33 results about "Involute gear" patented technology

The invention belongs to the technical field of gear machining, and discloses a gear milling blade and a disc-shaped milling cutter. The gear milling blade is installed on the end faces of the two sides of a milling cutter disc and comprises a top edge, a side edge and an auxiliary edge, and the top edge is arranged between the side edge and the auxiliary edge. The outer contour line of the top edge protrudes towards the workpiece to be machined, the outer contour line of the top edge comprises a top edge arc line and a Bezier curve, one end of the top edge arc line is connected with the outer contour line of the side edge, and the other end of the top edge arc line is an end point E; one end of the Bezier curve is connected with the end point E and is tangent to the end point E, and the other end of the Bezier curve is connected with the outer contour line of the auxiliary blade. The gear milling blade has the outline shape of a Bezier curve, and can effectively improve curvature distribution on a tooth root transition curve, increase the curvature radius of the tooth root transition curve and reduce tooth root stress when cutting a tooth groove, so that the tooth root strength of an involute gear is improved.

The invention belongs to the technical field of gear machining, and discloses a gear milling blade and a disc-shaped milling cutter. The tooth milling blade comprises a side edge, a top edge and an auxiliary edge, wherein the top edge is arranged between the side edge and the auxiliary edge; the outer contour line of the top edge protrudes towards the workpiece to be machined, the outer contour line of the top edge comprises a top edge arc line and an oval arc line, one end of the top edge arc line is connected with the outer contour line of the side edge, and the other end of the top edge arc line is an end point E; one end of the elliptic arc line is connected with the end point E and is tangent to the end point E, and the other end of the elliptic arc line is connected with the outer contour line of the auxiliary blade. The tooth milling blade is provided with an elliptical profile curve, so that the curvature distribution on a tooth root transition curve can be effectively improved, the curvature radius of the tooth root transition curve is increased and the tooth root stress is reduced when a tooth groove is cut, and thus the tooth root strength of an involute gear is improved; and meanwhile, the elliptic arc line and the top edge arc line are connected and tangent at the end point E, so that the outer contour line of the top edge is ensured to be smooth.

The invention relates to the technical field of hard tubular bus grounding tools, and particularly discloses an extra-high voltage hard tubular bus grounding device, which comprises a fixed base; the movable pressing head is hinged to the fixed base through a rotating shaft, a pressing face is formed on the inner side of the movable pressing head, an involute gear structure is formed on the outer side of the movable pressing head, and ratchets are arranged on an involute gear; the driving handle is connected to the pawl, and the pawl is meshed with the ratchets on the movable pressing head; the pressure sensing module is embedded into the pressing surface of the movable pressing head or the pressure-bearing surface of the fixed base and is used for directly detecting the clamping pressure on the cable and the tubular bus; and the feedback module is connected with the pressure sensing module and used for providing perceptible feedback of the real-time clamping pressure. Therefore, the defects of a conventional grounding wire are overcome, and the cable can be safely, conveniently and reliably mounted on the hard tubular bus, so that the blank in the prior art is filled by providing a temporary grounding point with a clear state, and a safety guarantee is provided for the maintenance work of core equipment of an extra-high voltage transformer substation.

The application belongs to the technical field of gear machining, and discloses a gear milling blade and a disc-shaped milling cutter. The gear milling blade comprises a side blade, a top blade and a sub-blade, and the top blade is arranged between the side blade and the sub-blade. The outer contour line of the top blade is convex to a workpiece to be machined, and the outer contour line of the top blade comprises a top blade arc line and an elliptical arc line. One end of the top blade arc line is connected with the outer contour line of the side blade, and the other end of the top blade arc line is an end point E. One end of the elliptical arc line is connected with the end point E and is tangent to the end point E at the end point E, and the other end of the elliptical arc line is connected with the outer contour line of the sub-blade. The gear milling blade has an elliptical profile curve, which can effectively improve the curvature distribution on the dedendum transition curve, increase the curvature radius of the dedendum transition curve and reduce the dedendum stress when cutting the gear slot, so as to improve the dedendum strength of the involute gear. Meanwhile, since the elliptical arc line is connected with the top blade arc line at the end point E and is tangent to the top blade arc line at the end point E, the outer contour line of the top blade is smooth and smooth.

