3946 results about "Epicyclic gearing" patented technology

The invention relates to an integrated oil cooling hub speed reduction electric wheel which comprises a motor, a planetary gear speed reducer and a bearing system which are arranged in the axial direction, and the planetary gear speed reducer is arranged in the motor and integrated with a brake. The bearing system comprises a rotor supporting bearing used for supporting a motor rotating system and a hub bearing used for supporting a wheel rotating system, the motor, the planetary gear reducer and the rotor supporting bearing are designed in an integrated oil cooling mode, and cavities where the motor, the planetary gear reducer and the rotor supporting bearing are located are communicated with one another. Cooling liquid cools and lubricates the motor, the planetary gear reducer and the rotor supporting bearing at the same time. Compared with the prior art, the electric wheel is compact in structure, the number of sealing pieces of the electric wheel can be reduced on the premise that the electric wheel has good structural rigidity, the axial size of an electric wheel assembly is reduced, and the electric wheel has the advantages of being good in cooling effect and easy to maintain.

The invention discloses a motor-clutch time division multiplexing driving system for a rope-driven dexterous hand. The motor-clutch time division multiplexing driving system comprises a driving box, a plurality of rope-driven mechanisms and a plurality of dexterous fingers, wherein the rope-driven mechanisms and the dexterous fingers are arranged on the driving box; the rope driving mechanism comprises a power unit, a worm and gear unit and a guide unit. The power unit uses a sun gear to drive a plurality of planetary gears, and an electromagnetic clutch outputs power to the worm and gear unit; the plurality of worm and gear units are respectively used for controlling the winding and unwinding of the plurality of driving ropes; the plurality of guide units respectively guide the plurality of driving ropes to the same rope-driven rotating joints of the plurality of dexterous fingers; different rope-driven rotating joints of the dexterous fingers are controlled by different rope-driven mechanisms, and the same rope-driven rotating joint of the multiple dexterous fingers is controlled by the same rope-driven mechanism. According to the scheme, the fast switching characteristic of the electromagnetic clutch is ingeniously utilized, and driving control over multiple degrees of freedom by a single motor is achieved.

The invention discloses size detection equipment for casting perforation processing, and relates to the technical field of size measurement. The device comprises a base, a supporting plate and a displacement assembly. The detection part goes deep into a workpiece hole through the contact ball, and the laser emitter and the light sensor are used for detecting the contact position, thereby realizing high-precision size measurement. The displacement assembly adopts the design of a negative pressure rotating cylinder and a resistance sliding rod, adjusts the displacement of a contact ball according to the rotating speed, and flexibly adapts to different hole requirements. Through the control of the planetary gear and the electromagnet, the contact ball can rotate to realize multi-angle detection. The detection table is driven by a central electric cylinder and an edge inclination control electric cylinder to stably adjust the posture of a workpiece. The device is high in automation degree and convenient to operate, and overcomes the defects of low precision, poor efficiency and single-direction detection of traditional manual measurement.

The invention discloses a self-cleaning mechanism of a differential rotation type multi-stage air purification filter cartridge, and relates to the technical field of air purification equipment. The device comprises a purification shell, a first filter cartridge is arranged in the purification shell, the surface of the first filter cartridge is sleeved with a second filter cartridge, and the surface of the second filter cartridge is sleeved with a third filter cartridge; a driving assembly is arranged at the top of the purifying shell and comprises a driving motor arranged at the top of the purifying shell and a transmission rod installed at the output end of the driving motor. Through meshing transmission of a sun gear and a planetary gear in the driving assembly, differential rotation of the first filter cartridge and the second filter cartridge is achieved, attached particles are stripped in a layered mode through centrifugal force, the self-cleaning efficiency is remarkably improved, the differential design breaks through a static filtering mode of a traditional filter cartridge, particulate matter deposition inertia can be actively destroyed, and surface dust accumulation of a filter material is reduced; the problem of filtering efficiency attenuation caused by dust accumulation is avoided, the service life of the filter cartridge is prolonged, and the maintenance frequency is reduced.

