235 results about "Large teeth" patented technology

Apparatus, system, and methods for utilizing one or more computing devices to stage the movement of teeth during an alignment treatment are disclosed. The computing device receives an electronic representation of the patient's teeth in their initial position and an electronic representation of the teeth a final position for each tooth. A route each tooth will travel to reach its final position is determined, and the teeth are scheduled to move according to a movement pattern. Moreover, the schedule of movement takes into account a maximum rate of tooth movement for each tooth, the path of movement for each tooth, the distance each tooth needs to move, any needed tooth staggering, any needed round-tripping or tooth movement slowing. The invention also includes techniques for determining an optimum number of stages for the treatment based on the schedule of movement.

The invention discloses an engine position management system. The engine position management system comprises a crankshaft signal panel, a crankshaft position sensor, a camshaft signal panel, a camshaft position sensor and an eTPU control unit, wherein the crankshaft signal panel comprises multiple convex teeth and tooth gaps; the tooth gaps have a large tooth gap for positioning; and the camshaft signal panel comprises three convex teeth with different central angles and tooth gaps. The eTPU control unit comprises a crankshaft signal processing module, a crankshaft fault diagnosis module, a camshaft signal processing module, a camshaft fault diagnosis module and a limp return and synchronous logic processing module. The engine position management system can use crankshaft signals and camshaft signals for realizing quick cylinder judgment and synchronization of an engine when the camshaft position sensor and the camshaft position sensor are normal, and can use another sensor for realizing the cylinder judgment synchronization and providing the angle information with limited precision to realize the limb return of the engine when one sensor is broken down. The invention further provides a management method of the engine position management system.

The robot automatic detection system for extra-long pipeline welding seam includes three portions of partial type fixing support seat, partial type periphery-directional rotating mechanism and robot arm. The partial type fixing support seat adopts movable slide block structure, the partial type periphery-directional rotating mechanism is formed from motor, planetary pinion, large teeth ring and upper and lower connecting plates. The partial type fixing support seat is fixed on the detected branch pipe by means of fast positioning connecting device so as to form mounting platform of said detection system and location reference, and the partial type periphery-directional rotating mechanism is mounted on the platform.

The invention provides a technique for quenching along the tooth space of a large tooth ring with hardened tooth surfaces on a medium-frequency basis, particularly for quenching and tempering the tooth surfaces along the tooth space on a medium-frequency induction basis. The technique comprises the following steps: 1), carrying out the tool preparation and on-site installation before quenching and tempering; 2), manufacturing medium-frequency copying inductors heating-quenching along the tooth space and taking the shape similar to the profile of the tooth space, and quenching and back-cooling the tooth surfaces in a synchronous manner; 3), quenching at intervals of 3 tooth spaces, wherein, one round of the rotation of the parts, that is, 54 teeth, constitutes a working cycle; 4) testing the hardness of a first quenching tooth surface every cycle; and 5), carrying out the tempering heat treatment in a half-tooth ring manner after the surface is quenched. The quenching level of the tooth surfaces of the large tooth ring with the hardened tooth surfaces reaches HRC40-45; the depth of effective hardening layers is larger than or equal to 4mm; the accuracy of the tooth wheel reaches the 988GE level; the tooth ring has the advantages of light and handy structure, large size and service life as long as two times of the ordinary tooth ring with the same specification; and the technique remarkably reduces the weight of the equipment, improves the reliability thereof, and improves the running efficiency thereof.

The invention relates to a hybrid four-shaft transmission device, which comprises an outer gear ring, a planet carrier, a planet row and sun gears and is characterized in that: the planet row has a double-planet row structure consisting of a front planet row and a back planet row; the front planet row and the back planet row correspond to a sun gear respectively; a front row of planetary gears have small tooth widths and large reference circles; a back row of planetary gears have large tooth widths and small reference circles; the front row of planetary gears are meshed with the outer gear ring and a small sun gear so as to form a front row gear train; and the back row of planetary gears are meshed with the front row of planet gears and a large sun gear so as to form a back row gear train. A double-planet row four-shaft transmission device with a large transmission ratio between the sun gear of the back row gear train and the outer gear ring is realized.

