement side tooth profile and a worm rod non-engagement side tooth profile are arranged on the two sides of a wheel tooth of the worm rod respectively; a worm wheel engagement side tooth profile and a worm wheel non-engagement side tooth profile are arranged on the two sides of a wheel tooth of the worm wheel respectively; the axial modulus of the worm rod is m1; the transverse modulus of the worm wheel is m2; the pressure angle of the worm rod engagement side tooth profile is alpha 1; the pressure angle of the worm rod non-engagement side tooth profile is alpha 2; the pressure angle of the worm wheel engagement side tooth profile is alpha 3; the pressure angle of the worm wheel non-engagement side tooth profile is alpha 4; to guarantee the worm rod and the worm wheel to be correctly engaged under the circumstance that the included angle sigma between the shafts of the worm rod and the worm wheel is 90 degrees, the addendum coefficients and the tip clearance coefficients of the worm rod engagement side tooth profile and the worm rod non-engagement side tooth profile meet the following conditions: a, alpha 1 is more than alpha 2 and alpha 3 is more than alpha 4; and b, when m1 is equal to m2, alpha 1 is equal to alpha 3 and alpha 2 is equal to alpha 4; and when m1 is not equal to m2, m1*cos alpha 1 is equal to m2*cos alpha 3 and m1*cos alpha 2 is equal to m2*cos alpha 4.

The invention discloses a serrated knife for a high-speed carpet textile machine. The serrated knife comprises a knife rest and a blade component, wherein the blade component comprises a plurality ofblade bodies; a plurality of sawteeth are arranged on one side of each blade body; the plurality of sawteeth are arranged at equal intervals; a plurality of mounting holes are formed in one side, farfrom the sawteeth, of each blade body; the plurality of blade bodies are detachably connected with the knife rest through the plurality of mounting holes; the end parts of the plurality of blade bodies are correspondingly spliced with one another; splicing lines are formed in spliced positions; the splicing lines are positioned at the roots of the sawteeth, so that the phenomena that the splicinglines have cracks at cutting edges of the splicing lines and the shearing quality of carpet fabric is reduced are avoided; meanwhile, the invention further discloses a machining method of the serratedknife. The serrated knife machined through the method is high in quality, sharp in cutting edges and long in service life, and improves the shearing efficiency of the carpet fabric.

The invention relates to a main drive device on a scraper conveyor for mines, in particular to a speed reducer for a conveyor, and aims to provide the speed reducer for the conveyor with the advantages of novel structure, small volume, large bearing capacity, and excellent performance. The speed reducer for the conveyor comprises a body, a drive mechanism, a cooling system and a sealing element. The drive mechanism comprises an input bevel gear shaft, an intermediate gear shaft, an output inner gear shaft, and a planetary gear train. The input bevel gear shaft is provided with a bevel gear end; the intermediate gear shaft is provided with a bevel gear and a cylindrical gear which are meshed with the bevel gear end; the output inner gear shaft is provided with a cylindrical wheel meshed with the cylindrical gear; the planetary gear train comprises a sun gear, a planet carrier, a planet gear and an annular gear which is fixed on the body; the output inner gear shaft is connected with the periphery of the sun gear in a positioning mode through crowned teeth; the sun gear and the annular gear are arranged coaxially; the planet gear is positioned between the sun gear and the annular gear and meshed with the sun gear and the annular gear respectively; and the planet carrier and the output inner gear are arranged coaxially.

The invention discloses an ultrahigh working layer involute water gap diamond-impregnated drill bit and a preparation method thereof. A plurality of first mud blocking structures and a plurality of second mud blocking structures are vertically and alternately distributed in a water gap of a drill bit working part; a through U-shaped groove and a rectangular hole are formed in the positions, located on the inner diameter side of the drill bit and the outer diameter side of the drill bit, of the first mud blocking structure and the second mud blocking structure correspondingly, and a water blocking piece is arranged in the U-shaped groove; an outer water channel and an inner water channel of the working part of the drill bit are communicated with middle flow channel, a drilling fluid can smoothly pass through no matter whether positive circulation or reverse circulation is conducted, and when a first reinforcing layer between inner teeth or a second reinforcing layer between the inner teeth is just completely abraded, only connecting points at the U-shaped opening of the through U-shaped groove in the second mud blocking structure or the first mud blocking structure are worn away, the water blocking piece automatically falls off and is pushed outwards in the radial direction of the drill bit under pump pressure, and a fresh water opening is formed.

