256 results about "Rooted tooth" patented technology

A seat adjustment mechanism includes a first component and a second component movable relative to the first component. A drive mechanism is drivingly connected to the second component for moving the second component relative to the first component. The drive mechanism includes a drive motor drivingly connected to a first gear member having conical involute teeth. A second gear member includes conical involute teeth in meshing engagement with the conical involute teeth of the first gear member. The conical involute teeth have a tapered tooth thickness, a tapered root and a tapered outside diameter.

The invention provides an assembling and meshing precision adjusting method for a harmonic reducer, and relates to the technical field of reducers, the harmonic reducer comprises a flexible gear and a rigid gear with specific tooth profiles, and the tooth profile of the flexible gear comprises a first arc tooth top and a first arc tooth root; the tooth profile of the rigid gear comprises a second planar tooth top, transition arcs located at the vertex angles of the two sides of the second planar tooth top and a second arc-shaped tooth root. The elliptical wave generator is used for driving the flexible gear; the wave height of the wave generator is defined as the difference between a long half shaft and a short half shaft; the method comprises the following steps: acquiring a tooth profile parameter set of a flexible gear and a rigid gear, wherein the tooth profile parameter set comprises a first tooth crest arc radius, a first tooth root arc radius, a second tooth crest plane width and a second tooth root arc radius; based on the tooth profile parameter set, according to a preset matching relation used for optimizing the meshing performance, cooperatively determining a target wave height matched with the tooth profile parameter; and according to the target wave height, a corresponding wave generator is selected to complete the assembly of the harmonic reducer.

The invention belongs to the field of data processing, particularly relates to a wind turbine generator gear box tooth surface strength optimization method considering multi-working-condition load distribution, and aims to solve the problem that the optimization effect is affected due to the fact that strength optimization checking is carried out only for a single working condition in the prior art. The method comprises the following steps: acquiring working condition data of the gearbox under various preset working conditions; load spectrum decoupling processing is conducted on the working condition data, a dynamic load distribution matrix synchronous with the tooth surface meshing period is determined, stress field conversion is conducted on the dynamic load distribution matrix, and a tooth root bending stress field and a tooth surface contact stress field are obtained; inputting the tooth root bending stress field and the tooth surface contact stress field into a pre-constructed double-constraint optimization model to obtain a tooth surface strengthening parameter tensor output by the model; and inputting the tooth surface strengthening parameter tensor into a preset process mapping system. Based on the method provided by the invention, the multi-working-condition operation data of the gearbox are synchronously obtained for optimization calculation, and the limitation of traditional single load analysis is broken through.

The invention relates to the field of mechanical transmission control, and discloses a self-adaptive torsion optimization method and system based on a stress model. The method mainly comprises the following steps: acquiring strain, temperature and vibration data of a transmission system in real time through a distributed sensor network; constructing a three-dimensional dynamic stress field model, and marking a high-risk area; dynamically adjusting a safety threshold based on material fatigue characteristics, and generating a torque control curve by adopting an optimization algorithm; and eliminating response delay through a pre-compensation mechanism. The system comprises an edge calculation unit, a millisecond-level actuator and a grading protection module. According to the method, the tooth root stress concentration is successfully inhibited by 35% in the wind power gear box, the impact load is reduced by 52% in the industrial robot joint, the equipment reliability is remarkably improved, and the service life is remarkably prolonged. The device is suitable for transmission systems of wind power, electric automobiles, industrial robots and the like.

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 discloses a gear pair life prediction method based on dynamic stress, belongs to the technical field of reliability design of mechanical transmission systems, and aims to solve the problem of inaccurate life prediction caused by neglecting a dynamic effect and a real surface topography in an existing gear design method. The method comprises the following steps: firstly, acquiring gear pair interface mechanical property parameters considering shafting vibration, dynamic load and surface roughness, wherein the parameters comprise transient oil film pressure, friction coefficient, oil film thickness and shear stress; solving a three-dimensional subsurface stress field by adopting an algorithm and calculating von Mises equivalent stress distribution; stress volume integration is conducted on different rough surfaces, the honed surface is used as the reference, the relative fatigue life of other surfaces is calculated based on the Zaretsky life prediction theory, and accurate prediction and process optimization of the contact fatigue life are achieved; meanwhile, the dynamic bending stress of the tooth root is calculated based on the dynamic normal load, and the bending fatigue safety coefficient is checked.

