250results about How to "Axial space saving" patented technology

A voice coil motor of miniaturized type is featured as applying simple design on radial size of motion-carry base and new material for front and rear spring plates, using separation design on left and right branch plates of said rear spring plate and optimum design on shape as well as distribution of permanent magnetic unit, applying convex-concave fastening design on front-back cover of shell and between front covers for realizing miniatured- size of voice coil motor.

The invention discloses a bearing-free asynchronous motor RBF neural network self-adaptive inverse decoupling control and parameter identification method. An SVPWM module, a voltage inverter, a bearing-free asynchronous motor and a load of the bearing-free asynchronous motor form a whole serving as a composite controlled object. Two radial basis function neural networks are adopted to achieve inverse control and parameter identification conducted on the composite controlled object. A self-adaptive inverse controller is formed by using an RBF neural network through learning, and is serially connected in front of the composite controlled object, errors of a feedback signal and a given signal are input into an inverse controller, and accordingly closed-loop control is formed, then a self-adaptive parameter identifier is formed by using one RBF neural network through learning and identifies output quantity speed and displacement of the composite controlled object, speed-less and displacement-free sensor control is achieved, online learning of an estimation signal is aided by means of a learning algorithm, and non-linear dynamic decoupling control of the bearing-free asynchronous motor is achieved. The bearing-free asynchronous motor RBF neural network self-adaptive inverse decoupling control and parameter identification method is high in control speed and higher in identification accuracy, and a control system is excellent.

The invention relates to a dual-redundancy electro hydraulic servo actuator which comprises a double-outlet rod hydraulic cylinder and a single-outlet rod hydraulic cylinder which are connected in series, wherein one end of the double-outlet rod hydraulic cylinder extends outward, and is connected with load; the rodless cavity side of the single-outlet rod hydraulic cylinder is connected with a displacement sensor; and one end of the double-outlet rod hydraulic cylinder and the rodless cavity side of the single-outlet rod hydraulic cylinder are respectively controlled by a hydraulic control system. According to the invention, the double-outlet rod hydraulic cylinder and the single-outlet rod hydraulic cylinder are adopted to form the dual-redundancy electro hydraulic servo actuator, so that the defect of large occupied space for a dual-redundancy electro hydraulic servo actuator which is composed of two double-outlet rod hydraulic cylinders in series is overcome, thus the structure is more compact, because the control on a single-outlet rod return circuit has a cold and hot oil exchange process, the system working temperature is reduced, and the system works more stably.

The invention relates to a planet row which comprises a sun wheel, a planet wheel and a planet frame, wherein the sun wheel is arranged in the cavity of the planet frame; the planet wheel is supported on the planet frame; a first thrust bearing is arranged between one end face of the sun wheel and the planet frame; a second thrust bearing is arranged on the other end face of the sun wheel; the excircle radius of the first thrust bearing and the second thrust bearing are more than the minimum distance from a tooth crest of the planet wheel to the central line of the planet frame; the thrust bearing is contacted with the surface of the planet wheel; therefore, the planet row can bear higher axial load; a screw passes through the planet frame, is inserted into the other end of a radial through hole and then is sealed; alignment communication of oil ways and the radial through hole is ensured; the planet row is more convenient to install and detach; a gear is arranged at one end of the planet frame; the gear can transmit power to a differential mechanism; the structure is compact; an axial space is saved; the gear and a terminal pad are in welded connection; the planet row is convenient to process; a planet axle is tightly pressed and fixed on the planet frame through the terminal pad; and the planet row is more convenient to install.

The invention relates to an automobile hybrid power assembly, which comprises a motor and an automated mechanical transmission (AMT). The AMT comprises an input shaft, a first middle shaft, a second middle shaft, a motor shaft, a motor idler shaft and an output shaft which are in location matching connection on a case body and parallelly arranged in space, wherein the input shaft is provided with driving gears from a first gear to a sixth gear and a five-gear motor synchronizer; the first middle shaft is provided with driven gears from a first gear to a second gear, one-two-gear synchronizer and a five-gear input gear; the second middle shaft is provided with driven gears from a third gear to a sixth gear, a driving speed reducing gear and a motor synchronizer; the motor shaft is provided with a motor output driving gear; the motor idler shaft is provided with an idler shaft; and the output shaft is provided with a driven speed reducing gear and a differential mechanism. The automobile hybrid assembly resolves the problem of power interruption during shifting of the AMT, greatly improves comfortableness, is compact in structure, saves axial space of the transmission and guarantees installation arrangement in the whole automobile.