The invention provides an automatic speed changing assembly which comprises a planetary gear speed reducing mechanism, a first-stage speed changing mechanism and a second-stage speed changing mechanism. An inner rotation driving member; the outer element is movably connected with the inner rotation driving part, so that the outer element can be driven to rotate under the driving of the inner rotation driving part, and the outer element is allowed to axially move between a first position and a second position relative to the inner rotation driving part; the driving disc is movably connected with the outer element, so that the driving disc can be driven to rotate under the driving of the outer element, and the driving disc is configured to be capable of changing between a first state in which the driving disc is combined with the power output element and a second state in which the driving disc is separated from the power output element; the first stage sun gear is configured to disengage from the outer element in a first position of the outer element and to engage with the outer element in a second position of the outer element. According to the automatic speed changing assembly and the electric capstan with the automatic speed changing assembly, the automatic speed changing function can be achieved, and reliability is good.

The invention discloses a planetary gear system digital twin model updating method based on deep reinforcement learning. The planetary gear system digital twin model updating method comprises the steps of S1, simplifying a planetary gear system; s2, describing the kinetic model by using a lumped parameter method, and constructing a planetary gear train oscillatory differential equation set; s3, a frequency response function family is calculated through finite element analysis, and a planetary gearbox rigid-flexible coupling model, namely a digital twinborn body, is constructed; s4, vibration response of the planetary gearbox shell under the stable rotating speed is obtained through a vibration signal collecting device; s5, defining an action space and a state space, and establishing a reinforcement learning environment; s6, solving the oscillatory differential equation set to obtain a simulation response, and constructing a reward function according to the simulation response; step S7, setting neural network parameters; step S8, optimizing by using a deep reinforcement learning algorithm; and step S9, loop iteration is carried out, the optimal physical parameters of inversion are output, and updating of the digital twinborn body is realized.

A blind cord spool structure has a cord spool. The cord spool includes a bottom case, force-receiving wheel, driven chainwheel, top case, two rotatable units, and two spool rollers. The bottom case is in long rectangular shape. The bottom case and the top case allow the force-receiving wheel, driven chainwheel, rotatable units and spool rollers to be fitted together. The force-receiving wheel meshes with the driven chainwheel through a plurality of planetary gears and interlocks with the spool rollers and rotatable units through a driven gear. The high speed reduction ratio of the planetary gears effectively reduces the required weight of a volute spiral spring and reduces the operation cost of the volute spiral spring. With the bottom case being in long rectangular shape, the force-receiving wheel, rotatable units and spool rollers can be collectively mounted on the same standard surface, allowing the cord spool to be structurally simple.

The invention discloses a humanoid robot and a shank structure thereof. The shank structure comprises a knee frame, a foot plate, a driving assembly and a cam; the foot plate is rotatably connected to the knee frame around the X axis; the knee frame is provided with a rotating seat; the inner shaft is rotationally connected to the rotating seat around the Y axis; the fixing sleeve is rotatably mounted on the inner shaft; the driven planetary gears are meshed with the driving planetary gears on the two sides; one end of the side shaft is limited to the fixing sleeve, and the driven planetary gear is rotationally arranged on the side shaft in a sleeving mode. The upper end of the connecting rod is rotatably connected to the connecting seat, and the lower end of the connecting rod is rotatably connected to the foot plate; when the cams at the left and right positions rotate towards the same direction, the connecting seat drives the foot plate and the knee frame to rotate around the Y axis through the connecting rod; when the cams at the left and right positions rotate in opposite directions, the connecting seat rotates around the side shaft and drives the foot plate to rotate around the X axis relative to the knee frame through the connecting rod. According to the scheme, more flexible gait control can be achieved, and the problem that the weight burden of shanks is too heavy due to a direct drive mode in a traditional system is solved.

In one aspect, an in-wheel drive assembly is provided that includes a stator configured to form a non-rotatable connection with a spindle of a vehicle and be positioned outboard of the spindle. The in-wheel drive assembly includes a stator retainer configured to extend in an interior of the spindle and inhibit movement of the stator in an outboard direction relative to the spindle. The in-wheel drive assembly further includes a rotor rotatably supported by the stator, an output housing to be connected to a wheel hub, and a planetary gear assembly operatively connecting the rotor and the output housing. The planetary gear assembly is configured to cause rotation of the output housing and wheel hub connected thereto in response to rotation of the rotor.