The invention provides a method for measuring and calculating the abrasion loss of an involute gear based on a self-reference datum. The method does not need to depend on an external reference, measurement errors caused by reference deviation are effectively reduced, an accurate and rapid calculation method is found, accurate calculation of different involute gear abrasion losses can be achieved by changing the basic parameters of the gear, and the calculation accuracy is improved. Similarly, the abrasion loss of corresponding involute parts, such as involute splines, can be accurately calculated. And a key technical support is provided for wear loss precision control and data reliability of the gear tooth surface in gear wear and gear contact fatigue tests and process and parameter design of the gear.

The application provides a measurement and calculation method based on self-reference reference involute gear wear amount. The method does not need to rely on external reference, effectively reduces the measurement error caused by reference deviation, and finds an accurate and fast calculation method. By changing the basic parameters of the gear, the accurate calculation of different involute gear wear amounts can be realized, and the wear amounts of corresponding involute parts, such as involute splines, can also be accurately calculated. The method provides key technical support for the precision control and data reliability of the gear tooth surface wear amount in the gear wear and gear contact fatigue test, and the process and parameter design of the gear.

The present application relates to a kind of gear machining process for one-way engagement.The present application includes S1, blanking: providing blank;The blank is annealed;Carry out shot blasting treatment;Phosphorus saponification surface treatment is carried out to facilitate surface lubrication;By the plastic deformation mode of extrusion material, form two connected cylinders of different sizes;Cold extrusion after the blank of shrinkage diameter is carried out cold extrusion flat processing;Preform outer circle spline extension initial step;Carry out recrystallization annealing treatment;Carry out shot blasting treatment;Phosphorus saponification surface treatment is carried out;One-time extrusion forming inner hole ratchet tooth, outer circle involute gear and involute straight spline;The workpiece after extrusion forming is turned;The workpiece after turning is treated by heat treatment carburizing quenching;The workpiece after carburizing quenching is treated by tempering;Carry out shot blasting treatment.The present application improves the single-tooth strength of inner hole ratchet tooth and outer circle involute gear, and can greatly improve production efficiency and reduce production cost.

The invention discloses a design method of a diamond roller for finishing a worm grinding wheel, which comprises the following steps of: firstly, finishing design of an involute gear tooth profile modification curve in a quadratic curve splicing manner, and obtaining a modification involute tooth surface equation based on an involute modification principle; then a meshing coordinate system based on a hypothetical rack method is established, a hypothetical rack tooth surface equation is obtained through meshing solving of the modification involute tooth surface equation, and furthermore, a worm grinding wheel tooth surface equation is obtained through secondary meshing solving of the hypothetical rack tooth surface equation; and finally, establishing a diamond roller trimming worm grinding wheel coordinate system, and obtaining a diamond roller profile according to the worm tooth surface equation in the step B on the basis of a contact line principle. According to the method, the problems that in the process of designing the diamond roller for the multi-section complex modified gear for the new energy automobile, the profile is prone to being concave inwards, and the precision is low are solved, accurate solving of the profile of the diamond roller is achieved, and the design and machining reliability of the diamond roller is improved.

The invention relates to a damage-free collecting device for ultralow single denier diacetate fiber tow production. The damage-free collecting device comprises a tow guiding device, an involute gear double-roller traction mechanism and a hydraulic lifting collecting system. The tow guiding device pre-gathers tows through a plurality of sections of arc bending restraining pieces and a conical contraction pipe, and the stability of the moving track is improved. The traction mechanism adopts a meshing pressure surface to replace traditional friction traction, and is matched with synchronous control of a servo motor to eliminate slipping and damage; the collecting system dynamically adjusts the height of a box body through a hydraulic lifting table, and tows are evenly laid. The method has the advantages that the yarn breakage rate can be effectively reduced, the production stability of the ultra-low single-denier tows for acetate staple fibers is improved, and the method can be suitable for efficient production of 1.3-denier ultra-low single-denier tows and the like.

