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574 results about "Astrophysics" patented technology
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Astrophysics is the branch of astronomy that employs the principles of physics and chemistry "to ascertain the nature of the astronomical objects, rather than their positions or motions in space". Among the objects studied are the Sun, other stars, galaxies, extrasolar planets, the interstellar medium and the cosmic microwave background. Emissions from these objects are examined across all parts of the electromagnetic spectrum, and the properties examined include luminosity, density, temperature, and chemical composition. Because astrophysics is a very broad subject, astrophysicists apply concepts and methods from many disciplines of physics, including classical mechanics, electromagnetism, statistical mechanics, thermodynamics, quantum mechanics, relativity, nuclear and particle physics, and atomic and molecular physics.
A sun-synchronous orbit design method for remote sensing satellite based on revisit characteristics
ActiveCN113849963BDesign optimisation/simulationSpecial data processing applicationsSynchronous orbitMathematical model
A method of sun-synchronous orbit design for remote sensing satellite based on revisit characteristics is proposed. The relationship between revisit and ground synchronization is established by Q value. The mathematical model of Q is established by node revisit sequence in a certain interval. Then the coverage rate is obtained by the mixed node access sequence and coverage area of orbit altitude and observation angle. Finally, the coverage rate of remote sensing satellite in sun-synchronous orbit is demonstrated from three aspects of time-varying coverage rate, minimum coverage time and minimum observation angle, which provides a reference for the design of sun-synchronous orbit of remote sensing satellite.
Owner:BEIHANG UNIV
Low-orbit satellite antenna board card
PendingCN121602025AAntenna supports/mountingsRadiating elements structural formsSatellite antennasCircularly polarized antenna
The invention relates to the technical field of antennas, in particular to a low-orbit satellite antenna board card. Comprising a first radiation unit, a second radiation unit and a PCB. The first radiation unit and the second radiation unit are circularly polarized antennas and respectively work in different frequency bands. The first radiation unit is of a cross-shaped structure, the second radiation unit is of a hollow structure, and the first radiation unit and the second radiation unit are both made of metal materials. The first radiation unit and the second radiation unit are nested on the PCB, the upper surface of the PCB is provided with a thermal control material, the lower surface of the PCB is provided with a heat conduction material, the antenna board card provided by the invention is suitable for being used outside a cabin, the application of the PCB to the outside of the cabin becomes possible, and thus light weight and low cost of a low-orbit satellite antenna are realized.
Owner:WUHAN HONGXIN TELECOMM TECH CO LTD
- electromotive assembly with an electric machine, a differential mechanism and rotary mounting of floating shafts
PCT designated stageWO2026073884A1Couplings for rigid shaftsDifferential gearingsElectric machineDrive shaft
Electromotive assembly comprising a casing (CM), a differential mechanism (DF) and an electric machine (MEL) having a rotor (9) with a rotor shaft (1), the differential mechanism (DF) comprising a planet carrier element (2) rotated by the rotor shaft, pinion gears (23, 24) rotatably mounted on the planet carrier, a first sun gear (21) and a second sun gear (22), a short drive shaft (A1), bearing splines and mounted on the one hand in the first sun gear, and on the other hand in a first primary pinion, a long drive shaft (A2), bearing splines and mounted on the one hand in the second sun gear, and on the other hand in the second primary pinion, wherein the mounting of the rotating parts calls for two bearings (B1, B2) for rotatably mounting the rotor shaft, a bearing (B3) for rotatably mounting the first primary pinion, and a bearing (B4) for rotatably mounting the second primary pinion.
Owner:AMPERE SAS
Wind turbine gearbox planet carrier shaft hole coaxial degree correction device
The utility model provides wind power gear box planet carrier axle hole coaxial degree correction device relates to wind power gear box planet carrier axle hole correction technical field, including device seat, the top middle position fixed mounting of device seat has chuck clamp, the top middle position clamping of chuck clamp has planet carrier body, the periphery of planet carrier body is equipped with three mounting holes, and the top rear position of device seat is connected with the rear end position fixed connection of support frame bottom. Through comparing the detection data of different mounting holes, ensure the coaxial degree and position accuracy consistency between multiple axle holes, satisfy the high accuracy requirement of wind power gear box to planet carrier axle hole, and then guarantee the transmission efficiency, operation stability and service life of gear box. The current wind power gear box planet carrier axle hole coaxial degree correction lacks intuitive scale display and quantitative adjusting mechanism, cannot monitor deviation data in real time in the correction process, leads to the problem that the correction effect is unstable, and the rework rate is higher.
