7079 results about "Gear tooth" patented technology

The invention discloses a high-precision and high-reliability harmonic reducer tooth profile simulation machining design method, and belongs to the field of precision transmission. A composite cycloid flexible gear tooth profile is designed by establishing a harmonic reducer geometrical relationship model, deducing a flexible gear deformation equation, an accurate rotation angle relationship and a meshing theory based on an envelope method, and a conjugate region and a conjugate tooth profile are calculated by utilizing MATLAB. Actual deformation and theoretical deformation errors of the flexible gear are analyzed through finite element simulation, flexible gear profile parameters are optimized, an actual neutral layer curve is generated, and then a rigid gear profile is enveloped and calculated. The tooth profile design adopts a non-zero inclination angle composite cycloid, so that the meshing area is expanded by more than 30%, and the maximum stress of the flexible gear is reduced by 22.75% in combination with a linear modification method and a finite element modification method. In addition, through a multi-physical field simulation verification system (including static deformation, dynamic contact and fatigue life prediction) and a neural network optimization tooth shape parameter, the transmission performance is remarkably improved. According to the method, the torsional rigidity can be improved by 66%, and the transmission error is controlled within a high-precision range.

The invention relates to the technical field of gear machining detection, and particularly discloses a gear machining detection device which comprises a machining table. A pair of first sliding blocks is slidably arranged on the top face of the machining table. Concave frames are fixedly connected to the top surfaces of the pair of first sliding blocks; a first motor is mounted on the outer side wall of the concave frame; the output end of the first motor is coaxially and fixedly connected with a rotating roller; a plurality of clamping tooth blocks are mounted on the peripheral surface of the rotating roller; the plurality of tooth clamping blocks can be respectively matched with different gears to be detected and are clamped in gear teeth of the gears to be detected; the machining table is provided with a driving mechanism capable of driving the pair of first sliding blocks to move in the face-to-face or back-to-back mode. A detection mechanism capable of detecting the hardness of the gear to be detected is arranged on the processing table; the first motor is started to drive the rotating roller to rotate, the tooth clamping block matched with the to-be-detected gear on the rotating roller is promoted to rotate to a designated position, so that the to-be-detected gears of different sizes can be clamped, the trouble of replacing a clamp is reduced, and the detection efficiency is improved.

A folding frame and an outdoor table or outdoor chair using the folding frame. The folding frame comprises a base, a plurality of support legs hinged around the base, a plurality of extension support bars hinged on the support legs and capable of folding, and a locking mechanism. The base is provided with a plurality of gear racks. Both sides of each gear rack are configured with vertically distributed first teeth part. Both sides of the upper end of the support leg are configured with circularly distributed second teeth part. The upper end of the support leg is positioned between two gear racks, and the second teeth part of the support leg mesh with the first teeth part of the gear rack. When the locking mechanism can lock the unfolded support legs, the gear rack also locks the support legs.

The invention belongs to the technical field of metal part surface modification, and relates to a composite strengthening method for a carburized surface of a high-bearing gear of an aero-engine. According to the method, high-hardness and high-density ceramic shots are adopted as media for high-energy mechanical shot peening strengthening, the advantage that the subsurface strain hardening effect of the contact strengthening technology is good and the barb-shaped distribution characteristic of mechanical shot peening residual compressive stress are utilized, extremely high residual compressive stress is introduced to the subsurface position, and the contact fatigue performance of the tooth surface of the gear is improved. High-frequency laser shot peening strengthening is used for secondary treatment, so that the surface layer of the material is subjected to plastic deformation, high-amplitude residual compressive stress is introduced into the surface layer of the material within the depth range of more than 500 microns by utilizing the advantage of large influence depth of laser-induced shock waves, and the residual compressive stress can inhibit fatigue crack initiation, has a certain depth and inhibits fatigue crack propagation; and the bending fatigue resistance of the root of the gear can be effectively improved. And an abrasive flow process is adopted, so that the roughness is reduced to be more than 0.4 mu m.