The invention discloses a speed reduction drive device with damping, lubricating, cooling and air pressure balancing functions. The speed reduction drive device comprises a speed reducer shell, a cylindrical gear drive mechanism, an oil gathering device, a lubricating oil circulating cooling device and an automatic exhaust valve. A gear of the cylindrical gear drive mechanism comprises an inner ring body, an outer ring body and a damping block. The oil gathering device comprises an annular pipe body and a partition plate. The lubricating oil circulating cooling device comprises an oil pump and a radiator. The damping block elastically deforms to achieve gear damping, noise generated in the gear engaging process can be lowered, and the gear breakage problem can be solved. Lubricating oil is brought to a gear engaging region to lubricate the gear through the oil gathering device, and the lubricating and cooling effect of the gear can be improved. The lubricating oil is pumped out to be cooled through the lubricating oil circulating cooling device, so that the problem that the temperature of the lubricating oil rises can be solved. The inner air pressure and the outer air pressure of the speed reducer shell are balanced through the automatic exhaust valve, and the problem of lubricating oil leakage caused by increase of the inner air pressure of the speed reducer shell can be solved.

The invention discloses a gear vane strength testing device and a testing method thereof. The gear vane strength testing device comprises a base, a location part, a rack and a tension meter assembly,wherein the location part is used for limiting a freedom degree for a gear to be tested to rotate in the circumferential direction; the rack is used for the gear to be tested to be meshed; in detection, the tension meter assembly can move in the tangent direction of the gear meshed position to detect strength of the gear vanes of the gear to be tested until gear vanes of the gear to be tested aredamaged. The gear vane strength testing device disclosed by the invention has the advantage of ingenious structural arrangement; the strength of the gear vanes of the gear to be tested can be measuredout by using smaller cost and simple operation; the gear vane strength testing device is favorable for a user to choose appropriate gears reasonably according to strength values of the gear vanes; furthermore, follow-up production and assembling and use safety and effectiveness of the gear in use are improved.

The invention discloses a pressing mold and a die-cast formation method. The mold comprises a lower mold body and an upper mold body matched with the lower mold body to form a cavity. The lower mold body is provided with at least one protruding fixing pin (1), through holes are formed in the portions, corresponding to the fixing pins (1), of the upper mold body, the inner diameter of the through holes is larger than the outer diameter of the fixing pins (1), and the depth of the through holes is smaller than the height of the fixing pins (1). According to the pressing mold and the die-cast formation method, the protruding fixing pins are arranged on the lower mold body, the through holes with the inner diameter larger than the outer diameter of the fixing pins are formed in the portions, corresponding to the fixing pins, of the upper mold body, then other portions in the cavity formed between the upper mold body and the lower mold body are filled with filling materials, a prefabricated piece is wrapped by the filling materials accordingly, a manufactured product can be taken out after being cooled, and pitch break and other situations in forming screws and other shapes can be greatly avoided without influencing preparation of other parts made of materials such as aluminum alloy.

The invention discloses a reduction transmission device with damping gears, and functions of oil gathering and lubrication, and air-pressure balance. The reduction transmission device comprises a reducer housing, a cylindrical gear transmission mechanism and an oil gathering device, wherein each gear of the cylindrical gear transmission mechanism comprises an inner ring body, an outer ring body and damping blocks; the oil gathering device comprises an annular tube body, partition plates, an oil inlet hole and an oil outlet hole; and an automatic exhaust valve is arranged on the top of the reducer housing. According to the reduction transmission device disclosed by the invention, the gears are stressed by an impact load respectively while being engaged, the damping blocks generate elastic deformations and realize gear damping, noise during the gear engagement can be reduced, and the problem of tooth breakage is avoided; moreover, during working of the reduction transmission device, lubricating oil in an oil storage cavity of the oil gathering device rotates with the gears, so that a part of the lubricating oil can be brought to gear engagement areas to lubricate the gears, and the lubricating and cooling effects of the gears can be improved; and furthermore, when an air pressure in the reducer housing is greater than a sealing air pressure of the automatic exhaust valve, the automatic exhaust valve is opened, and the technical problem of leakage of the lubricating oil due to the rising of the air pressure can be avoided.