Owner:WUXI DINGYI HEAVY IND MFG CO LTD
Method and system for constructing low-thrust transfer orbit family between earth-moon translation point orbits
PendingCN121822867ACosmonautic vehiclesSpacecraft guiding apparatusHomotopy methodClassical mechanics
The invention discloses a construction method and system for a low-thrust transfer orbit family between earth-moon translation point orbits, and belongs to the technical field of aerospace. The method comprises the following steps: firstly, solving a time optimal transfer orbit based on a continuous low-thrust spacecraft motion equation; then taking the orbit as a seed, performing forward and reverse phase continuation along a departure orbit and an arrival orbit by adopting a self-adaptive step length numerical continuation method, and generating a time optimal transfer orbit family covering different phases; secondly, mapping the time optimal orbit family into an energy optimal orbit family based on control law consistency, and expanding the transfer time range of the energy optimal orbit family through time continuation; and finally, gradually reducing homotopy parameters by using a homotopy method, detecting and processing thrust switching discontinuity in combination with a switching function, and converting the energy optimal orbit family into a fuel optimal transfer orbit family. According to the method, a continuous and complete orbit family is efficiently generated from a single solution, and systematicness and engineering applicability of orbit design are improved.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
A slewing power unit and robot
The application discloses a slewing power unit and a robot. The slewing power unit comprises a primary planetary gear and a secondary planetary gear. The primary planetary gear comprises a primary sun gear, a primary planet gear, a primary planet carrier and a primary inner ring gear. The primary sun gear is rotationally installed on the primary inner ring gear. The primary planet gear is engaged between the primary sun gear and the primary inner ring gear. The primary inner ring gear is fixedly installed on a first shell. The secondary planetary gear comprises a secondary sun gear, a secondary planet gear, a secondary planet carrier and a secondary inner ring gear. The secondary sun gear is rotationally installed on the secondary planet carrier. The primary planet carrier is fixedly installed on the secondary sun gear, so that the primary planet carrier synchronously rotates with the secondary sun gear. The secondary planet gear is engaged between the secondary sun gear and the secondary inner ring gear. The secondary inner ring gear is fixedly installed on a second shell. The first shell and the second shell are fixed. The first shell is integrally formed with the primary inner ring gear. The second shell is integrally formed with the secondary inner ring gear.
Owner:SHENZHEN ZHONGQING ROBOT TECH CO LTD
Planetary reducer
The utility model provides a planetary reducer which comprises a planet gear, a sun gear and a gear ring, the planet gear is meshed with the sun gear, the planet gear is meshed with the gear ring, the sun gear is connected with the output end of a motor, and the sun gear can drive the planet gear to rotate when rotating; the planet wheel is arranged on the sun wheel, the planet bearing is arranged on the planet wheel, one end of the output shaft is connected with the planet wheel through the planet bearing, the axis of the output shaft and the axis of the sun wheel are located on the same straight line, and the planet wheel can drive the output shaft to rotate when moving. The speed reducer solves the problems that a common speed reducer cannot bear large axial force in the working process and is poor in impact resistance, and torque output is unstable due to the fact that the radial circle of the output shaft end jumps too large due to a cantilever beam supporting structure.
Owner:THE 21TH RES INST OF CHINA ELECTRONIC TECH GRP CORP
Impact power tool
An impact power tool includes one or more of the following features including a housing, a motor, an output spindle, a rotary impact assembly, and a planetary transmission having a fixed ring gear and rotatable planet gear carrier. In an aspect, the planetary transmission is configured to transmit rotational motion from a motor output shaft to a cam shaft at a single overall speed reduction ratio. The planetary transmission includes a sun gear rotatably driven by the motor output shaft, a planet carrier rotatably driving the cam shaft, a ring gear rotationally fixed relative to the tool housing, a first planet gear mounted to the planet carrier and meshed with the sun gear but not meshed with the ring gear and a second planet gear mounted to the carrier and meshed with the ring gear but not meshed with the sun gear.