The invention relates to the technical field of universal joint fork lug hole grinding, and discloses a universal joint fork lug hole grinding device which comprises a workbench, a fixing mechanism used for fixing a universal joint fork and two grinding mechanisms provided with grinding machines in a clamping mode are arranged on the workbench, and the fixing mechanism comprises a rotating ring rotationally connected to the workbench; gear teeth are arranged on the outer side of the rotating ring, a jacking device and a supporting device are arranged on the inner side of the rotating ring, a jacking block is arranged in the jacking device and provided with a jacking face, a supporting seat is arranged in the supporting device, a shaft rod part of the universal joint fork slides in the supporting seat, and a supporting spring is further arranged in the supporting seat. The jacking block is used for pushing the earhole to the position concentric with the rotating ring, the rotating ring is driven by the connecting driving mechanism to rotate, and a grinding head on the grinding machine is tangent to the side, close to the jacking device, in the earhole. The device has the advantages that the lug hole is accurately positioned, the polishing head and the yoke rotate simultaneously to improve the polishing precision, and the polishing strength can be adjusted.

The invention provides a fault diagnosis method and system for a spindle box of a high-speed gear milling machine based on fault mechanism simulation and data fusion. The method mainly comprises the following steps: S1, calculating a tooth profile wear curve of a gear based on an Archard wear principle; s2, three-dimensional modeling software is used for building system models in different wear states, and simulation data sets under different wear degrees are obtained with the help of dynamics simulation software; s3, establishing a data acquisition system to obtain an experimental vibration data set under the actual working condition of the spindle box; s4, constructing a spindle box fault diagnosis model by using the analogue simulation data set obtained in the step S2; and S5, performing fault diagnosis on the experimental vibration data set obtained in the step S3 by using the spindle box fault diagnosis model constructed in the step S4, and identifying the health condition of the spindle box system. Important data support is provided for a main axle box fault diagnosis and health management system, and the diagnosis accuracy and reliability are improved.

The invention relates to the technical field of laser cutting, and discloses a profile laser cutting device for steel structure production, which comprises a mounting frame, a traction component and a cutting mechanism are mounted on the mounting frame, the cutting mechanism comprises a circular track and a support body, a connecting support is mounted on the support body, and a movable support is slidably mounted on the connecting support. A laser head is rotationally installed on the movable support, a rotating shaft formed at the installation position is in power connection with a second motor, a gear ring is installed on the end face of the circular ring rail, a threaded shaft is installed on the support body and divided into two threaded sections with the opposite thread rotating directions, and the outer portions of the two threaded sections are each provided with a sliding support in a threaded mode. The sliding support is slidably connected with the support body, a sliding seat is slidably mounted on the circular track, a convex shaft extends on the sliding seat, the sliding support is movably connected with the convex shaft, a gear is mounted on the sliding seat and meshed with the gear ring, and the input end of the gear is in power connection with a first motor after penetrating through the convex shaft.

The invention discloses a side-mounted vacuum circuit breaker, which comprises a vacuum arc-extinguishing chamber, an operating mechanism and a side-mounted fixing piece, and is characterized in that the vacuum arc-extinguishing chamber is connected to the rear side of the operating mechanism through the side-mounted fixing piece; the operating mechanism comprises a box body, a spring, a main shaft, a second intermediate gear and a second lower driving gear, the spring, the main shaft, the second intermediate gear and the second lower driving gear are mounted in the box body, the main shaft is linked with an insulating pull rod of the vacuum arc-extinguishing chamber through a transmission mechanism, and the spring is connected to one end of the main shaft; the second intermediate gear is sleeved on the main shaft; the second lower driving gear is meshed with the second intermediate gear; a circle of gear teeth are distributed on the side face of the second intermediate gear, and the reference axis formed by the circle of gear teeth coincides with the reference axis of the second intermediate gear. An upper driving gear and a secondary transmission gear in the box body are omitted, an external second energy storage motor is adopted, the number of disassembly and assembly steps is smaller, and the maintenance efficiency is higher.