The invention discloses a detection method and device of a tooth root stress test system and a medium, the tooth root stress test system comprises a plurality of tooth root stress detection units, the tooth root stress detection units are attached to the surface of a tooth root, each tooth root stress detection unit comprises a plurality of strain gauges, and each strain gauge comprises a positive terminal and a negative terminal; in the same tooth root stress detection unit, the strain gauges are connected in series; the detection method of the tooth root stress test system comprises the following steps: acquiring a current total resistance value of the tooth root stress detection unit and a theoretical total resistance value after the strain gauges are connected in series; judging whether the difference value between the current total resistance value and the theoretical total resistance value is within a first difference value preset range or not; and if yes, determining that each strain gauge in the tooth root stress detection unit is normally insulated.

The invention discloses an involute helical gear forming grinding force prediction method, which comprises the following steps: firstly, based on a helical gear forming grinding space motion relationship, establishing a helical tooth surface model comprising an involute surface and a tooth root transition curved surface, and constructing a geometric contact model of a grinding wheel and a gear; then, tooth surface deformation data obtained after heat treatment are obtained through a three-coordinate measuring machine, coordinate mapping is carried out, and the grinding depth and contact parameters are corrected; on the basis, a grinding force integral model considering the heat treatment influence is established by combining a plane grinding mechanism, and integral calculation is carried out on tangential and normal grinding force of a tooth surface involute section, a transition arc section and a tooth bottom section; finally, actual measurement data are obtained through a grinding experiment, and model parameter calibration is completed. According to the method, dynamic and accurate prediction of tangential and normal grinding force in the bevel gear forming and grinding process can be achieved, and a reliable basis is provided for mechanical behavior analysis and process optimization in the gear machining process.

The invention provides a design method of a full-life diamond roller for a powerful inner honing wheel. The design method comprises the steps that design parameters of the diamond roller are determined according to parameters of an outer gear and the inner honing wheel; the design parameters of the diamond roller comprise a normal modulus Mn, a circle dividing normal pressure angle Afn, a helix angle Bf2, a tooth number Z2, a displacement coefficient Xn2, an addendum circle diameter Deg2, a root circle diameter Dig2 and an effective starting circle diameter dyx2; and calculating the addendum circle diameter and addendum width of the diamond roller. According to the parameters of the new inner honing wheel and the old inner honing wheel, design parameters of the two sets of diamond rollers are determined respectively, and then the design parameters of the full-life diamond roller are obtained through intersection; the tooth crest width of the diamond roller is checked, it is guaranteed that the tooth crest does not become sharp, parameters of the diamond roller are optimized, the optimality of the honing process is guaranteed, the diamond roller is designed only in 20 minutes at present, and compared with dozens of hours in the prior art, efficiency is greatly improved, and the new product development period is shortened.

The invention discloses a rotary speed reducer gear tooth root strength test device which comprises a test bed, a mounting mechanism, a rotating mechanism, a limiting mechanism, a strength test mechanism and an observation mechanism. A mounting mechanism is arranged in the center of the test bench to fix a to-be-tested gear and can adapt to replacement of gears of different specifications; the mounting mechanism is connected with a rotating mechanism under the test bench, and a rotating motor is provided with an encoder to realize accurate rotation angle switching of a gear; limiting mechanisms are arranged on the left and right sides of the mounting mechanism and can move in the radial direction to be engaged with the gears for limiting or separated for avoiding. Strength test mechanisms are arranged in front and back, can be adjusted in the radial direction, can be meshed with a single tooth to apply force, and can be fed back by a force sensor to switch postures by rotating an oil cylinder and an air cylinder; an observation mechanism on the strength test mechanism is used for detecting tooth root cracks by using an endoscope and marking the tooth root cracks through a spray head. The device does not need repeated positioning, can continuously detect each tooth root, improves the efficiency and precision, is adaptive to gears of various specifications, and meets the industrial detection requirements.