Owner:BLACK & DECKER CORP
Control method of panel satellite large-size flexible solar wing driving device, storage medium and computer equipment
ActiveCN121469899ACosmonautic power supply systemsPhotovoltaicsElectrical batteryMechanical engineering
The invention provides a control method of a panel satellite large-size flexible solar wing driving device. The driving device comprises a satellite body, a double-shaft SADA, a swing rod, a hinge, a pressing and releasing mechanism and an ROSA solar wing. The control method comprises the steps that a release signal is sent to the pressing and releasing mechanism, the pressing and releasing mechanism releases the pressed solar wing after receiving the release signal, and the solar wing is driven by a hinge at one end of a swing rod to be passively unfolded by a first angle; according to the target angle and the first angle, calculating a second angle that the double-shaft SADA needs to rotate; a rotation signal is sent to the double-shaft SADA, the double-shaft SADA drives the solar wing to continue to rotate by a second angle after receiving the rotation signal, and a rotation in-place signal is sent out; and an unfolding signal is sent to the solar wing, and the solar wing starts to unfold the cell array plane until the cell array plane is completely unfolded. The control method improves the energy utilization efficiency of the whole satellite platform.
Owner:BEIJING BLUE TOWER OPTICAL TRANSMISSION INTELLIGENT TECHNOLOGY CO LTD
Brake planet carrier
The utility model discloses a brake planet carrier, which relates to the technical field of brake planet carriers and comprises a bottom frame and a top frame. Fixing columns are evenly fixed to the top face of the bottom frame around the circle center, mounting grooves are formed in the surfaces of the fixing columns, mounting blocks corresponding to the fixing columns in position are evenly arranged on the bottom face of the top frame, the mounting blocks are correspondingly connected with the mounting grooves in an inserted mode, shaft holes are evenly formed in the surface of the top frame around the circle center, and shaft grooves are evenly formed in the top face of the bottom frame. A fixing unit is arranged in the fixing column; the brake planet carrier further comprises a planet wheel shaft and a planet wheel assembly, the bottom end of the planet wheel shaft and the shaft groove are correspondingly installed, and according to the brake planet carrier, the insertion blocks are inserted into the insertion holes through spring contraction to install the planet carrier, so that the problems that according to traditional bolt fixing, corrosion, thread slipping and damage are prone to occurring are solved; and meanwhile, dust and foreign matters on the surface of the planet wheel can be cleaned through the arranged cleaning brush, so that the dust and foreign matters are prevented from entering the planet wheel to influence subsequent use.
Owner:HANGZHOU FUYANG FORK TRUCK BRAKE
Deceleration device comprising housing provided with oil-conducting relief structure and aviation propulsion assembly comprising such device
The invention relates to a reduction gear (10) for an aviation propulsion assembly, comprising a ring gear (10A), a sun gear (10B) and at least one planetary gear (10C); an oil supply circuit (30) for at least one element of the sun gear (10B), the ring gear (10A), the at least one planet gear (10C) and the planet carrier (10D); and an annular housing (12) housing the ring gear (10A), the sun gear (10B), the at least one planetary gear (10C) and the planet carrier (10D), the annular housing (12) having a radially facing inner surface (12A) and an oil trap (13) configured to drain oil by gravity, the radially inner surface (12A) comprising a plurality of relief structures (14) distributed in a circumferential direction (C).