The invention relates to a gear with an overload protection function and belongs to the mechanical field. The gear is composed of a snap ring, a deep groove ball bearing, a ball, an inner ring, an outer ring, a spring, an end cover and a gear. The inner ring is provided with a flat keyway as a power input, the outer ring is arranged below the inner ring and is connected with the end cover through a spring, and the end cover and the inner ring are in threaded connection. The ball is placed in a hole in the edge of the inner ring, a semispherical hole is formed in the gear corresponding to the hole thereof, and the inner ring and the gear are connected via the deep groove ball bearing and are fixed by the snap ring. The gear has the beneficial effects that an effect of cutting of a torque is achieved when the torque of the gear exceeds an extreme torque, the gear can restore automatically to achieve the overload transmission protection function of the gear, such that mechanical accidents such as broken gear, rupture or damage of a transmission part and burn of a motor when the transfer working torque exceeds the allowed extreme torque are avoided. In the drawings, 1, snap ring; 2, gear; 3, deep groove ball bearing; 4, ball; 5, outer ring; 6, inner ring; 7, spring; 8, end cover.

The invention discloses a speed reducer having an air cooling and vibration reducing gear and a gap eliminating structure. The speed reducer comprises a speed reducer shell, a gear transmission mechanism and an air cooling device, wherein the air cooling device comprises a fan, an air filter and an oil-air separator. The speed reducer further comprises a first butterfly spring for applying axial thrust to a first bevel gear, and a second butterfly spring for applying axial thrust to a fourth bevel gear; and the second bevel gear and the fourth bevel gear of the speed reducer both comprise inner ring bodies, outer ring bodies and vibration reducing blocks. The speed reducer cools a gear and lubricating oil through the air cooling device, and can prevent the problems of temperature rise and performance reduction of the lubricating oil caused by long-time work of the speed reducer; when the gear is worn, the butterfly springs can automatically push the first bevel gear and the fourth bevel gear to axially move so as to eliminate the gear fit gap caused by friction and wear; and as the vibration reducing blocks are arranged between the inner ring bodies and the outer ring bodies, the gear vibration reduction is realized, the noise can be lowered, and the harm of impact to wheel teeth is prevented.

The invention discloses a manufacturing method of a low-temperature, heavy-load and high-performance climbing gear shaft. The manufacturing method comprises the following steps: (A) an alloy steel blank is cut; and the cut alloy steel blank is forged; (B) the contour machining is performed on the alloy steel blank which is cooled to the room temperature, that is, rough turning and tooth rough milling contour machining are performed on the alloy steel blank to obtain a semi-finished product of a climbing gear shaft; (C) the semi-finished product is heated; and (D) semi-finish machining and finish machining are performed on the semi-finished product after heat treatment to obtain the low-temperature, heavy-load and high-performance climbing gear shaft. The cut alloy steel blank is forged; the alloy steel blank obtained through the forging mode is high in compactness and excellent in toughness; steel fibers form a certain uniform flowing mode; and after the semi-finished product is obtained through the contour machining, the heat treatment is performed, so that the mechanical performance of the semi-finished product is excellent, and such advantages as high strength, high ductility and high impact toughness under low-temperature environment (-40 DEG C) are still maintained.

The invention relates to an electromobile motor rotary shaft. The outer circle surface of an output end of the motor rotary shaft is provided with an involute spline; spline teeth of the involute spline are of a herringbone angle shape; and the motor rotary shaft is prepared from 20CrMnTi super-quality alloy steel through heat treatment carburizing and quenching. The electromobile motor rotary shaft is high in bearing capability, has good drive stability, is low in noise and high in product assembling efficiency, prevents drive axial force from influencing the rotary shaft, is suitable for being used in high-speed and heavy loading conditions, and is beneficial to improving the practicability of the electromobile.

The invention relates to a spiral bevel gear tooth surface loading performance multi-objective optimization method. The method is characterized by comprising the following steps that firstly, a mathematical model of a spiral bevel gear tooth surface loading performance multi-objective optimization problem is established, and test design sample points are obtained; secondly, a tooth surface loadingcontact analysis method considering tooth root bending stress is established, tooth surface loading contact analysis is conducted on the test design sample points, target functions corresponding to the test design sample points and response values of the target functions are obtained, and then an initial sample point set including the test design sample points and the corresponding response values is obtained; thirdly, a Kriging proxy model is fitted on the basis of the initial sample point set, the mathematical model of the spiral bevel gear tooth surface loading performance multi-objectiveoptimization problem is solved, and the optimal solution set of the spiral bevel gear tooth surface loading performance multi-objective optimization problem is obtained. The method is high in calculation efficiency, high in calculation accuracy and capable of being widely applied to spiral bevel gear tooth surface loading performance multi-objective optimization.