A burnishing Burr drill having more than two large teeth and more than one small tooth formed on each back surface of the large tooth is disclosed. Large teeth is mainly used for cutting and obtaining a high feed speed. As the burnishing drill feed forward, the small teeth will meet a surface of a hole drilled by the large teeth and further finish a wall of the hole.

The device is a precision motion right angle drive for use with linear and rotary stages which employs a combination of globoid worm and small diameter star gear. Coaxial with the star gear, on the same shaft, is a spur gear which drives the rotary stage gear or a linear rack. The thin star gear achieves meshing accuracy with the globoid worm permitting a large tooth angle for direct preloading without jamming. This gear combination eliminates backlash, allows a low gear ratio for low globoid worm speed, and enables the use of an ordinary spur gear to engage the stage gear without backdrive or backlash. Further, it allows for gear contact area to compensate for the thinness of the star gear. An embodiment including an integrated bearing rotary stage permits flexibility of application and avoidance of need for custom bearing designs by achieving high motion precision at low cost.

Provided are a non-metallic V-shaped cutting blade capable of cutting roll-shaped packaging materials such as wrapping films with very light force, and a packaging container provided with the cutting blade. The cutting edge (24) of the present invention includes a central region (28) and side regions (30) that are arranged on both sides of the central region and are composed of a plurality of side teeth (31). A middle tooth (36) and a plurality of large teeth (38). One of the large and medium teeth is arranged at the apex of the V-shape, and the other large teeth are arranged at predetermined intervals so as to sandwich the teeth at the apex. The middle teeth are arranged between the large teeth. The large gear is more prominent than the middle gear. With this structure, when the cutting starts, the large teeth pierce the wrapping film (14) first, and then the middle teeth pierce the wrapping film. Since the wrapping film is pierced through such two stages, the force required for cutting is small.

The invention discloses a measuring point accurate positioning method of a generated involute tooth profile measuring apparatus and belongs to the field of high-precision gear measurement by testing and measuring technology. A tooth profile angle comparison method compares tooth profile deviation curves measured by a measuring head at different positions to determine the position of a measuring point corresponding to a measured curve having the largest tooth profile angle as an optical position. A measuring point deviation value test compensation method tests values of the deviation of the position of a measuring point one by one and compensates for involute tooth profile deviation measured when the measuring point is at two positions having a known height difference by analyzing the influences of measuring point deviation on tooth profile deviation measurement to determine a value equal to the value of compensated tooth profile deviation as the deviation of the measuring point at an initial position. The measuring point accurate positioning method has high accuracy and can be widely used for accurate adjustment of the positions of measuring points in other high-precision generated involute tooth profile measuring apparatuses.

A light single button multi-function electric hammer comprises a body, a motor, a rotation set assembly (1), a cylinder assembly (6), a torque spring (2), a knob (26), a gearwheel and a transmission mechanism of torque clutch. The transmission mechanism of torque clutch comprises a pinion (7), a gear clutch (8), a middle shaft (10), a hammer crosspiece clutch (9), a swing rod bearing (11) and a primary gear (12). The pinion is movably fitted with the middle shaft; the pinion meshes the large end teeth of the gearwheel and matches with the inner teeth of the gear clutch. The gear clutch meshes the small end teeth of the gearwheel and is fitted with the teeth shaft of the middle shaft. The gear clutch and the hammer crosspiece clutch are movably fitted with the teeth shaft of the middle shaft. The swing rod bearing is movably fitted with the middle shaft and is connected with the cylinder assembly through the swing rod. Matched concavo and convex slots are set on the hammer crosspiece clutch and swing rod bearing. The primary gear is tightly fitted with the middle shaft. The knob is connected with an operating mechanism linked to the large teeth end of the gearwheel, the gear clutch and the hammer crosspiece clutch. The electric hammer enables a simple and compact structure, flexible and convenient conversion, low cost, safe and reliable use.