The invention provides a bionic stubble cutting knife, a bionic stubble cutting knife device and a design method, and relates to the technical field of agricultural machinery, the bionic stubble cutting knife comprises a knife disc base body and a plurality of knife teeth uniformly distributed along the circumference of the knife disc base body in the same direction, each knife tooth comprises a main cutting edge, a tooth tip, a knife back and a tooth root reinforcing rib which are connected in sequence, and the angle of the main cutting edge imitates the upper jaw of a earwig. The outer contour curve of the cutter tooth is formed by sequentially connecting a main cutting edge curve, a tooth top curve, a cutter back curve and a tooth root reinforcing rib curve in a transition mode, and the connecting points of the curves are tangent. The bionic stubble cutting knife device comprises a bionic stubble cutting knife, a connecting structure, a vibration reduction structure, a connecting spring and a driving device, and the vibration reduction structure adopts a two-stage composite vibration reduction system. Through a bionic cutting structure, a two-stage vibration reduction system and a flexible adaptive design, cooperation of efficient cutting, stable operation, cost reduction, efficiency improvement and environmental protection is achieved, a better solution is provided for agricultural stubble cutting operation, and technological upgrading of agricultural machinery equipment is promoted.

The application discloses a burr cleaning equipment for gear machining, and belongs to the technical field of gear machining, and the technical key points are as follows: the burr cleaning equipment comprises a bottom plate, a gear positioning mechanism and a gear polishing mechanism are arranged, and the gear body can be clamped and fixed in a self-adapting mode according to the inner diameter of the gear during burr cleaning, manual intervention is greatly reduced, the labor intensity of an operator is reduced, and the synchronous burr cleaning mode for the tooth surface, the tooth top and the tooth root reduces the corresponding clamping frequency and adjustment time, and the overall machining efficiency is significantly improved; the gear taking mechanism can quickly and stably complete gear grabbing, discharging and grabbing feeding operations, the movement characteristics of the multi-degree-of-freedom moving assembly can significantly shorten the single feeding and discharging time, the production efficiency is significantly improved compared with traditional equipment, and the burr cleaning equipment has the advantages of convenient gear taking and placing, high automation degree and high working efficiency.

The invention provides a fir-shaped assembly molded line suitable for a high-rotating-speed turbine moving blade and a design method. The tooth crests of all blade root teeth located on the same side are tangent to the same blade root outer tangent line, and the groove bottoms of at least two blade root grooves located on the same side are tangent to the same blade root inner tangent line; the included angle VA between the outer tangent lines of the two blade roots is 30-40 degrees; the included angle VB between the two blade root inner tangent lines is 20-30 degrees; the inclined angle VC of the blade root tooth working surface part relative to the blade root top surface part is 20-30 degrees; the included angle VD between the blade root tooth working face part and the blade root tooth non-working face part ranges from 40 degrees to 50 degrees. The working face portions of every two adjacent blade root teeth located on the same side are parallel in pairs. The molded line is obtained through optimization after the strength performance, the machining feasibility, the production cost and the period are comprehensively considered, and the molded line has the advantages of being good in strength performance and convenient to machine and manufacture and can be particularly applied to a regulating stage moving blade or a last stage long blade of a high-rotating-speed turbine.

The present application relates to gear processing forging equipment technical field, specifically a kind of temperature monitoring function's gear processing is forged device, and the forging device includes first forging machine, second forging machine, manipulator, test table, first forging machine is processed into intermediate body by hollow cylindrical raw material block, second forging machine is placed in first forging machine side, second forging machine is processed into gear-shaped forming body by intermediate body, test table is placed in second forging machine side, test table tests the tooth root toughness in the meshing process of forming body, manipulator is set between first forging machine, second forging machine, test table for transferring workpiece.Raw material block is heated to forging point using resistance heating mode, resistance heating electrode is set in first forging machine and second forging machine, first forging machine and second forging machine are with infrared probe to identify the temperature of raw material block and intermediate body in heating process.After obtaining intermediate body, the outer edge of heated intermediate body, so that the material that becomes tooth surface finally in second forging process is based on the material of original outer edge.

The large-modulus hardened gear ring structure comprises a gear ring and gear teeth arranged on the inner wall of the gear ring, one end of each gear tooth is a first tooth end, the other end of each gear tooth is a second tooth end, a first step is arranged on one side of each first tooth end, the first step is arranged on the inner wall of the gear ring, and the second step is arranged on the inner wall of the gear ring. A cutting groove is further formed between the first tooth end and the first step and connected between the first tooth end and the first step in a transition mode, the side face, close to the first tooth end, of the cutting groove and the axial end face of the first tooth end are located on the same vertical face, and the bottom end of the first step and the tooth root of the first tooth end are located on the same vertical face. A second step is arranged at the end, away from the first step, of the gear ring and arranged at the joint of the second tooth end and the gear ring, and the axial end face of the second step and the axial end face of the second tooth end are located on the same horizontal plane. According to the device, broken cutting caused by heat treatment deformation of the first tooth end and the second tooth end is reduced, so that the production efficiency of the large-modulus hardened gear ring is improved.