The invention provides a compound uniform-load and shunt load shedding type planetary gear gearbox with a face gear. The compound uniform-load and shunt load shedding type planetary gear gearbox comprises an input planet carrier integrated assembly, a first-stage compound uniform-load planet row, an inter-stage flexible connection structure, a second-stage planet row and a face gear steering output assembly. The input planet carrier integrated assembly is connected with the first-stage compound uniform-load planet row, the inter-stage flexible connection structure is arranged between the first-stage compound uniform-load planet row and the second-stage planet row, and a first-stage floating sun gear in the first-stage compound uniform-load planet row and the main shaft planet carrier structure are coaxially arranged. The first-stage floating sun gear is installed in a floatable mode through a first-stage sun gear supporting shaft, self-adjustment can be achieved in the radial direction and the axial direction, and the first-stage floating sun gear is meshed with the first planet gear and the second planet gear in a double-side mode. The energy conversion efficiency can be improved, uneven load distribution is improved, and the system integration degree is improved.

The invention provides an electric drive axle assembly and a vehicle with the same, and relates to the technical field of vehicles. The electric drive axle assembly comprises a drive motor; the differential mechanism is connected with a vehicle wheel end through a half shaft; the first planetary gear train at least comprises a first sun gear and a first planetary gear, the first sun gear is connected with an output shaft of the driving motor, and the first planetary gear is arranged on a first planetary carrier; the second planetary gear train at least comprises a second sun gear and a second planetary gear, the second planetary gear is arranged on a second planetary carrier, and the output end of the second planetary carrier is connected with the differential mechanism; and the transmission gear system is connected with the first planetary gear system and the second planetary gear system, and the transmission gear system is used for transmitting power of any one of the first planet carrier and the first sun gear to any one of the second planet carrier and the second sun gear. The problems that an electric drive axle of a commercial vehicle is large in size and unreasonable in gear-speed ratio setting are solved.

The invention relates to a differential performance detection device, which belongs to the technical field of differential detection, and comprises a detection terminal connected with the axial end face of a planetary gear; the detector is arranged opposite to the detection terminal; a displacement sensor is arranged on the surface, facing the detection terminal, of the detector; the detector is provided with the surface of the displacement sensor to abut against the detection terminal, and the axial pressure of abutting between the detector and the detection terminal is zero. The driving part is used for driving the bevel gear to rotate; the processor is connected with the displacement sensor; the moment when the driving part drives the bevel gear to rotate is the first moment, the bevel gear transmits power to the planetary gear through rotating meshing after rotating, the displacement sensor is used for detecting whether the planetary gear rotates or not, the moment when the displacement sensor feeds back signals is the second moment, and the meshing clearance is detected according to the first moment and the second moment. Whether the tooth pitch of the differential mechanism is out of tolerance or not can be judged, and the accurate positioning effect of differential mechanism fault detection is achieved.

The invention relates to the technical field of chemical equipment, in particular to an internal circulation esterification kettle which comprises a kettle body, a circulation stirring assembly, a driving assembly and a scraping assembly. A reaction cavity is formed in the kettle body; the circulating stirring assembly comprises a separation cylinder, a rotating shaft, a first paddle and a driving part; a circulation cavity is formed between the outer wall of the separation cylinder and the inner wall of the kettle body; the first paddle is arranged on the rotating shaft; the driving part is used for driving the rotating shaft to rotate; when the rotating shaft rotates, the first paddle can push materials from the first end of the separation barrel to the second end of the separation barrel, and then the materials flow back to the first end through the circulation cavity; the driving assembly comprises a first gear, a gear ring, a mounting frame and a second gear which form a planetary gear train; the scraping assembly comprises a reciprocating lead screw, a guide rod and a scraping plate, and when the rotating shaft rotates, the scraping plate can rotate by taking the central axis of the rotating shaft as the center and slide up and down along the inner wall of the kettle body in a reciprocating manner. The reaction kettle has the effects of improving the material mixing efficiency and uniformity and reducing adhesion between materials and the inner wall of the reaction kettle.

The invention belongs to the technical field of speed reducers, and particularly relates to a multi-point meshing compound planetary gear speed reducer, a driving wheel set and a robot driving module. Wherein the multi-point meshing compound planetary gear reducer is provided with a sun gear serving as power input; the duplex planet gears are uniformly distributed around the sun gear, the duplex planet gears are composed of first planet gears and second planet gears, and the sun gear is meshed with the first planet gears; an intermediate planet gear exists between any two adjacent second planet gears in the circumferential direction, and each intermediate planet gear is meshed with the two adjacent second planet gears at the same time; an inner gear ring is arranged on a machine shell of the speed reducer, and the inner gear ring is meshed with the intermediate planet wheel. An existing planetary reducer has defects in the torque transmission capacity and the bearing capacity, a combined structure of a duplex planet wheel and an intermediate planet wheel is adopted, the intermediate planet wheel forms a multi-point meshing relation in the transmission process, loads are evenly dispersed, and the torque transmission capacity and the bearing capacity of the reducer are improved.