The invention discloses a mining differential three-roller tooth crusher, which comprises a front roller screen, a large tooth roller (6), a small driven tooth roller (7), a small driving tooth roller (8), a small tooth roller transmission gear (11) and a driving device, wherein the front roller screen is provided with six rollers (2) with wear-proof shaft sleeves; transmission between every two adjacent rollers (2) is realized through a roller idle wheel (3); each roller (2) is arranged according to a uniform thickness probability screening principle; materials are subjected to probability uniform-thickness screening after entering the roller screen from a feed end, a great amount of small materials are rapidly screened, and a small amount of large materials are rapidly conveyed to a three-roller crushing cavity; the three-roller crushing cavity is provided with a large crushing tooth roller and two small crushing tooth rollers; the materials are crushed through the three rollers in multiple stages under the comprehensive action of shearing, stretching and bending crushing mechanisms. The mining differential three-roller tooth crusher has the characteristics of high working efficiency, high processing capacity, high reliability, low energy consumption, no blocking, capability of avoiding excessive crushing of the materials and the like.

The invention discloses a turning gear of a steam turbine, comprising a driving motor, a reducer, a swinging gear, a large tooth ring and a clutch mechanism of the swinging gear which are connected in sequence; the large tooth ring is arranged on a rotor of the steam turbine and the reducer is provided with a multilevel speed-reducing transmission pair; the first-level speed-reducing transmission pair of the reducer is a planetary gear transmission box, a second-level speed-reducing transmission pair is an umbrella gear transmission pair and the rest is a planar gear speed-reducing transmission pair; a buffering spring is arranged between an inner tooth ring of the planetary gear transmission box and the box; the bearings of the swinging gear and the planar gear are rolling bearings; the swinging gear is positioned below the middle section of the rotor of the steam turbine and is corresponding to the large tooth ring in a tangential mode. The invention has the advantages of compact structure and small occupied area and has the buffering function with safety and reliability and without miscarriage when in use.

The invention relates to a selection and culture method of excellent breed large-tooth flounder featuring fast growth and high survival rate. The technical method comprises: culture and reproduction regulation and control of large-tooth flounder breeding group, establishment of family by sperm freezing technology, culture and standardization of the family, determination and analysis of number and properties, estimation of genetic parameters, screening of excellent family, and establishment of excellent breed by inducing thelykaryon of large-tooth flounder to develop by using heterologous frozen sperms. The invention can select and culture new breed of cultured large-tooth flounder featuring fast growth and high survival rate, screen out four excellent large-tooth flounder families featuring fast growth and high survival rate (0703, 0719, 0750 and 0751), and establish seven excellent breeds of large-tooth flounder developed from thelykaryon (0920, 0921, 0927, 0938, 0939, 0946 and 0947). The technical method can be applied to new variety culture of large-tooth flounder cultivation, solve the problems of culturing large-tooth flounder fish in sea water such as slow growth and low survival rate, and enhances economic benefit of large-tooth flounder cultivation.

A pump rotor is an inner rotor of an internal gear pump, the inner rotor having a tooth profile, wherein a half-tooth portion of the tooth profile is formed of three tooth-profile formation circles that are elliptical or true-circular. Two of the tooth-profile formation circles are a combination of a small tooth-profile formation circle and a large tooth-profile formation circle in which the small tooth-profile formation circle is inscribed and is entirely included. A portion of the small tooth-profile formation circle forms an addendum portion of the half-tooth portion. A portion of the large tooth-profile formation circle in which the small tooth-profile formation circle is inscribed and is entirely included forms an engagement portion of the half-tooth portion. A portion of another tooth-profile formation circle that circumscribes the large tooth-profile formation circle forms a dedendum portion of the half-tooth portion.

The invention discloses a lock washer manufacturing method and a lock washer. The manufacturing method comprises the following steps that (1), the lock washer which is made of stainless steel and has a tooth structure is manufactured, wherein the tooth structure is that the included angle between a long edge and a short edge of the cross section of a small tooth is 80-110 degrees, the depth of the small tooth is 0.1-0.3 millimeter, the included angle between the long edge of the cross section of the small tooth and the base plane of the washer is 5-10 degrees, and the included angle A between the long edge of the cross section of a large tooth and the base plane of the lock washer is larger than the lead angle B of a matched bolt or nut by 0.1-1 degree; (2), the surface of the lock washer is processed, and a passivated layer on the surface of the lock washer is removed; (3), the lock washer after processing of the step (2) is subjected to low-temperature carburization, or low-temperature nitridation or low-temperature nitrocarburizing, and a hardened layer is formed on the surface of the lock washer; (4), the finished lock washer is finally manufactured after washing. The lock washer manufactured through the manufacturing method is good in lock effect and low in manufacturing cost.