The invention discloses a nonlinear dynamic modeling method of a helical gear transmission system considering wear. The method comprises the following specific steps: step (1), establishing a time-varying meshing stiffness calculation model of a helical gear pair in a healthy state; (2) establishing a time-varying meshing stiffness calculation model of the wear fault helical gear pair; (3) establishing a helical gear tooth surface friction model under the condition of mixed elastohydrodynamic lubrication; (4) establishing a deformation equation of the tapered roller bearing; (5) establishing a helical gear transmission system model considering wear, and solving the nonlinear vibration characteristics of the helical gear transmission system under different wear degree faults of the helical gear; the method has the beneficial effects that the nonlinear dynamic model of the helical gear transmission system considering wear is established, and technical support is provided for related technologies of fault dynamic modeling of the current helical gear transmission system.

The invention relates to the technical field of machining equipment, in particular to a gear deburring device and method. The moving seat slides on the front side of the bottom frame, a two-way lead screw driven by a driving assembly is rotationally arranged between the inner walls of the moving seat, moving plates symmetrically slide on the moving seat, the front ends of the two moving plates are in threaded connection with one side of the two-way lead screw respectively, and a driving gear used for driving the gear body to rotate is arranged between the moving plates on the two sides; and the two cutters are respectively arranged at the tail ends of the two movable plates. The combination of the cutting knife, the steel wire brush and the grinding rod is adopted, accurate burr treatment is specially conducted on the two sides of the gear teeth, grooves between the teeth and the tooth surface, through the linkage design of the pushing rod and the moving rod, it is guaranteed that the steel wire brush and the grinding rod can be accurately positioned and work cooperatively, and unnecessary treatment area coverage is avoided; the whole burr removing process is more orderly and efficient, the smoothness of the tooth surface is guaranteed, and the problem of excessive loss possibly caused by using a large-range polishing wheel is solved.

The utility model discloses a floor sweeping robot shell injection molding mould, a vibration mechanism comprises a motor, two driven gears, a rack and a sliding chute, the motor is fixedly installed at the bottom of a base, the output end of the motor penetrates through the base and is fixedly connected with a driving gear, the two driven gears are symmetrically arranged front and back by taking the driving gear as the center, and the rack is fixedly connected with the driving gear. The two driven gears are meshed with the driving gear, gear shafts are fixedly connected to the driven gears, one end of each gear shaft is rotationally connected to the top of the base, the other end of each gear shaft is fixedly connected with a sector gear, the sector gears are meshed with a rack, and knocking assemblies are movably connected to the two ends of the rack. Relates to the technical field of injection molds, a motor drives a main gear to rotate, so that a rack drives a knocking assembly to impact the outer walls of an upper mold base and a lower mold base back and forth, the upper mold base and the lower mold base are fully filled with plastic melt, and the situation that product manufacturing is unqualified due to insufficient fluidity is avoided.

A compact lever mechanism for assisting in removing and inserting a sled in a chassis is disclosed. The lever mechanism has a longitudinal lever member. A spur gear having gear teeth is coupled to one end of the longitudinal lever member. An ejector component is rotatably connected to the sled. The ejector component has a frame defined by an internal gear support, a first support arm, and a second support arm. The spur gear is positioned within the frame and engages the internal gear support to rotate the ejector component. The first support arm includes a tab engaging a flange of the chassis to apply force to remove the sled from the chassis when rotated in a first direction. The second support arm includes a second tab engaging a cutout in the chassis to apply force to insert the sled in the chassis when rotated in a second direction.

The utility model provides an anti-deviation device for drilling, which relates to the technical field of drilling, and comprises a bottom plate and an adjusting plate, an anti-deviation mechanism is arranged in the adjusting plate, and the anti-deviation mechanism comprises a rotary table rotatably sleeved on the inner wall of the adjusting plate and a worm gear tooth assembly fixedly connected on the outer surface of the rotary table. According to the anti-deviation drilling device, anti-deviation work can be directly conducted on drill rod bodies of different sizes through the anti-deviation mechanism, the anti-deviation effect of the device is optimized, more stable drilling work can be conducted, the drill rod bodies are inserted into the rotary table, then the servo motor is started to work, when the servo motor is started, the worm can be driven to rotate, and the drill rod bodies are driven to rotate. When the worm rotates, the rotary table can rotate through the worm gear tooth assembly, when the rotary table rotates, the clamping rods can rotate through the sleeve blocks, and then the drill rod can be clamped in the middle through the movement of the three clamping rods, so that the drill rod cannot deviate; and meanwhile, the balls can achieve the effect of assisting in preventing the drill rod body from deviating.