The invention relates to the technical field of involute gear and spline gear shaping, in particular to an auxiliary centering device and centering method for an involute gear and spline gear shaping. The core purpose of the invention is to provide a novel auxiliary tool setting tool aiming at the technical defects of low tool setting precision and poor efficiency in the traditional gear shaping machining process, so that the tool setting precision problem is solved, and the production efficiency is improved; and finally, double optimization of the machining quality and the production efficiency is achieved.

The application discloses a kind of micro gear dynamics modeling methods containing rotation pair gap, belong to gear transmission system dynamics simulation technical field.The method is established by considering the calculation model of meshing stiffness of rotation pair gap based on the meshing principle of involute gear and potential energy method, deduces the calculation formula of important parameters such as gear meshing angle, side clearance, coincidence degree, and establishes the time-varying meshing stiffness calculation model of gear containing rotation pair gap;The application comprehensively considers the change of gear pair center distance caused by the existence of rotation pair gap, influences the meshing stiffness of gear, load distribution coefficient, meshing angle and side clearance etc., the change of these parameters will cause gear to present different nonlinear dynamic behavior, provide theoretical support for noise reduction and life extension of gear transmission system.

The invention discloses a worm and gear grinding tooth surface forming method and a transmission error evaluation method considering multi-head grinding wheel base pitch errors, and the method comprises the steps: firstly obtaining parameters such as a gear, a grinding wheel, machining and multi-head grinding wheel base pitch errors, defining the base pitch errors, building a grinding wheel surface model considering the errors, and building a standard involute gear model; then the grinding wheel rotating coordinate system is sequentially converted into a gear rotating coordinate system through coordinate transformation, tooth surface generation operation is conducted, and the tooth surface morphology is obtained; and finally, carrying out fast Fourier transform analysis on the tooth surface ripples, extracting tooth surface features and evaluating the ghost frequency noise risk. According to the method, the influence of the base pitch error of the multi-head grinding wheel can be accurately considered in the tooth surface generation process, tooth surface morphology prediction and howling risk analysis are achieved, and high universality and engineering application value are achieved.

A gear having volume expansion for cavitation reduction in a gear pump mesh. The gear has a gear tooth profile; a body; a plurality of involute gear teeth extending radially outward from the body and including first and second neighboring gear teeth each having a respective tip and a root, the first and second neighboring gear teeth defining a space between them; and a root pocket formed directly into the roots of the gear teeth and in the space between the gear teeth, providing an increased gear root volume and adding trapped fluid compliance while leaving unaltered the gear tooth profile. Also disclosed is a gear pump including the gear.

The application discloses a high-power stepless speed regulation system based on differential planetary transmission and a control method, and belongs to the field of mechanical transmission. The system comprises a main shell, an inner spline groove is arranged in the middle section of the inner wall of the main shell, an input end cover is arranged on the axial right end surface of the main shell, an output end cover is arranged on the axial left end surface of the main shell, the input end cover and the output end cover are fixedly connected to the corresponding end flange mounting surfaces of the main shell through bolts, and a sun wheel shaft assembly, a planetary wheel assembly, an inner gear ring and a planetary carrier assembly are sequentially arranged in the main shell from inside to outside along the radial direction. The differential planetary transmission structure that the planetary wheel assembly is simultaneously rigid involute gear meshed with the outer teeth of the sun wheel and the inner teeth of the inner gear ring is arranged, all working torques are transmitted in a pure mechanical gear meshing mode, and therefore, the effects that the transmission efficiency is high, the bearing capacity is strong, and the power density is obviously superior to that of a hydraulic transmission and a friction transmission scheme are achieved.