The invention relates to a communication-in-moving satellite antenna with a low profile. The communication-in-moving satellite antenna comprises a receiving part and an emission part which are same instructure, wherein the receiving part comprises an upper-layer phase modulation surface, an intermediate-layer phase modulation surface, a lower-layer feeding source surface and a rotation mechanismwhich are sequentially arranged from top to bottom, the rotation mechanism comprises an upper-layer large ring gear, an intermediate-layer large ring gear, a lower-layer large ring gear and a rotationdriving device, and the rotation driving device drives the lower-layer large ring gear, the intermediate-layer large ring gear and the upper-layer large ring gear to rotate so as to achieve rotationof the lower-layer feeding source surface, the intermediate-layer phase modulation surface and the upper-layer phase modulation surface. The beam pitching angle of the satellite antenna is adjusted according to angle difference between the upper-layer phase modulation surface and the intermediate-layer phase modulation surface which are driven by the upper-layer large ring gear and the intermediate-layer large ring gear to rotate, the upper-layer phase modulation surface and the lower-layer phase modulation surface simultaneously rotate, the beam directional angle of the antenna is adjusted according to a rotation angle, the lower-layer feeding source surface is driven to rotate by the lower-layer large ring gear so as to adjust a polarization angle of the satellite antenna, polarization adjustment is achieved, and a main beam of the antenna points to a satellite all the way during the moving process on a vehicle, an airplane and a boat and is maintained within certain accuracy.

The invention discloses a gear with large tooth lead modification quantity and a processing method thereof. the modification coefficient of a tooth shape of the upper end face of the gear with large tooth lead modification quantity is x, and the common normal line of the tooth shape of the upper end face is W; the modification coefficient of the tooth shape of the section at a position, spaced from the upper end face by a, on the gear with the large tooth lead modification quantity is xa, and the common normal line of the tooth shape of the section at the position, spaced from the upper end face by a, on the gear with the large tooth lead modification quantity is Wa; the intersecting line of the left tooth surface and the cylindrical surface of the reference circle is a molded line AD, and the intersecting line of the right tooth surface and the cylindrical surface of the reference circle is a molded line BE; an intersection between the molded line AD and the upper end face X is a point A, and an intersection between the molded line AD and the lower end face V is a point D; an intersection between the molded line BE and the upper end face X is a point B, and an intersection between the molded line BE and the lower end face V is a point E; a point F is a projection of the point A on the lower end face V in the axial direction U; a point G is a projection of the point B on the lower end face V in the axial direction U. The processing method comprises a step of 1, performing hobbing processing on a gear blank, and further comprises a second step and a third step. According to the processing method, the tooth direction grinding modification quantity can be reduced, and the defects, such as reduction of the hardness of the tooth surface, caused by a large tooth grinding amount are avoided.

The invention discloses an optical fiber connector plug which comprises a front sleeve, a back sleeve and a coupling nut. A movable ratchet wheel and a static ratchet wheel which are arranged front and back are sleeved with the front sleeve, the back end face of the static ratchet wheel is provided with a positioning which is in positioning and rotation stopping fit with the back sleeve, the front end face of the static ratchet wheel is provided with a ring of static ratchets, positioning keys matched with the coupling nut are arranged on the peripheral surface of the movable ratchet wheel, the back end face of the movable ratchet wheel is provided with a ring of movable ratchets meshed with the static ratchets, and the movable ratchets and the static ratchets are each provided with a large tooth surface and a small tooth surface with the different inclination angles. When the plug is in threaded connection with a socket, the coupling nut can drive the movable ratchet to rotate, and the static ratchet does not rotate; when the coupling nut rotates forwards to be locked, the rotation locking torque of a coupler is small; when the coupling nut rotates reversely to be loosened, the rotation loosening torque of the coupler is large; by mutually connecting the coupling nut with the movable ratchet and the static ratchet, the anti-loose purpose on threaded connection of the plug and the socket can be achieved.