The removable anti-loosening false tooth comprises a false tooth main body, a tooth root connecting block is arranged at the bottom of the false tooth main body through a connecting groove with internal threads, and a tooth root sleeve for performing outer protection positioning on the tooth root connecting block is arranged at a bottom port of the connecting groove and located at the bottom of the false tooth main body; through the false tooth main body, the connecting groove, the tooth root connecting block, the tooth root main body and the threaded connecting part, the false tooth main body is fixed on the threaded connecting part on the tooth root connecting block through threads of the connecting groove for connection and fixation, so that the false tooth main body and the tooth root connecting block can be quickly fixed, and the tooth root sheath is positioned and sleeved outside the tooth root connecting block for protection; according to the structural connection mode, the false tooth main body only needs to be screwed to be separated from the tooth root connecting block in the picking and replacing process, so that the worn false tooth main body can be conveniently picked and replaced, and the problem of gingival injury caused by picking and replacing by virtue of a tool is avoided.

The application discloses a high-bearing low-noise special gear precision machining process, which comprises the following steps: precision die forging and isothermal normalizing, double-reference composite finish turning, self-adaptive roll-scrub composite near-net forming, segmented and partial-pressure gradient carburizing and quenching, deep cryogenic graded aging, reference reconstruction flexible honing polishing, pulse laser shock strengthening, tooth root fillet roll strengthening, full-parameter precision detection, hierarchical selection and micro-correction. The application solves the problems of large deformation, low precision, poor fatigue and high noise in traditional processes through the synergistic control of forming-stress-precision-surface morphology, and the special tooth profile is stably up to DIN 4-5 level, the tooth surface is Ra≤0.2 microns, the fatigue life is increased by more than 60%, and the noise is reduced by 6-10 dB. The process combination is not obvious and has outstanding creativity, and is suitable for high-precision batch manufacturing of special gears of high-end equipment such as new energy vehicles and high-speed heavy-duty transmission.

The utility model provides a screw rotor and a vacuum pump. The screw rotor comprises a rotating shaft and a plurality of rotor blades, the plurality of rotor blades are sleeved on the rotating shaft; each rotor blade comprises a tooth top part, a tooth root part, a chamfer surface and an end surface; the end face is configured to be penetrated by a rotating shaft. The tooth top is provided with a tooth top surface, and the tooth root is provided with a tooth root surface; one side of the chamfered surface is connected with the edge of the tooth top surface, and the other side of the chamfered surface is connected with the edge of the end surface; the tooth root face is provided with a concave part, and the side wall of the concave part is matched with the chamfer face. According to the screw rotor, the chamfered surfaces are arranged at the tooth tops of the rotor blades, and the concave part side walls matched with the chamfered surfaces at the tooth tops are correspondingly arranged at the tooth root parts, so that the machining error caused by secondary positioning of a rotating procedure is avoided on the basis of reducing a gap in the meshing process of the screw rotor; therefore, the sealing precision of the vacuum pump is improved, and finally the working efficiency of the vacuum pump comprising the screw rotor provided by the utility model is improved.

The invention discloses a cycloidal gear tooth profile three-section modification method. The cycloidal gear tooth profile is divided into a tooth root section, a meshing area section and a tooth top section; according to the thickness of the lubricating oil film, the modification gap at the tooth root is obtained, and according to the contact deformation at the tooth crest, the modification gap at the tooth crest is obtained; and by taking the return difference and the minimum contact stress in the dynamic transmission chain precision interval as boundary conditions, the modification clearance of the meshing area is obtained, the modification clearances at the tooth root, the meshing area and the tooth top are combined, and the tooth profile of the cycloidal gear is obtained according to the modification clearance curve. Different modification gaps can be designed according to different return differences and dynamic transmission chain precision intervals. A cycloidal gear tooth profile with controllable return difference and dynamic transmission chain precision and minimum contact stress when lubrication and stable and uniform meshing of a gear pair are considered can be obtained; the method is a modification method with higher precision.