The invention discloses an automobile seat height adjusting structure with an anti-sinking function in collision. By arranging the anti-sinking device, when the height of an automobile seat is adjusted, due to the fact that all the check blocks are in a retracting state, each check block cannot hinder movement of a limiting shaft in a limiting groove according to the check track, and it is guaranteed that the height of the automobile seat can be normally adjusted; and after the height adjustment of the automobile seat is completed, if rear-end collision of automobile occurs, under the action of a downward impact force of a passenger on the automobile seat, the limiting shaft starts to sink along with the cushion. The check blocks which do not interfere with the limiting shaft in position are all in an extending state, the limiting shaft which begins to sink is blocked by the check blocks located below the limiting shaft, the check blocks below the limiting shaft are plastically deformed in sequence until the check blocks are broken, so that the sinking movement of the limiting shaft is buffered, the cushion is prevented from suddenly and rapidly sinking in the collision process, and injuries to passengers in the collision process are reduced.

The invention discloses a cylinder stepping type thin seam coal mining machine. The thin seam coal mining machine is applied to an extremely thin seam of which the thickness is less than 0.8m, and the inclination angle is 0 to 35 degrees. The thin seam coal mining machine mainly comprises a left roller, a left rocker, a pumping station, a gap bridge, a middle box, a right rocker, a running mechanism and a right roller, wherein the hydraulic pumping station comprises an anti-explosive motor, a speed increaser, a gear pump, a constant power variable pump, a cooler, a coarse filter, a fine filter and explosion-suppression electromagnetic directional valves; the running mechanism comprises thrust cylinders, a pin shaft, a check ring, a guide sliding shoe, a wedge-shaped block I, a wedge-shaped block II, locking cylinders, angle steel and a spring; the anti-explosive motor drives a dosing pump and a variable pump; and the hydraulic pump drives the running mechanism through the explosion-suppression electromagnetic directional valves to make the coal mining machine run. The thin seam coal mining machine is braked by inserting the three locking cylinders into a pin rail simultaneously, so that the thin seam coal mining machine has the advantages that the braking effect is relatively direct and effective compared with the conventional coal mining machine which is braked by a hydraulic brake on a two-section shaft; the height of a machine body can be effectively reduced, the thin seam coal mining machine stably runs and well accords with thin seam coal mining conditions; and the thin seam coal mining machine is simple in structure and easy to maintain, and the interchangeability is high.

The invention discloses a pressing mold and a die-cast formation method. The mold comprises a lower mold body and an upper mold body matched with the lower mold body to form a cavity. The lower mold body is provided with at least one protruding fixing pin (1), through holes are formed in the portions, corresponding to the fixing pins (1), of the upper mold body, the inner diameter of the through holes is larger than the outer diameter of the fixing pins (1), and the depth of the through holes is smaller than the height of the fixing pins (1). According to the pressing mold and the die-cast formation method, the protruding fixing pins are arranged on the lower mold body, the through holes with the inner diameter larger than the outer diameter of the fixing pins are formed in the portions, corresponding to the fixing pins, of the upper mold body, then other portions in the cavity formed between the upper mold body and the lower mold body are filled with filling materials, a prefabricated piece is wrapped by the filling materials accordingly, a manufactured product can be taken out after being cooled, and pitch break and other situations in forming screws and other shapes can be greatly avoided without influencing preparation of other parts made of materials such as aluminum alloy.

The invention provides an engaging-disengaging structure and a fingerprint lock, wherein the engaging-disengaging structure includes a protrusion and a cavity which may cooperate with each other to limit the relative rotation of an output shaft and an auxiliary gear; the protrusion is made of an elastic material. When torsion having magnitude of K is applied to the protrusion, the protrusion elastically deforms and slides out of the cavity; K is greater than the magnitude of driving force of the output shaft driving the auxiliary gear to rotate, wherein the protrusion is arranged on the sidewall of the output shaft; the cavity is arranged in the auxiliary gear and is used for being fitted the wall of a shaft hole of the output shaft, and alternatively, the protrusion is arranged on the auxiliary gear and used for being fitted to the wall of the shaft hole of the output shaft; the cavity is arranged in the sidewall of the output shaft. The engaging-disengaging structure can prevent tooth breaking for a transmission gear in a transmission case.

The invention discloses a building construction safety elevator. The building construction safety elevator comprises a gear and a rack matched with the gear in a meshed mode and further comprises a driving buffer chain combination, the driving buffer chain combination comprises a parallel hinge four-rod mechanism, main chain wheels, a chain and a spring damping rod, the spring damping rod is located in the parallel hinge four-rod mechanism and is vertically distributed, and the two ends of the spring damping rod are correspondingly and rotatably connected with two opposite hinge shafts on theparallel hinge four-rod mechanism. According to the building construction safety elevator, the parallel hinge four-rod mechanism is arranged, the main chain wheels are connected to the four hinge shafts of the parallel hinge four-rod mechanism, the chain is engaged with the four main chain wheels, the lowest main chain wheel is connected with the gear, specifically, a reinforcing shaft is arrangedon one side of the main chain wheel, one end of the reinforcing shaft is fixedly connected with one side of teeth on the gear, when lifting is conducted, loads borne by the teeth on the gear are mainly borne by the main chain wheels, and therefore the phenomenon of tooth breaking can be avoided.