The application belongs to the technical field of tunneling construction equipment, and discloses a design method of a multi-tooth rock breaking cutter of a cutter head of a honeycomb type tunnel boring machine. The design method designs involute gear cutting tooth structure at the overall circumference of a cutter ring of a rolling cutter, and simultaneously uses radial force and shearing force generated by gear cutting to break rocks, so as to replace the traditional rolling cutter which only relies on the extrusion force and impact force of the cutter head to cut and break rocks, and to realize high-speed cutting construction of the tunnel boring machine. Meanwhile, the traditional solid connecting structure cutter shaft is improved to be a honeycomb type porous structure rolling cutter shaft. The honeycomb structure is composed of a series of hexagonal or other polygonal honeycomb structures arranged in the shaft body in a regular manner, and forms a continuous, uniform and periodic topological structure. The structure design improves the durability and stability of the cutter shaft under harsh working conditions on the premise of ensuring that the cutter shaft has sufficient strength and rigidity, thereby prolonging the service life of the cutter shaft.

The application belongs to the technical field of gear machining, and discloses a gear milling blade and a disc-shaped milling cutter. The gear milling blade is installed on the end face of the milling cutter disc, and comprises a top blade, a secondary blade and a side blade. The top blade is arranged between the side blade and the secondary blade. The outer contour line of the top blade protrudes towards the workpiece to be machined. The outer contour line of the top blade comprises a top blade arc line and a transition curve. One end of the top blade arc line is connected with the outer contour line of the side blade, and the other end of the top blade arc line is an end point E. One end of the transition curve is connected with the end point E and is tangent to the end point E. The other end of the transition curve is connected with the outer contour line of the secondary blade. The gear milling blade has the contour shape of the transition curve, which can effectively improve the curvature distribution on the dedendum transition curve, increase the curvature radius of the dedendum transition curve, and reduce the dedendum stress when cutting the gear slot, thereby improving the dedendum strength of the involute gear.

The invention relates to a steering engine speed reduction transmission system and method based on a linear gear. The transmission system comprises a shell assembly, a driving motor, an output shaft and a speed reduction mechanism. The speed reducing mechanism is arranged in the shell assembly and is configured to transmit the output torque of the driving motor to the output shaft; the speed reducing mechanism comprises at least one level of linear gear pair, and the linear gear pair is formed by meshing a driving linear gear and a driven linear gear; and the driving line gear and the driven line gear are respectively generated by a preset space curve and a conjugate curve thereof, and form point contact pure rolling in the meshing transmission process. Through cooperation of all the mechanisms, the single-stage large-transmission-ratio design is achieved through the small tooth number by means of the characteristic that a linear gear is free of undercutting limitation. Compared with a steering engine adopting an involute gear, the friction loss is reduced, the vibration noise is reduced, the structure compactness is improved, and the steering engine is suitable for micro steering engines, robot joints, precise executing mechanisms and other scenes.

The invention relates to an inertia slip meshing speed reduction type one-way clutch and a control method thereof. The transmission comprises an input shaft; an inner spline matched with the involute spline is arranged in an inner hole of the spline shaft sleeve; an involute gear matched with an engine gear ring is arranged on the outer circle of the driving gear, a wedge-shaped roller path is arranged in a right inner hole of the driving gear, and a pin roller and a supporting spring are arranged in the wedge-shaped roller path; the transmission gear sleeves the periphery of the input shaft; the centrifugal mechanism generates a centrifugal effect at the moment when the transmission gear drives the spline shaft sleeve to rotate; the spacer sleeve is connected to the periphery of the second step of the input shaft in a sleeving mode, the locating cover I is connected to the periphery of the spacer sleeve in a sleeving mode, and the locating cover II is connected to the periphery of the locating cover I and the left outer circle of the driving gear in a sleeving mode; the left end of the compression spring abuts against the positioning cover I, and the right end of the compression spring abuts against the positioning cover II. The invention has the advantages of compact size, small volume and light weight, and is suitable for mass production.