Owner:SAFRAN AIRCRAFT ENGINES SAS +1
A mounting device for a planet carrier circlip
The present application belongs to the technical field of planetary reducer assembly, and particularly relates to a mounting device for planet carrier clamping spring. A vertical first cylinder is mounted on a bottom frame; a piston rod of the first cylinder is connected with a first frame plate; a vertical second cylinder is mounted on the first frame plate; a clamping spring guide block is mounted on a top of a piston rod of the second cylinder; the clamping spring guide block is overall conical, a first mounting hole is formed in the middle of the clamping spring guide block, a first step in the form of a ring is formed by recessing an outer edge of a top of the clamping spring guide block; a clamping spring positioning plate is protruded from a side surface of the clamping spring guide block; a first fixed plate is mounted on a portal frame, two first sliding rails are mounted on the first fixed plate, a first sliding block is mounted on the first sliding rail, a second fixed plate is mounted on the first sliding block, a first angle iron is fixed on a surface of the second fixed plate, a third fixed plate is fixed on a bottom surface of the first angle iron, and a first supporting column is fixed on a bottom surface of the third fixed plate; the first supporting column is used for pressing a planetary reducer.
Owner:NATIEFU TRANSMISSION SYST (PINGHU) CO LTD
Epicyclic traction transmission with truncated conical rolling elements
An actuator comprises a sun wheel roller (104), a planet wheel roller (102), an auxiliary roller (103) and a fixed gear ring (101), the sun wheel roller (104) is located in the center, and the fixed gear ring (101) is located outside all elements. The auxiliary roller (103) is positioned between the planet wheel roller (102) and the fixed gear ring (101), and the planet wheel roller (102) is in contact with the sun wheel roller (104), the auxiliary roller (103) and the fixed gear ring (101), characterized in that the sun wheel roller (104), the planet wheel roller (102), the auxiliary roller (103) and the fixed gear ring (101) all have a truncated cone geometry or a truncated cone geometry. According to the invention, a transmission device is realized, which provides a simple method for changing the pre-tightening force on the rolling contact element, thereby providing an effective means for improving the torque density and the mechanical efficiency of the transmission device.
Owner:ARCHIMIA GROUP CO LTD
Drive device for electric bicycle and assembly for drive device for electric bicycle
The invention relates to a driving device for an electric bicycle and an assembly for a driving device for an electric bicycle. In at least one embodiment, the drive device (100) comprises a planetary gearbox (2) having a planet carrier (20) which is mounted rotatably about an axis of rotation (A) by means of a radial bearing (4) and an axial bearing (5).
Owner:PORSCHE EBIKE PERFOMANCE GMBH
Assembly of counter-rotating turbomachinery for aircraft
Each turbomachine (1, 100) comprises an output shaft (3, 103), an input shaft (5, 105), and a reduction gear, one (104) of which is an epicyclic gear and the other (4) a planetary gear. Each reduction gear has a sun gear (15, 115), a ring gear (13, 113), a planet carrier (16, 116), bearings (22, 122) mounted on said planet carrier, and two-stage planets (14, 114) rotatably mounted on said bearings, with their first stage (18, 118) meshing with the sun gear and their second stage (19, 119) meshing with the ring gear. The planet carriers (16, 116) are identical. (See Figure 2 for abbreviations.)
Owner:SAFRAN TRANSMISSION SYST
Planetary gear coaxial speed reducer
The utility model discloses a planetary gear coaxial type speed reducer which comprises a shell and a planet carrier differential mechanism assembly. A cavity is formed in the shell, and the planet carrier differential assembly is arranged in the cavity. The planet carrier differential mechanism assembly comprises a planet carrier differential shell, a planet gear train and a differential mechanism, the planet carrier differential shell is rotationally supported on the inner wall of the shell, the planet gear train and the differential mechanism are integrally arranged in the planet carrier differential shell, and after external power is input into the planet gear train, the planet carrier differential shell is driven to rotate; the differential mechanism outputs power to achieve the wheel end rotating speed difference, and the input axis of the planetary gear train, the rotating axis of the planet carrier differential shell and the output axis of the differential mechanism are coaxially arranged. The integrated coaxial design is adopted in the speed reducer, so that the speed reducer is smaller in overall size, carrying arrangement on a whole vehicle is facilitated, the weight is lighter, the efficiency is higher, and lubrication is sufficient during working.