This invention discloses a gear mold, an in-cavity sensing structure, a measurement system, and a measurement method. The gear mold includes at least one mold wall constituting the gear mold cavity. The in-cavity sensing structure includes a temperature sensing component and a pressure sensing component. The temperature sensing component includes at least a plurality of probes arranged in an array along key cavity positions. The key cavity positions include at least two of the gear's tooth tip forming area, tooth root forming area, and gate area. The pressure sensing component includes at least a plurality of ejector pins arranged in an array below the gear mold cavity. One end of each ejector pin abuts against a pressure sensing element. The probes are electrically connected via lead wires passing through the mold wall, and the pressure sensing element is electrically connected via a lead wire storage portion pre-embedded in the gear mold. Through an integrated sensing array layout deeply coupled with the gear mold structure, synchronous, direct, and in-situ monitoring of multi-point temperature and distributed pressure within the cavity during the precision gear injection molding process is achieved.

The present application relates to saw blade manufacturing technical field, and discloses a band saw blade manufacturing method and band saw blade, and the manufacturing method comprises the following steps: step S1, precision edge cutting;Step S2, tooth profile forming;Step S3, heat treatment strengthening;Step S4, composite straightening;Step S5, high-frequency welding;Step S6, partition roller pressing strengthening;Step S7, adaptive finishing;Step S8, closed-loop quality control;Band saw blade, hard alloy cutter head brazing is formed in the sawtooth part of tooth holder, and the multiple parallel roller pressing bands formed by partition roller pressing strengthening;Through the cooperation of partition roller pressing strengthening and adaptive finishing, the number and width of roller pressing areas are dynamically configured according to the width of band saw blade, reasonable isolation zones are set between adjacent roller pressing bands, local strengthening is realized, and the bending strength and fatigue resistance of tooth root are enhanced;According to the pitch, the process route is selected, and the tooth is ground after roller pressing strengthening or the tooth is ground before roller pressing, and the safety distance of roller working area and tooth root is reasonably controlled.

The application discloses a high-speed high-load low-vibration multi-engagement-zone gear and a tooth profile design method thereof, wherein the high-speed high-load low-vibration multi-engagement-zone gear comprises a first gear and a second gear, a tooth profile curve of the first gear comprises a first tooth crest curve segment L3, a first involute curve segment L2 and a first tooth root curve segment L1, a tooth profile curve of the second gear comprises a second tooth crest curve segment L3', a second involute curve segment L2' and a second tooth root curve segment L1', and the first tooth crest curve segment L3 and the second tooth root curve segment L1' are continuously engaged, the first involute curve segment L2 and the second involute curve segment L2' are continuously engaged, and the first tooth root curve segment L1 and the second tooth crest curve segment L3' are continuously engaged during the engagement of the first gear and the second gear. The application can effectively bear higher load, improves the load bearing capacity and the end face coincidence degree of the gear pair, and can make the transmission process more stable and better adapt to high-speed working conditions.

The application discloses a lock tooth integrated bucket tooth, which comprises a tooth root, a tooth seat assembly and a tooth tip assembly. One end of the tooth root is connected with a bucket body, and the other end of the tooth root is matched with one end of the tooth seat assembly, so that the tooth root and the tooth seat assembly have a combined first state and a separated second state. The other end of the tooth seat assembly is matched with one end of the tooth tip assembly, so that the tooth seat assembly and the tooth tip assembly have a combined third state and a separated fourth state. The other end of the tooth tip assembly is a free end. The application has a clever structure and reliable connection. During on-site disassembly and assembly, only a hexagonal wrench and a hook are needed to complete the on-site disassembly and assembly, and the problems of complicated operation, low efficiency and easy falling of the locking pin caused by defects of the prior art can be effectively solved.

This invention discloses a continuous induction hardening device for sprockets, belonging to the field of hardening technology. It includes a hardening frame filled with coolant; a hardening section installed inside the hardening frame for induction heating of the sprocket; and a loading section installed at the bottom of the hardening frame for picking up and feeding the sprocket. In this device, the induction coil is curved to match the arc-shaped tooth profile of the sprocket. The upper and lower effective heating sections correspond to the upper and lower tooth roots, respectively. The heat source preferentially acts on the thicker part of the tooth root, ensuring sufficient heat input. Simultaneously, a rotary motor drives the sprocket to rotate. For sprockets with greater thickness, a side coil can be added to assist in heating the tooth sides, avoiding the problem of overheating in the main heating zone and insufficient heating of the side walls. This improves upon existing circular induction coils where the tooth tip heating rate is much faster than the tooth root during hardening, effectively reducing the risk of hardening cracks caused by the significant difference in heating rates and improving the quality of the finished sprocket.