The utility model relates to the technical field of petroleum machinery, in particular to a jar high-torsion-resistance transmission structure which comprises a mandrel, a transmission structure is arranged on the outer arc surface of the mandrel, the transmission structure comprises outer teeth, the outer teeth are fixedly connected to the outer arc surface of the mandrel in a circumferential array shape, a spline body is arranged on the outer arc surface of the mandrel, and the spline body is fixedly connected with the mandrel. The inner teeth are fixedly connected to the inner arc surface of the spline body in a circumferential array shape, the outer teeth are meshed with the inner teeth, and a first limiting hole is formed in the outer arc surface of the mandrel. According to the internal and external splines, involute tooth transmission is adopted, the number of teeth is increased, meanwhile, due to the particularity of the tooth shape, stress is more uniform compared with other structures, and the service life of the internal and external splines is prolonged. The defects that the structure is fast in abrasion and short in service life can be overcome, the transmission efficiency is improved, the matching precision is improved, the torsional strength of the jar is improved, impact in the torque transmission process is reduced, the assembly difficulty is reduced, the service life of a product is prolonged, and a large amount of use cost is saved.

The invention discloses a self-reference measuring and positioning method for tooth profile parameters of a standard involute gear, and belongs to the field of gear parameter measurement. The implementation method comprises the following steps of: measuring the tooth profile of the involute gear by using a three-coordinate measuring machine to obtain involute coordinate measurement sequence points; a measurement curve involute of a gear tooth profile is approximate to a sine curve in shape in a tooth profile application interval section, so that when the tooth profile is represented, an optimal demarcation point is optimized and determined in a residual effective value balancing mode; a left curve waveform and a right curve waveform are used, local sine curve approximate characterization of an involute is carried out, regression residual estimation is carried out in a local sine curve fitting mode, approximate parameterization characterization is carried out on the involute through double-sine model parameters, and starting point parameters and ending point parameters of a fitting sine curve interval section are found out; and an involute interval boundary corresponding to the tooth profile of the gear is obtained, a complete tooth profile parameter measurement and characterization result with a self-reference characteristic is obtained, and self-reference measurement positioning is realized.

The application discloses a design method of a high-bearing harmonic gear transmission circular-arc tooth profile, which comprises the following steps: firstly, calibrating the tooth profile parameters of a flexible gear and a rigid gear; then, determining the relationship and value range between other parameters of the rigid gear and the flexible gear; determining the circular-arc radius of the tooth profile of the flexible gear according to the tooth surface contact stress; and finally, calculating the circular-arc parameters of the tooth profile of the rigid gear according to the conjugate meshing condition. The circular-arc tooth profile established by the application not only has the advantages of the multi-tooth meshing of the circular-arc tooth profile, but also has the feature of separable center distance of the harmonic gear transmission, so that the correct meshing can be realized even if the flexible gear is deformed due to the taper. The circular-arc radius of the circular-arc tooth profile established by the application is larger, and the contact is incircle, so that the tooth surface contact area can be greatly increased, the tooth surface contact stress can be reduced, and the service life and the precision maintenance of the harmonic reducer can be improved.

The application discloses a dynamic determination method for injection pressure of an external gear motor for hoisting, which comprises the following steps: step one, determining fluctuating output hydraulic rotating speed and output hydraulic torque from gear pair meshing process; step two, calculating angular acceleration of the output hydraulic rotating speed from the fluctuating output hydraulic rotating speed; step three, calculating dynamic hoisting load torque from the angular acceleration of the output hydraulic rotating speed; and step four, calculating dynamic injection pressure from the hoisting load torque equal to the output hydraulic torque coupling. The application provides a simple formula for injection pressure under hoisting load, clearly shows the coupling mechanism among the working conditions of the injection pressure, the rated injection flow and the rated back pressure, the hoisting involute gear-shaft geometric parameters of the base circle radius, the pitch circle radius, the tooth width and the shaft end radius, and the hoisting load mass, and makes up for the deficiency in the calculation of the output hydraulic torque and its fluctuation coefficient of the gear motor, thereby improving the design quality of the gear motor and the evaluation quality of hoisting characteristics.