The invention provides a force moment sensor for an output pinion of a self-elevating platform elevating unit, which consists of a left input end cover, a transferring rod, a connector, a force moment input shaft, a sensor end cover, a sensor fixing flange, a sensor body, a strain gauge, a signal transmission line, a signal processing circuit and the output pinion. The transferring rod is connected with the connector, the connector is coaxially connected with the force moment input shaft, and the force moment input shaft is connected with the sensor body. The strain gauge is fixedly adhered on a strain beam of the sensor body, and the transferring rod is coaxial with the output pinion and penetrates through a central hole of an output pinion shaft. The force moment sensor for the output pinion of the self-elevating platform elevating unit obtains load situations of an elevating unit deceleration system in real time, immediately adjusts platform moving speed according to the load situations and performs platform overload protection. The force moment sensor avoids a pinion breaking phenomenon after overload, inputs all of force moment signals into a control system, monitors stress situations of platform pile legs in real time, is matched with control of a motor, averages the force moment of the pinion and provides guarantee for safe operation of a platform.

The invention relates to the technical field of mechanical transmission devices, and specifically relates to a worm gear-worm pair for a photovoltaic power generation tracking device. The worm gear-worm pair comprises a worm and a worm gear engaged with the worm, wherein the worm gear is mainly composed of a gear body and gear teeth uniformly distributed on the outer ring surface of the gear body; the worm gear is of a fan-shaped structure; elastic transition grooves enabling the section areas of the roots of each two adjacent gear teeth to be reduced are arranged in the roots of the gear teeth; and the thickness of the gear body is greater than those of the gear teeth. The worm gear is designed to be fan-shaped, thus the cost is saved, the overall weight is reduced and installation is facilitated while a use need is met. The section areas of the roots of the gear teeth are reduced through the arrangement of the elastic transition grooves, thus bending deformation larger than that of common gear teeth can be generated under the same load, the flexibility of the gear teeth is greatly improved, the case of tooth breakage is avoided, and then the service life of the worm gear is ensured; and the overall strength of the worm gear is ensured through setting the thickness of the gear body to be greater than those of the gear teeth, thus the photovoltaic power generation tracking device smoothly and stably runs.

The invention discloses a manufacturing method of a low-temperature, heavy-load and high-performance climbing gear shaft. The manufacturing method comprises the following steps: (A) an alloy steel blank is cut; and the cut alloy steel blank is forged; (B) the contour machining is performed on the alloy steel blank which is cooled to the room temperature, that is, rough turning and tooth rough milling contour machining are performed on the alloy steel blank to obtain a semi-finished product of a climbing gear shaft; (C) the semi-finished product is heated; and (D) semi-finish machining and finish machining are performed on the semi-finished product after heat treatment to obtain the low-temperature, heavy-load and high-performance climbing gear shaft. The cut alloy steel blank is forged; the alloy steel blank obtained through the forging mode is high in compactness and excellent in toughness; steel fibers form a certain uniform flowing mode; and after the semi-finished product is obtained through the contour machining, the heat treatment is performed, so that the mechanical performance of the semi-finished product is excellent, and such advantages as high strength, high ductility and high impact toughness under low-temperature environment (-40 DEG C) are still maintained.

Super-high working layer involute nozzle impregnated diamond drill bit and its preparation method, multiple first mud resistance structures and multiple second mud resistance structures are vertically and alternately distributed in the nozzle working part of the drill bit; the first mud resistance structures and The second mud blocking structure is located on the inner diameter side of the drill bit and the outer diameter side of the drill bit. There are through U-shaped grooves and rectangular holes respectively, and a water-blocking sheet is provided in the U-shaped grooves; the outer water channel and inner water channel of the working part of the drill bit are connected with the middle flow channel. , whether it is positive circulation or reverse circulation, the drilling fluid can pass through smoothly. The only connection point at the U-shaped mouth that runs through the U-shaped groove is worn out, and the water-blocking sheet automatically falls off, and is pushed outwards along the radial direction of the drill bit under the pump pressure to form a new nozzle.