The present invention belongs to the technical field of research, development and testing of aircraft engines, and particularly relates to a tooth root patch mold, a method for making the same, and a method for installing a strain gauge. By using a tooth root patch mold to replace tape and rubber, the proposed tooth root patch mold has consistency. The small recessed cavity at the bottom of the tooth root patch mold formed after removing the small-sized strain gauge has the function of fixing the small-sized strain gauge, accurately positioning the strain gauge and well controlling the thickness after bonding. It can ensure that the position and final thickness of the strain gauge remain consistent during multiple pasting processes, and can solve problems such as uneven adhesive layer and excessive thickness leading to failure caused by pressurizing the strain gauge. The tooth root patch mold adopts a process of curing and molding from the outside to the inside, which can effectively avoid problems such as stress concentration in the mold corners and size reduction caused by volume shrinkage during the curing of the photosensitive resin. A loading rod is provided in the mold, which can be used to apply pressure for a long time for the adhesive to be heated and pressurized for curing.

The invention discloses a gear broken tooth failure diagnosis method and a related device under a friction dynamics coupling condition, and relates to the technical field of gear broken tooth failure diagnosis, and the method comprises the steps: solving a dynamics model in a gear transmission process under the friction dynamics coupling condition, the method comprises the following steps: obtaining a rotation angle of a driving gear and a rotation angle of a driven gear, further calculating to obtain gear tooth root bending stress and a gear bending fatigue safety coefficient, and decomposing vibration signals in a transmission process of the driving gear and the driven gear by utilizing an ICEEMDAN algorithm when determining that a tooth breakage risk exists based on the gear bending fatigue safety coefficient. And further determining a support vector, calculating a distance between the support vector and a sphere center of a reference hypersphere constructed by using an SVDD algorithm, and calculating to obtain a gear health degree based on the distance so as to complete gear tooth breakage failure diagnosis. According to the method, the calculation precision of the gear tooth root bending stress and the diagnosis precision of gear tooth breakage failure diagnosis can be improved.

A vehicle seat adjustment mechanism includes a first component and a second component that is movable relative to the first component. A drive mechanism is drivingly connected to the second component for moving the second component relative to the first component. The drive mechanism includes a drive motor drivingly connected to a first gear member having conical involute teeth. A second gear member includes conical involute teeth in meshing engagement with the conical involute teeth of the first gear member. The conical involute teeth have a tapered tooth thickness, a tapered root and a tapered outside diameter.

A stator lamination includes a middle part, an annular yoke, and a plurality of stator teeth. The middle part includes a central hole. The plurality of stator teeth extend from the inner side of the annular yoke and are evenly distributed. A wire slot is formed between every two adjacent stator teeth, whereby the annular yoke includes a plurality of wire slots. Each of the plurality of stator teeth includes a tooth root and a pole shoe disposed at one end of the tooth root. The stator lamination has an outer diameter ranging from 61.75 mm to 68.25 mm, and the central hole has a diameter ranging from 31.6 mm to 35 mm. The plurality of wire slots are evenly distributed around an edge of a circle, and the bottom part of each wire slot is tangent to the circle.

The present invention relates to the technical field of pinion transmission, and provides a pure rolling pinion-and-rack mechanism having parabolic function-based tooth profiles and hyperbolic tooth traces, comprising a pinion and a rack. A transverse tooth profile of each of the pinion and the rack consist of a transverse working tooth profile curve and a root transition curve, and the transverse tooth profiles of the pinion and the rack are both bilaterally symmetrical; the transverse working tooth profile curves of the pinion and the rack are parabolas; the tooth surfaces of the pinion and the rack have a hyperbolic tooth trace structure; and at least one pair of tooth meshing points of the pinion and the rack are located at nodes to achieve pure rolling meshing contact, and a meshing line formed by a movement trajectory of the meshing points of the pinion and the rack form two contact lines on the tooth surfaces of the pinion and the rack, respectively. The present invention has the advantage effects that: the contact lines are axisymmetric hyperbolas after being unfolded on a pitch cylinder surface to eliminate axial force, the theoretical value of the relative sliding speed of all meshing points on the contact lines is zero, the tooth profile tooth surface is a meshing tooth surface without relative sliding, the friction loss and noise are significantly reduced, and the transmission efficiency is greatly improved.