The invention belongs to the technical field of tunneling construction equipment, and discloses a design method of a honeycomb type tunneling machine cutterhead multi-tooth rock breaking tool. According to the design method, an involute gear cutting tooth structure is designed on the overall circumference of a hob ring, rock breaking is conducted through radial force and shearing force generated by gear cutting at the same time, the mode that a traditional hob cuts and breaks rock only through extrusion force and impact force of a hob head is replaced, and high-speed cutting construction of the tunnel boring machine is achieved. Meanwhile, a traditional cutter shaft of a solid connection structure is improved into a hob cutter shaft of a honeycomb-shaped porous structure, the honeycomb structure is composed of a series of hexagonal or other polygonal honeycomb structures which are regularly arranged in a shaft body, and a continuous and uniform periodic topological structure is formed. According to the structural design, on the premise that it is guaranteed that the cutter shaft has enough strength and rigidity, the durability and stability of the cutter shaft under severe working conditions are improved, and therefore the service life of the cutter shaft is prolonged.

The invention discloses an involute gear tooth surface normal positioning and normal included angle measuring device and method. The device comprises a normal positioning-measuring main body structure and a normal positioning base, the normal positioning base comprises a caliper and a clamping jaw; the normal positioning-measuring main body structure comprises a first positioner, a second positioner, a second long connecting rod, a dial component, a sliding groove connecting rod, a first long connecting rod, a sliding block, a two-connecting-rod mechanism and a pointer connecting rod. According to the invention, normal positioning of the measured point of the tooth surface can be realized, the deflection angle omega can be synchronously obtained after normal positioning of the measured point of the tooth surface is realized, and the problems of fuzzy normal positioning, large angle measurement error, low operation efficiency and the like in gear tooth surface stress detection of an existing X-ray method are solved. A reliable tool is provided for stress evaluation of the gear tooth surface, and the method has remarkable engineering popularization value.

The application discloses a method for modifying the tooth profile and tooth direction of a cylindrical involute gear, and comprises the following steps: 1) defining horizontal coordinates and vertical coordinates by using a tooth profile development diagram, establishing a mathematical model for modifying the tooth profile of the cylindrical gear, and solving a tooth profile modification equation of the cylindrical gear; 2) defining the tooth direction modification in a measuring cylindrical development plane, taking the tooth line length direction as the horizontal coordinates, establishing a mathematical model for modifying the tooth direction of the cylindrical gear, and solving a tooth direction modification equation of the cylindrical gear; 3) taking the center of the cylindrical gear as the coordinate system origin, establishing a mathematical model for the tooth profile curve of the gear end face, and solving a curve equation of the tooth profile of the cylindrical gear end face; and 4) solving a tooth surface equation and a normal vector equation of the cylindrical gear according to the curve equation of the tooth profile of the cylindrical gear end face and the tooth direction modification equation. The application utilizes the characteristics of the involute gear, and obtains the tooth surface of the involute cylindrical gear after micro modification, thereby solving the problem of the meshing noise of the cylindrical gear.

Extrusion layer with a planetary roller extruder or planetary roller extruder section or planetary roller extruder module with a central spindle (9, 28), planetary spindles (10, 27) and an internally toothed housing bushing or an internally toothed housing (5), wherein the planetary spindles (10, 27) slide with their end faces facing the melt flow on a thrust ring (8) and thereby rotate around the central spindle (9, 28) and in the surrounding housing (5), and wherein their toothing meshes simultaneously with the toothing of the central spindle (9, 28) and the internal toothing of the housing (5), wherein an involute toothing is used, characterized in that, depending on the size of the planetary roller extruder or planetary roller extruder section in mm and with reference to the pitch circle diameter of the internal toothing of the housing (5) or the housing bushing (24), the following tooth modules in mm are used. and tooth counts for the planetary spindles (10,27) are used Size in mm Module / new Planetary spindle / number of teeth new 150 5,5 6, preferably 5 170 3.5 or 5.5 7, preferably 5 180 5,5 7, preferably 5 200 3.5 or 5.5 7, preferably 5 250 5,5 5 300 8 5 400 8 5 500 8 5