The invention discloses a rotating mechanism of a gate seat type crane. A rotating platform (1) is fixedly connected with a rotary support inner ring (2); the rotary support inner ring (2) is connected with a rotary support large tooth ring (5) in a rolling manner through a steel ball (4) and can rotate in the rotary support large tooth ring (5); the rotary support large tooth ring (5) is fixedly connected with a circular base plate (13) through a fastening bolt (6); two same transmission gears (11) are symmetrically distributed on two sides of the rotary support large tooth ring and are meshed with the rotary support large tooth ring; a motor (7) is connected with the transmission gears (11) through a speed reducer (8) and a transmission gear shaft (9) and drives the transmission gears (11) to rotate; the transmission gears (11) enable the rotating platform (1) to rotate under the action of counterforce. Resultant force of radial force on the rotating support inner ring is zero, so that single-edge abrasion between the rotary support large tooth ring and the steel ball is avoided.

The invention provides a design method for a tooth profile of a double-base cone spiral bevel gear and relates to gears. According to the double-base cone spiral bevel gear, five conical surfaces, four cone angles and two base cones are arranged; the normal tooth profile of each gear tooth comprises an addendum circle, a root circle, a driving side tooth curve, a non-driving side tooth curve and a tooth directional line; the five cone surfaces are a surface cone, a root cone, a pitch cone, a back cone and a front cone respectively; the four cone angles are a face angle, a root angle, a pitch angle and a back angle respectively; for vehicles with gear transmission mechanisms mainly depending on one-way transmission, the property of the spiral bevel gear is improved; the design method for the tooth profile of the double-based cone spiral bevel gear provided by the invention has the advantages that as large tooth profile angles are adopted in the driving surface and small tooth profile angles are adopted in the non-driving surface, the bearing capacity of the gear in the driving direction is increased and the top of tooth is prevented from being tapered, the bearing capacity, fatigue life and output torque of the spiral bevel gear are improved effectively and the vibration and noise in the transmission are reduced.

The invention relates to a 12-gear full-helical-tooth double-intermediate-shaft all-synchronizer gearbox which adopts a design of combination of a three-section closed structure shell and main and auxiliary gearboxes. The main gearbox is of a small-center-distance double-intermediate-shaft structure and gears adopt large-tooth wide helical teeth, so that the bearing capacities and the meshing stabilities of the gears are improved, the meshing noise is reduced and the bearing cavity of the main gearbox is improved. Due to the adoption of an input drop-and-insert structure, the gear speed ratio order difference is small and the fuel economy is high. Double-cone inertial type of synchronizers are respectively and additionally arranged at an inverted first gear and second and third gears, so that the friction moments of the synchronizers are increased, the gear shifting force is reduced and the impact and noise which are generated in the gear shifting process are reduced. Due to the adoption of a helical tooth planet gear system structure, the bearing capacities of the gears are improved; and a planet gear system is designed with the axial limit, so that the helical tooth axial force is offset inside. Due to the adoption of an installing form of an auxiliary gearbox synchronizer, the torque states of a planet carrier at the high and low gears in a certain range are optimized and the torsional strength of a planet carrier assembly is greatly improved. By the double-support design of both the front and rear ends of the planet carrier, the influence of finished automobile factors on the normal work of the inside of the gearbox is reduced.

The invention discloses a recombinant large-tooth flounder interleukin-6 protein and a preparation method thereof. The preparation method comprises the following steps: according to a DNA sequence of the large-tooth flounder interleukin-6 protein of paralichthys olivaceus, designing a primer and extracting the total RNA of the kidney fresh by a TRIzol Reagent method, carrying out RT-PCR augmentation, connecting a PCR product and a Pmd19T vector to form a recombinant plasmid, connecting with an expression vector Pet-32a(+) by double digestion, obtaining the recombinant plasmid and transforming the recombinant plasmid into escherichia coli BL21 (DE3); and realizing the soluble expression of the recombinant protein. As the expression process does not generate an inclusion body, the fusion protein for expressing the plasmid has histidine tags, thus being convenient to identification and purification of samples, avoiding the denaturation and renaturation of the samples, having simple operation, reducing the manufacturing cost, and more importantly, having no damage to a protein structure; and the invention has good purity of recombinant protein, high yield and difficult degradation, is applicable to industrial production and lays the foundation of studying the large-tooth flounder interleukin-6 protein of the paralichthys olivaceus.