Apparatus and methods relate to a gear reducer, which may be used downhole to reduce rotational speed output from a downhole motor, such as a turbine motor, to a slower speed desired for rotation of a drill bit. The gear reducer includes a planetary gear arrangement coupled to receive rotational input from the downhole motor and a cycloidal gear arrangement driven by rotation resulting from the planetary gear arrangement. An output shaft couples to the cycloidal gear arrangement and rotates during operation slower than the rotational input from the downhole motor.

The invention relates to the technical field of internal spline machining, in particular to an internal spline high-precision machining method and device suitable for a planetary gear, and the method comprises the steps that periodicity measurement and a trend line function are obtained; obtaining a cutting force fluctuation coefficient and a cutting influence coefficient of each time of internal spline machining; and on the basis of the cutting influence coefficient, obtaining the particle weight of each particle in the particle swarm optimization algorithm and the updated inertia weight of each iteration, and performing high-precision machining on the internal spline of the planetary gear. The machining precision of the internal spline of the planetary gear is improved.

Provided is a herringbone planetary gear transmission device with a constant meshing characteristics constructed tooth pair, which relates to the technical field of gear transmission. The transmission device includes a sun gear with a constructed tooth pair, a planetary gear with a constructed tooth pair and an internal gear with a constructed tooth pair based on conjugate curves. Normal tooth profiles of the gears with a constructed tooth pair in the present disclosure are all the same combined curve and can be machined by using the same cutter. A common normal at an inflection point or a tangent point of the curve passes through a pitch point of a meshing gear pair, and a sliding ratio of the meshing gear pair is adjusted according to an adjusted position of the inflection point or the tangent point. A contact ratio of the meshing gear pair is designed as an integer.

The invention relates to the technical field of planetary gear machining equipment, and discloses a planetary gear machining device with a bidirectional feeding mechanism, which mainly comprises a planetary gear machining machine tool machining table for bearing machining operation, and a conveying mechanism for conveying planetary gear blanks, the bidirectional feeding mechanism is used for realizing bidirectional precise feeding; the conveying mechanism is arranged between machining tables of the planetary gear machining machine tool and used for achieving long-distance conveying of blanks. Two-way operation of blank feeding and finished product discharging can be achieved through the feeding robot of the two-way feeding mechanism, manual intervention is not needed, the blanks on the conveying belt are accurately transferred to the machining table, the finished products are transferred to the designated position after machining is completed, and automation of the whole process is achieved; the mechanical arm of the feeding robot is flexible and controllable and can be matched with the rotating shaft to meet the grabbing and transferring requirements of different angles, the feeding path is accurate, the feeding time is greatly shortened, and the batch production efficiency is improved.

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 discloses a power generation and driving integrated device with an active lubricating system. The power generation and driving integrated device comprises a motor shell, a motor, a planetary gear mechanism, a transmission gear set, a filter, an electronic pump, a flywheel shell and a motor shell cover plate. The motor shell comprises a motor cavity for accommodating the motor and a gear cavity for accommodating the planetary gear mechanism and the transmission gear set, the flywheel shell seals the gear cavity, and the motor shell cover plate seals the motor cavity; the bottom of the gear cavity is divided into an oil suction cavity through a motor shell oil separation rib, an oil return groove is formed in the connecting position of the motor shell oil separation rib and the bottom of the gear cavity, the filter is contained in the oil suction cavity, the electronic pump partially stretches into the oil suction cavity and is connected with the filter, and an oil outlet of the filter is communicated with an oil inlet of the electronic pump. According to the invention, stable active lubrication of parts with lubrication and cooling requirements, such as shafts, gears, bearings, motors and the like, is realized. Meanwhile, gear oil stirring can be reduced, and the speed reducer efficiency is improved.