Owner:MIANYANG FULIN PRECISION MACHINING
Modular high-precision gear box configuration
Owner:AB SKF SKF PATENT DEPARTMENT
Drive, transport vehicle, and use
A drive for a wheel-driven vehicle, includes a planetary gear system which includes a sun gear, a ring gear, a planet carrier, and planet gears carried by the planet carrier and meshing with the sun gear and the ring gear. The drive includes an electric motor for driving the sun gear and a wheel which is non-rotatably connected to the ring gear. The drive further includes an electromechanical brake for braking the sun gear and / or a drive shaft of the electric motor. The sun gear is arranged between the brake and the electric motor and / or the brake is being accommodated by an axial cut-out of the planetary gear system.
Owner:STXI MOTION LTD
Solar wing quick-mounting method suitable for flexible hinge connection of micro-satellite and solar wing
ActiveCN115924130BCosmonautic power supply systemsPhotovoltaic energy generationSatelliteAstrophysics
The application provides a solar wing quick mounting method and a solar wing suitable for flexible hinge connection of a micro-satellite, and the solar wing quick mounting method comprises the following steps: step 1, the hinge is pre-formed to the required angle through a hinge forming tool, and a hinge positioning tool is installed on the formed hinge joint through fasteners; step 2, the plate sleeve of the solar wing base plate is respectively installed on the upper and lower surfaces of the through hole of the locking device of the inner solar wing base plate, the middle solar wing base plate and the outer solar wing base plate, and the fastener of the locking plate sleeve is measured after being positioned through a pin; step 3, the outer solar wing base plate and the middle solar wing base plate are installed above the solar wing simulation wall through a positioning pin and a limiting column, and then the inner solar wing base plate with the SADA connecting frame installed in advance is installed above the middle solar wing base plate through the positioning pin. The beneficial effects of the application are that the flexible hinge is pre-formed, the hinge embedded part of the solar wing base plate is installed, and the line marking positioning ensures the installation position precision of the hinge.
Owner:AEROSPACE DONGFANGHONG DEV LTD
Transmission
A transmission (100) is provided with a cylindrical rotary housing (15) that accommodates a planetary gear mechanism (40) and that rotates by transmitting output rotation that has been shifted, the planetary gear mechanism (40) being provided with: a plurality of annular second planetary gears (53) that mesh with both a second sun gear (51) and an internal gear (42); and a plurality of second planet carriers (54) supporting the second planet gears (53), the second planet carriers (54) being provided with a plurality of second plates (80) covering at least a part of the second planet gears (53), fixed to the second planet carriers (54), for preventing the second planet gears (53) from falling off from the second planet carriers (54), the second plates (80) being configured so as to cover at least a part of the second planet gears (53), and the second plates (80) being configured so as to cover at least a part of the second planet gears (53) and fixed to the second planet carriers (54). Each of the first and second planetary gear carriers (54) is fixed so as to straddle the two or more second planetary gear carriers (54).
Owner:KYB CORP
Powertrain mounting for planetary transmission
A powertrain for a wind power installation includes a main bearing unit with a main shaft, and a planetary transmission driven by the main shaft and including a transmission housing and a planetary stage which revolves about a rotation axis in the transmission housing. The planetary stage includes a planet carrier, a ring gear, and a sun gear, with the planet carrier or the ring gear being drivingly connected, at least indirectly, to the rotor. The planet carrier includes planet gears which revolve conjointly with the planet carrier and alternately mesh with the ring gear and the sun gear. At least three guide elements disposed circumferentially about the rotation axis are each operatively connected alternately to the transmission housing and a circumferential region of the planet carrier. Each guide element is constructed of multiple parts and includes guide jaws disposed on axial sides of the planet carrier, respectively.
Owner:FLENDER GMBH
Flying saucer lamp
1. The name of the design product: flying saucer lamp. 2. The use of the design product: for lighting tools. 3. The design points of the design product: in shape, pattern. 4. The picture or photo that best indicates the design points: perspective view.