The utility model relates to the field of gear detection, and discloses a gear tooth density detection device which comprises a supporting table, the upper surface of the supporting table is fixedly connected with a supporting plate, the upper surface of the supporting table is fixedly connected with a scale plate, a counting assembly is arranged in the supporting plate, and a distance measuring assembly is arranged on the upper surface of the supporting table. The counting assembly comprises a rotating shaft, a gear body is installed on the outer wall of the rotating shaft, a grip penetrates through and is fixedly connected to the upper surface of the rotating shaft, a positioning block penetrates through and is slidably connected to the upper surface of the supporting plate, and a threaded rod penetrates through and is in threaded connection with the right surface of the positioning block. According to the utility model, through the accurate cooperation of the counting assembly and the gear body, the accurate counting of the tooth number of the gear is realized, the distance measuring assembly is combined, the diameter of the gear is accurately measured, and then the tooth density is accurately calculated. A traditional measurement mode is abandoned, and the measurement precision and efficiency are improved.

The invention provides a crane mechanical arm welding tool, and belongs to the technical field of crane welding. The tool comprises a welding table, a positioning clamping plate, a pushing nut cylinder, a rack and a limiting baffle, a first supporting plate is fixedly arranged on the welding table, the positioning clamping plate is configured to slide along the welding table, the pushing nut cylinder is rotationally arranged on the first supporting plate, a pushing threaded rod is connected into the pushing nut cylinder through threads, and the positioning clamping plate is connected with the pushing threaded rod; a gear is fixedly arranged on the pushing nut cylinder, the rack is meshed with the gear, the rack is configured to move relative to the gear and used for driving the gear to rotate, the limiting baffle is used for limiting the moving distance of the rack, and the position of the limiting baffle is adjustable. The crane mechanical arm welding tool can meet the requirement for continuous welding of U-shaped steel plates and C-shaped steel plates.

An optimization method of the tooth profile modification of the cycloid gear is provided, and optimizes the method of equidistant-distance combination modification of the tooth profile of the cycloid gear, with the help of multi-objective optimization algorithm based on pressure angle of tooth profile, curvature radius and contact performance, the working range of the tooth profile modification of the cycloid gear is determined, and the optimal modification amount of the cycloid pin gear planetary reducer is determined, the tooth profile of the cycloid gear is modified to compensate these errors, ensure that it has reasonable tooth side clearance, lubrication and assembly, and improve the transmission efficiency and bearing capacity of the cycloid pin gear planetary reducer. The optimization method has the effects of high precision transmission, low noise operation, improving transmission efficiency, prolonging fatigue life and reducing space occupation.

The invention discloses a lifting platform for offshore pile top construction, and relates to the technical field of ocean engineering, the lifting platform comprises a main body mechanism, four lifting mechanisms are movably inserted in the inner surface wall of the main body mechanism, and two driving mechanisms are fixedly mounted on the outer surface walls of the four lifting mechanisms; the lifting mechanism comprises a fixing pile. According to the lifting platform, after the device is started, a motor can enable two half gears to synchronously and reversely rotate through a rotating shaft and a transmission gear, so that racks on the left side and the right side are sequentially driven to start to move, then the platform is driven to ascend and descend, and the platform is clamped by means of cooperation between two metal clamping blocks and positioning holes; compared with a traditional gear and rack clamping structure, the clamping tongue is matched with the fixing hole so that external interference can be better resisted and the stability of the lifting platform can be ensured on the sea where the environment is severe and stormy waves are large, meanwhile, the structure is relatively simple and reliable, the fault rate is low, and therefore the construction safety is improved.