The application provides a catalyst calcination device, which comprises a furnace body, a base mounted at the bottom of the furnace body, a guide sliding rail of the furnace body extending along the axial direction and penetrating to an output end, a base sliding rail arranged in parallel along the axial direction on the upper surface of the base, an axial telescopic mechanism movably connected between the guide sliding rail of the furnace body and the base sliding rail, a gear transmission assembly arranged at the input end of the furnace body, and a driving unit in transmission connection with the gear transmission assembly through a universal joint. The axial telescopic mechanism is cooperatively designed with the gear transmission system driven by the universal joint, the axis offset generated by the lifting of the furnace body is automatically compensated through the cross shaft type universal joint, the continuous meshing design of the involute gear pair is matched, the adaptive adjustment of the transmission angle is ensured, and the problem of transmission interruption caused by the movement interference of the traditional device is solved.

The invention discloses a hollow pure roller pin robot joint speed reducer, which relates to the field of robot joint machinery and comprises a first-stage speed reducing structure, a second-stage speed increasing structure and a third-stage speed reducing structure, an involute gear transmission structure is adopted in the first-stage speed reduction structure, the first-stage speed reduction structure comprises a hollow center gear shaft and an input gear shaft, and the input gear shaft is meshed with a large gear on the hollow center gear shaft to achieve first-time speed reduction; the second-stage speed increasing structure comprises N planetary gears, and speed increasing transmission is achieved through meshing of a pinion on a hollow center gear shaft and the N planetary gears, so that the power transmission efficiency is improved; and the third-stage speed reduction structure adopts a pure roller pin meshing structure. The hollow type pure roller pin robot joint speed reducer is suitable for different installation spaces and power input directions, matching and maintenance convenience of downstream users under multiple working conditions are facilitated, and the system integration and later operation and maintenance cost is reduced.

The utility model belongs to the technical field of mechanical transmission, and particularly relates to a spherical involute spiral bevel gear which comprises a conical gear shaft base body and spherical involute gear teeth located on the conical surface of the gear shaft base body. Each spherical involute gear tooth is divided into a tooth root layer, a transition layer and a tooth top layer from the tooth root to the tooth top. The tooth top layer is made of a first material, the tooth root layer is made of a second material, the transition layer between the tooth top layer and the tooth root layer is made of a transition material, the tooth top layer comprises a tooth profile meshing area used for being in contact meshing with a gear, the strength of the first material is larger than that of the transition material, and the strength of the transition material is larger than that of the second material. The spiral bevel gear is large in bearing capacity, stable in operation, free of clamping stagnation, high in transmission efficiency and low in noise.

The invention discloses a standard involute gear tooth profile parameter modeling measurement positioning method, and belongs to the field of gear parameter measurement. The implementation method comprises the steps that a gear tooth profile involute is similar to a parabola in shape in a tooth profile application interval section, so that when a tooth profile is represented, a measurement waveform is divided into a left section and a right section, and an optimal demarcation point between the two sections is optimized and determined through respective fitting residual error effective value balancing modes; respectively carrying out local parabola approximation to characterize an involute by using two sections of curve waveforms on the left side and the right side of the optimal demarcation point, carrying out regression residual estimation in a local parabola fitting mode, carrying out approximate parameterization characterization on the involute by using double-parabola model parameters, and finding out a starting point parameter and an ending point parameter of a fitting curve interval section; and representing an involute interval boundary corresponding to the tooth profile of the gear according to a modeling corresponding linear mapping relation between a fitting curve interval endpoint and an involute interval endpoint, so as to realize modeling measurement and positioning of standard involute gear tooth profile parameters.