Owner:胡祥
A solar power generation device
ActiveCN224343124Ulower center of gravityreduce wind resistancePhotovoltaic supportsSolar heating energyGravity centerSolar power
The application provides a solar power generation device, which comprises a control box, a horizontal rotating mechanism located at the top of the control box, a pitching rotating mechanism located at the top of the horizontal rotating mechanism and a solar panel, wherein the solar panel is rotationally connected with the pitching rotating mechanism through a pitching connecting piece; the horizontal rotating mechanism is provided with a first limiting mechanism; and the pitching rotating mechanism is provided with a second limiting mechanism. Through the horizontal rotation and the pitching rotation, the solar panel can be kept at a high-efficiency power generation angle with the sunlight, and when encountering strong wind, the solar panel can be adjusted to a horizontal state to reduce the wind resistance; at night, the solar panel can be adjusted to a vertical state to make the dew, rain and snow fall; the setting of the pitching connecting piece lowers the gravity center of the solar panel and concentrates the gravity center in the box body, so that the whole device is relatively stable.
Owner:SHENZHEN TIANJING YUHONG TECHNOLOGY CO LTD
Low earth orbit satellite beam adaptive acquisition method based on fusion double architecture
The invention relates to the technical field of satellite communication, in particular to a low-orbit satellite beam self-adaptive acquisition method based on fused double architectures, which comprises the following steps: realizing local clock calibration by locking a high-orbit satellite broadcast channel and acquiring a target low-orbit satellite almanac; a terminal pose and an array surface temperature gradient are acquired in real time by using an inertial measurement unit and a temperature sensor network, and a multi-dimensional physical characteristic tensor is constructed. Then, inputting the feature tensor into a nonlinear compensation model integrating multi-scale cavity convolution and a spatial self-attention mechanism, and reasoning and outputting a phase pre-distortion matrix; and by executing channel-level Hadamard product operation of the pre-distortion matrix and the theoretical pointing matrix, generating a wave control driving matrix and synthesizing a physical receiving wave beam. After a downlink signal is captured, a real Doppler frequency shift residual error is extracted, an error autocorrelation matrix is constructed, and an almanac compensation weight is reversely corrected. According to the invention, through multi-dimensional feature perception and algorithm logic closed loop, robust beam capture is realized.
Owner:KEYIDEA SATCOM INFORMATION TECH (NANJING) CO LTD
A planetary gear reducer
ActiveCN224283418UGuaranteed rotational stabilityPrecise deliveryGearing detailsGear wheelTorque transmission
This invention provides a planetary gear reducer, belonging to the technical field of reducer technology. It solves the problem of unstable torque in existing technologies. This invention includes a front housing, a gear ring body, a rear housing, a planetary gear assembly, an input shaft, and an output splined shaft. The front housing, gear ring body, and rear housing are connected sequentially, and the planetary gear assembly is installed inside the front housing, gear ring body, and rear housing. The planetary gear assembly includes planetary gears, a sun gear, and a planet carrier. The planet carrier is a hollow annular sleeve with a mounting hole in the center and a connecting ring formed on the rear side. The planetary gears are fitted onto the planetary shafts and located in the mounting hole, meshing with the inner side of the gear ring body. The sun gear is located inside the planet carrier and meshes with the planetary gears. A keyway groove is formed on the inner side of the connecting ring groove on the rear side of the planet carrier, and the output splined shaft is connected to the rear side of the planet carrier through the keyway groove. This invention has the advantages of stable torque transmission and high precision.
Owner:ZHEJIANG WINS MACHINERY
Low-orbit satellite ephemeris analysis method based on satellite orbit plane coordinate system
The invention relates to the field of satellite orbit calculation, in particular to a low-orbit satellite ephemeris analysis method based on a satellite orbit plane coordinate system, which comprises the following steps: acquiring TLE two-line orbit data of a target satellite, geodetic coordinates of a terminal, UTC time and earth rotation average angular velocity; calculating the state of the satellite in the orbital plane; calculating a transformation matrix from a geocentric inertial coordinate system ECI to a satellite orbit plane coordinate system; the LBH coordinates of the terminal are converted into ECEF rectangular coordinates; a rotation matrix from the ECEF to the ECI is constructed, and the ECI system speed of the terminal is calculated; according to the transformation matrix, transforming the ECI coordinate of the terminal into a final satellite orbit plane coordinate system; performing simplified calculation based on a unified calculation framework of a satellite orbit plane coordinate system; and outputting the distance, the relative speed, the Doppler frequency offset and the propagation time delay result which are calculated under the satellite orbit plane coordinate system. And the calculation complexity and the realization difficulty of high-precision orbit forecasting are obviously reduced.