The invention relates to the field of gear machining equipment, and discloses inner hole grinding equipment for wind turbine generator gearbox planetary gear manufacturing, which comprises a shell and a grinding rod mounted in the shell, a mounting assembly is arranged at the upper end of the interior of the shell, and a clamping assembly is arranged at the upper end of the mounting assembly. The inner hole grinding equipment comprises a shell, a clamping assembly is arranged on one side of the shell, a detection assembly is arranged on one side of the clamping assembly, and the mounting assembly can be used for mounting the clamping assembly and the detection assembly and also can be used for adjusting the position of the clamping assembly and the detection assembly in the shell. According to the gear grinding device, the flatness of the end face of each gear can be detected, whether a pit, a protrusion and deformation exist in a grinding rod and whether a rotating shaft is horizontal or not are detected before each time of machining, therefore, the perpendicularity of the end face and an inner hole can be guaranteed, the situation of excessive grinding or not in place grinding is prevented, the use amount of cooling liquid can be reduced, and the installation space can be saved.

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 invention relates to the technical field of cutting machining, in particular to a planetary gear carrier cutting machining device and method capable of reducing machining errors, and the method comprises the steps that after rough turning machining is conducted on a planetary gear carrier in an RV speed reducer, the influence of the self-balance phenomenon of residual stress on stress relief is analyzed, and the machining error is reduced; establishing an influence relational expression of residual stress elimination; determining a dynamic switching strategy in the butterfly optimization algorithm based on the distribution of the feature points in the correlation curve of the three parameters; and determining optimal variables in different stages by using a butterfly optimization algorithm in combination with an influence relational expression of the internal stress self-balancing phenomenon of the planetary gear carrier structural member under the parameters on stress distribution, and performing subsequent processing on the obtained planetary gear carrier structural member to obtain the planetary gear carrier. The method aims to eliminate the residual stress of the planetary gear carrier subjected to rough turning, and the cutting machining error is reduced.

A digital power take-off system includes an input shaft and an output shaft connected to a planetary gear. An actuator is mechanically coupled to the planetary gear to mechanically control a rotational speed of the output shaft. An output shaft sensor detects the output shaft rotational speed. Controller circuitry receives a desired output shaft rotational speed, receives the output shaft rotational speed from the output shaft sensor, and determines a difference between the rotational speeds. The controller circuitry outputs an operating parameter, based on the determined difference, to the actuator such that the actuator modifies a gear ratio of the planetary gear to maintain the desired output shaft rotational speed over a range of input shaft rotational speeds.

An electric propulsion system for a vertical take-off and landing (VTOL) aircraft having a heat exchanger to cool fluids used in an electrical engine, the electric propulsion system comprising at least one electrical engine mechanically connected directly or indirectly to a fuselage of the VTOL aircraft and electrically connected to an electrical power source. The electrical engine may comprise an electrical motor having a stator and a rotor; a gearbox assembly comprising a sun gear; at least one planetary gear; a ring gear; and a planetary carrier. The electric engine may include an inverter assembly comprising a thermal plate and an inverter assembly housing; an end bell assembly that is connected to the thermal plate of the inverter assembly; and a heat exchanger comprising an array of cooling fins and tubes.

The invention discloses a planet row lubricating structure and a vehicle. The planet row lubricating structure comprises a reduction gearbox, a planet row and an oil collecting tray. The reduction gearbox is provided with a reducer mounting cavity and an oil storage cavity which are communicated. The planet row is positioned in the speed reducer mounting cavity; a first bearing is arranged between the planet row and the reduction gearbox; a planet wheel shaft of the planet row is provided with an oil guide cavity and an oil guide hole which are communicated; a planetary gear of the planetary row is installed on the planetary gear shaft through a second bearing, and the second bearing corresponds to the oil guide hole in position. The oil collecting disc is connected with a planet carrier of the planet row and provided with oil outlet nozzles with the same number as the planet wheel shafts, and the oil outlet nozzles extend into the corresponding oil guide cavities so as to communicate the oil guide cavities with oil collecting cavities of the oil collecting disc. A plurality of oil channels are formed in the box wall of the reduction gearbox, and the installation space of the first bearing and the oil collecting cavity of the oil collecting disc are communicated with the corresponding oil channels respectively. The planet row is actively sprayed with oil for lubrication through the oil collecting disc, and the cooling effect is good. No oil pipe needs to be arranged outside the reduction gearbox, and the reduction gearbox is more compact in structure.