The invention relates to the technical field of tooth crest gap leakage, discloses a gear pump, and aims to solve the problem that the performance, the operation efficiency and the operation stability of the gear pump are reduced due to leakage jet flow caused by a relatively large tooth crest gap in the gear pump. A driving gear and a driven gear of the gear pump are mounted in a pump body, are in meshed connection and are used for driving fluid to flow in the pump body. And at least one of the driving gear and the driven gear is provided with a jet flow channel at the gear teeth. The jet flow channel is provided with a flow inlet and a jet flow opening which communicate with each other, and when the gear teeth rotate towards the high-pressure side, the flow inlet is formed in the high-pressure side of the gear teeth and used for enabling part of fluid to enter the jet flow channel from the flow inlet and be sprayed out from the jet flow opening so as to increase the drainage resistance of the tooth top gap. The spontaneous jet flow jetted through the jet flow channel and the leakage jet flow of the tooth crest gap form convection flow, so that the flowing speed of the leakage jet flow is reduced, the leakage flow resistance is increased, and the performance, the operation efficiency and the operation stability of the gear pump are improved.

A ratchet-type tensioning device comprises a base, wherein the base is provided with a accommodating area for accommodating a webbing, and the accommodating area is provided with a winding and winding and unwinding mechanism which is used for winding and unwinding the webbing; the winding and winding and unwinding mechanism comprises a ratchet wheel with gear teeth, and the accommodating area is further provided with an operating mechanism, and the winding and winding and unwinding mechanism can be selectively locked or unlocked by the operating mechanism.

The invention discloses a gear positioning device and method in a gear processing machine, and relates to the technical field of gear processing, the gear positioning device has the advantage of reducing the influence of a clamping plate on the processing of inner wall gear teeth or outer wall gear teeth of a gear, and the key point of the technical scheme is that the gear positioning device comprises a processing table, four moving columns and four supporting legs arranged at the bottom end of the processing table; the top ends of the four moving columns are all provided with circular clamping plates, the four moving columns are evenly distributed in the circumferential direction of the machining table and are opposite in pairs, and the machining table is provided with first driving pieces used for simultaneously driving the four moving columns to move in the direction close to or away from each other horizontally. And after the four moving columns make contact with the outer wall or the inner wall of the gear, a second driving piece used for driving the four moving columns to vertically move downwards at the same time is arranged on the machining table, four arc-shaped base plates are detachably connected to the top end of the machining table, and the four base plates are evenly distributed in the circumferential direction of the machining table.

The invention relates to an electric operating device for a manual valve. The electric operating device comprises a small diesel generating set used for providing a power source, a motor, a planetary gear transmission module, an adjustable fixing disc and a control device, wherein the small diesel generating set supplies power to the motor so as to provide operating power; an adjustable base is arranged at the bottom of the motor, an output shaft of the motor is connected with a sun gear of the planetary gear transmission module, a gear ring of the planetary gear transmission module is meshed with a first planet gear and fixed to the adjustable base, and a first planet carrier of the planetary gear transmission module is connected with an adjustable fixing disc. The adjustable fixing disc is detachably installed on a manual operation door wheel of the valve and used for operating a valve switch. The control device is used for starting and stopping the small diesel generator set and the motor, the problem of energy dependence can be solved, and the first-aid repair efficiency is greatly improved. And meanwhile, the problem that a motor is burnt or gear teeth are broken due to rusting and jamming of a field valve is solved.

The invention relates to the technical field of gear machining equipment, and particularly discloses a gear grinding machine for gear machining, which comprises a base, a controller, a bearing structure, a driving structure, a first gear grinding structure and a second gear grinding structure, the controller is fixedly arranged on the upper wall of the base and close to the front end, and the bearing structure is fixedly arranged on the upper wall of the base and located in the middle; the gear grinding device is suitable for machining gears with different shaft holes and different sizes through a replaceable shaft column, a to-be-ground gear is limited through a bearing structure, and a corresponding replaceable driving wheel is arranged on a driving structure and can be matched with the to-be-ground gear to select a grinding mode; the driving wheel drives the to-be-ground gear to rotate, the first gear grinding structure rotates slowly to adjust the gear teeth, the side walls of the gear teeth are ground in sequence, relative adjustment can be conducted according to different tooth numbers or the inclination angles of the side walls of the gear teeth, and meanwhile the distance can be adjusted according to the width of the gear teeth.