Owner:NANJING UNIV OF POSTS & TELECOMM
Joint actuator and two-stage planetary reducer thereof
The two-stage planetary reducer comprises a first-stage sun gear and a second-stage sun gear which are coaxially arranged, the first-stage sun gear and the second-stage sun gear are sleeved with a long gear ring, and the long gear ring extends to the second-stage sun gear from the first-stage sun gear in the axial direction. A first-stage planet wheel and a first-stage planet carrier for mounting the first-stage planet wheel are arranged between the long gear ring and the first-stage sun wheel; a second-stage planet wheel and a second-stage planet carrier for mounting the second-stage planet wheel are arranged between the long gear ring and the second-stage sun wheel; long inner teeth are arranged on the inner wall of the long gear ring, the first-stage planet wheel is meshed with the first-stage sun wheel and the long inner teeth, and the second-stage planet wheel is meshed with the second-stage sun wheel and the long inner teeth. The long gear ring is fixedly arranged, and the first-stage planet carrier is in transmission connection with the second-stage sun gear. The utility model further discloses a joint actuator. According to the joint actuator and the two-stage planetary reducer thereof, the requirement for a large transmission ratio can be met, and the size cannot be increased.
Owner:CHONGQING BEIDA LANDAI AUTOMOBILE TRANSMISSION CO LTD
Solar energy drag reduction and energy storage aircraft wing and drag reduction and energy storage method
The application provides a solar energy drag reduction and energy storage aircraft wing and a drag reduction and energy storage method, and relates to the technical field of aircrafts.The wing body is internally provided with an angle control system and multiple solar panels.The angle control system comprises a control rod, a connecting rod and a control shaft, the middle part of each solar panel is provided with the control shaft, the two adjacent solar panels are hingedly connected through the connecting rod to form a whole solar panel, and the bottom of the solar panel at the head and tail is provided with the control rod.The control rod is used for adjusting the overall inclination angle of the whole solar panel, and the control shaft is used for adjusting the inclination angle of each solar panel.The multiple solar panels are connected to form a whole solar panel, the overall inclination angle adjustment and the accurate inclination angle adjustment are combined when the angle is adjusted, the solar energy is maximally absorbed, and good economic benefits are achieved, and a reflective coating is designed to reduce the flight resistance.
Owner:SHANDONG UNIV
A transmission sub-transmission planetary array
The application discloses a transmission sub-gearbox planetary gear set and belongs to the technical field of transmissions. The transmission sub-gearbox planetary gear set comprises a planetary gear set and a rear cover shell. The planetary gear set comprises a planetary carrier assembly, a sun gear, planetary gears and a planetary gear ring. The planetary carrier assembly is composed of a front planetary carrier and a rear planetary carrier which are fixedly connected. The front planetary carrier is supported on a second shaft through bearings. The rear planetary carrier is supported on the rear cover shell through bearings. The sun gear is uniformly meshed with a plurality of planetary gears which are supported on a planetary gear shaft through bearings. The plurality of planetary gears are meshed with the inner teeth of the planetary gear ring. The problems of large deflection of the planetary carrier, bending and torsional deformation of the planetary gear shaft and meshing load deviation of the planetary gears caused by the cantilevered planetary carrier are effectively solved. In the application, a thrust ring is connected to the second shaft through splines and is used for contacting the front end of the planetary gear to axially limit the planetary gear. A bearing assembly or a thrust washer is sleeved on the planetary gear shaft and is used for contacting the rear end of the planetary gear to axially limit the planetary gear.
Owner:SHAANXI FAST GEAR CO LTD