The invention discloses a high-precision compound machine tool for special-shaped surface machining, and belongs to the technical field of compound machine tools, the high-precision compound machine tool comprises a machine tool body, a spindle box and a machining seat are fixedly connected to the interior of the machine tool body, and a mounting seat is fixedly connected to the side, away from the machine tool body, of the spindle box. According to the device, a driving motor drives a rotating shaft, a first gear, a fluted disc, a plurality of second gears, a connecting shaft and a lead screw to rotate, a threaded sleeve drives a vertical plate, a connecting base, a connecting plate, a hydraulic cylinder and clamping bases to move, a to-be-machined workpiece is synchronously mounted and fixed through the multiple clamping bases, and the rapid mounting effect of a machine tool in the using process is effectively improved; when the to-be-machined workpiece is a special-shaped workpiece, the hydraulic cylinder drives the clamping bases to move, the center positions, relative to the fixing disc, of the multiple clamping bases are adjusted, and then the multiple clamping bases make contact with the surface of the to-be-machined workpiece of the special-shaped workpiece for installation in cooperation with the action of the driving motor. And therefore, the flexibility and the practicability of the machine tool in the using process are effectively improved.

The invention discloses tooth crest flatness detection equipment for a gear, and relates to the field of tooth crest flatness detection equipment, the tooth crest flatness detection equipment comprises a box body, the box body is internally provided with a detection mechanism, the detection mechanism comprises a supporting rod, a supporting table, a rack, a mounting plate and a bearing plate, and the outer surface of the middle part of the supporting rod is fixedly connected with a circular gear 1. According to the tooth crest flatness detection equipment for the gear, through cooperative arrangement of the detection mechanism and the cleaning mechanism, the situation that the detection workload of workers is large due to the fact that detection is conducted in a measuring mode through a measuring tool can be effectively avoided, the detection efficiency of the gear flatness can be effectively improved, and the detection efficiency of the gear is improved. The gear tooth crest detection device is simple in structure, convenient to use, capable of enabling workers to judge detection results more visually, capable of effectively guaranteeing the accuracy of the detection results, capable of cleaning dust or chippings attached to the gear tooth crest and capable of avoiding the situation that the detection results are affected by the dust or the chippings.

The invention discloses a design method of a complex shape modifying and finishing wheel and a honing wheel for internal meshing powerful gear honing, and relates to the technical field of machine manufacturing. The method comprises the following steps: establishing a trimming wheel tooth surface numerical model, and judging whether the modification amount of the trimming wheel tooth surface numerical model meets the modification requirement or not; if yes, establishing a space coordinate conversion relation and a conjugate meshing equation of the dressing wheel and the honing wheel, and establishing a honing wheel tooth surface numerical model in combination with the dressing wheel tooth surface numerical model; according to the space coordinate conversion relation between the workpiece gear and the honing wheel and the honing wheel tooth surface numerical model, a complex modification workpiece gear tooth surface numerical model is established, and whether the modification amount of the complex modification workpiece gear tooth surface numerical model meets the modification requirement or not is judged; and if yes, a dressing wheel three-dimensional solid model and a honing wheel three-dimensional solid model are established according to the dressing wheel tooth surface numerical model and the honing wheel tooth surface numerical model respectively. According to the method, precise design and verification of the complex shape modifying and finishing wheel and the honing wheel for powerful gear honing can be achieved.

The invention discloses a face gear planetary transmission system dynamic uniform load test platform and test method, and belongs to the field of gear transmission, and the test platform comprises a rack, a drive motor, a step-up gear box, a face gear planetary transmission system, a magnetic powder brake, a torque sensor, a slip ring, a stress strain test system and the like. The face gear planetary transmission system comprises an input face gear, a planet wheel, a planet carrier, a fixed face gear and the like. According to the dynamic uniform load test, stress values at the tooth root of the face gear and the tooth root of the planetary gear are measured mainly through strain gauges, and the corresponding relation between the tooth root stress and the meshing force at the gear meshing point is obtained through finite element simulation. And calculating the dynamic uniform load coefficient according to the dynamic meshing force root-mean-square values and the average values obtained at the tooth roots of the face gear and the planetary gear. By testing and analyzing the dynamic uniform load coefficient, the load distribution characteristic of the face gear planetary transmission system can be accurately revealed, a scientific basis is provided for structural parameter optimization, meshing performance improvement and reliability design of the face gear planetary transmission system, and then accurate and high-performance design of the transmission system is achieved.

The utility model discloses a silent synchronous pulley, which belongs to the technical field of mechanical transmission structures, and comprises a pulley main body, uniformly distributed gear teeth are arranged on the pulley main body, flange structures are arranged at two axial ends of the pulley main body, and a first bump is arranged on one side, facing the gear teeth, of each flange. According to the scheme, the flange structures are arranged at the two axial ends of the belt wheel body and used for directly abutting against the two side edges of the synchronous belt, the flanges are fixedly connected with the belt wheel body, the first protruding blocks face the middle position of the belt wheel body and make contact with the synchronous belt, and the protruding structures of the first protruding blocks enable the contact area of the first protruding blocks and the side edges of the synchronous belt to be reduced; in other words, the contact area of the synchronous belt and the flanges is reduced, so that when the synchronous belt and the belt wheel body rotate in a matched mode, the friction force between the synchronous belt and the flanges is reduced, and meanwhile the noise reduction effect is achieved; in addition, due to the fact that friction force is reduced, heat generated by the synchronous belt is reduced, and the service life of the synchronous belt is prolonged.

A motor assembly for rotating an underwater mounted device around a troll motor shaft. The motor assembly may have a hub fix part, a top ring, a gear ring having an inner surface covered with a plurality of gear teeth, a bottom ring, a motor mounting plate, a stepper motor attached to the motor mounting plate, a stepper motor shaft rotated by the stepper motor and a spur gear pinion attached to the stepper motor shaft. The hub fix part, top ring, gear ring, bottom ring and motor mounting plate are configured, when positioned on top of each other, to form an inner chamber in the motor assembly. The stepper motor may rotate the spur gear pinion inside the chamber. The spur gear pinion may engage with the plurality of gear teeth of the gear ring to thereby rotate the motor assembly about an axis of the troll motor shaft.

The invention provides a tool applied to the field of petroleum drilling, and particularly relates to an underground non-circular gear intelligent impact tool which comprises a power module, an axial impact module and a circumferential impact module, the power module enables drilling fluid to impact a turbine in a directional mode through a drainage disc, hydraulic energy is converted into mechanical energy, and the mechanical energy is transmitted to the axial impact module. The power is transmitted to the axial impact module and the circumferential impact module, the axial impact module lifts a rack punch hammer to compress a spring through meshing of an incomplete gear and the rack punch hammer, and when the incomplete gear is disengaged from the rack punch hammer, the spring releases energy to generate axial impact downwards. The circumferential impact module is composed of two groups of incomplete gears and racks which are arranged in an up-down 90-degree staggered mode, the rack punch hammer compresses a spring through meshing of the incomplete gears and the rack punch hammer, and the spring is released to generate circumferential impact when the incomplete gears and the rack punch hammer are disengaged. Periodic impact can be achieved, the mechanical rock breaking efficiency is effectively improved, and the stick-slip phenomenon at the drill bit is reduced.

The invention provides an abrasive flow polishing device and method for gear tooth surface homogenization. According to the method, tooth-shaped drainage pieces with the same shape as the gear are installed at the two ends of the upper portion and the lower portion of the gear, drainage section design is introduced, an abrasive flow medium path runner model is constructed, main parameters influencing an experiment are sampled and grouped through a Latin hypercube sampling method, abrasive flow polishing simulation is conducted in a grouped mode, and a Gaussian regression process is utilized to obtain an abrasive flow polishing simulation result. Selecting the minimum root-mean-square error of each group of PiVi data, determining the group of experimental parameters, obtaining a group of abrasive flow machining process parameters of optimal inlet pressure, back pressure and drainage section length, and finally guiding the experiment; according to the method, the influence of the inlet effect is relieved, the abrasive flow medium path runner model is constructed, a set of optimal abrasive flow machining process parameter combination is obtained, and the method is suitable for spur gears and bevel gears and high in universality.