The invention discloses a double-clutch lubricating structure for a double-clutch gear box. An electronic oil pump is connected with four lubricating channels through lubricating oil pipes and an oil storage cavity respectively, wherein the main components of the double-clutch, namely a first clutch and a second clutch, are lubricated and cooled by the lubricant liquid of the first lubricating channel; a first input shaft and a second input shaft of the double-clutch gear box are lubricated and cooled by the lubricant liquid of the second lubricating channel; a clutch separation device is lubricated and cooled by the lubricant liquid of the third lubricating channel; a bearing between the first input shaft and a driving device is lubricated and cooled by the lubricant liquid of the fourth lubricating channel. The double-clutch lubricating structure excellently solves the problem that a conventional cooling and lubricating system in a double-clutch gear box is complex in structure, high in cost and low in reliability, and is susceptible to potential safety hazard; the double-clutch lubricating structure provided by the invention is simple in structure, high in reliability and good in safety, and has very high practical value.

The invention discloses an inner-channel vehicle suspension system magnetorheological damper, which comprises a cylinder barrel; a combined electromagnetic piston and a floating piston are arranged in the cylinder barrel in sequence from top to bottom; the combined electromagnetic piston divides the cavity chamber above the floating piston into an upper cavity chamber and a lower cavity chamber, which are filled with magnetorheological fluid; a bottom cover is arranged at the bottom end of the cylinder barrel; the bottom cover is respectively fixedly connected with an inflating and deflating valve and a lower lifting ring; a guide seat is arranged at the upper end of the cylinder barrel; the upper end of the guide seat tightly covers an upper end cover pressing the guide seat; the lower end of the guide seat is fixedly connected with a buffering block; the combined electromagnetic piston is fixedly connected with a piston rod penetrating through the guide seat and the upper end cover to extend outwards; the outer end of the piston rod is fixedly connected with an upper lifting ring of which the inside is provided with a wire outgoing groove. The inner-channel vehicle suspension system magnetorheological damper is simple in structure and low in manufacturing cost, can accurately adjust vehicle vibration generated by random excitation of a road face, and is high in work efficiency and work stability; the floating piston is enabled not to be clamped in the moving process up and down, and is stable when being used for pressure compensating; the liquid cannot easily leak in the work process.

An engine generator has an engine, a generator and a starter 6 for starting the engine, the generator and the starter are arranged outside the engine crankshaft 12 and coaxial at the same side of the engine crankshaft 5 axial direction, one end of the engine crankshaft 5 protruding out the crankshaft 12 is provided with a flywheel 4, the generator is positioned between the starter 6 and the flywheel 4, the generator is of inner rotor structure, the generator rotor 1 is supported on the rotor shaft 2 dismountable connecting with the flywheel 4; an axial hole 9 is provided on the iron core of the generator rotor 1, the axial hole 9 is relative to the position of a ratchet 10 which can axial move on the starter 6. The invention has compact structure and convenient installment, can make the axial size of the engine crankshaft shorter and simplify the structure.

The invention relates to a rotating type varying stiffness flexible joint. The joint is characterized by comprising a driving disc, an end cover, a torsional spring, a special-shaped gear set, a standard gear set, a first shaft, a second shaft, an output shaft, a shaft end fixed frame, a worm, a worm gear, a direct-current speed reduction motor, a coupler, a connecting plate, a worm fixing block, a clamping spring, a motor mounting base, fixing blocks and a bearing pedestal; the driving disc is fixed to the end cover, the end of the driving disc is connected with an outer motor directly through a speed reducer to serve as input of the flexible joint, the bearing pedestal and the shaft end fixing frame are arranged in the driving disc, the bearing pedestal and the driving disc are of an integral structure, the driving disc and the end cover are connected through a bolt to serve as a shell of the joint, the two ends of the shaft end fixing frame are fixed to the driving disc through the fixing blocks, the output shaft is fixedly arranged between the end cover and the shaft end foxing frame through a deep groove ball bearing, and the output shaft is connected with an outer component; the first shaft and the second shaft are fixed to the driving disc and the end cover through the deep groove ball bearing and the bearing pedestal.

The present invention discloses a novel permanent magnet speed regulator using a rotary salient pole to adjust magnetic flux. The novel permanent magnet speed regulator comprises a driving shaft and a driven shaft, the driving shaft is fixedly equipped with a cylindrical conductor rotor, and a permanent magnet rotor of which one end is fixed to the driven shaft is arranged in a chamber formed by the cylindrical conductor rotor. Moreover, a radial gap exists between the permanent magnet rotor and the cylindrical conductor rotor, a ratchet wheel sleeve rotating together with the driven shaft and a salient pole magnetic conductive magnet yoke capable of rotating relatively on the ratchet wheel sleeve are arranged at the lower part of the other end of the permanent magnet rotor, and a plurality of tangential permanent magnet magnetic steels are arranged in the permanent magnet rotor at equal intervals. According to the present invention, the problem that a conventional cylindrical permanent magnet speed regulator adjusts the relative positions of the permanent magnet rotor and the cylindrical conductor rotor in an axial direction to reduce the large the occupied space of an effective part of the coupling area of the permanent magnet rotor and the conductor rotor is avoided, an additional axial space is not needed, and an adjusting mechanism, such as an additional complicated cylinder is also not needed, so that the whole speed regulator is more compact and reasonable in structure, and a transmission torque under the same size is improved substantially.

The invention provides a multi-clutch module, a clutch oil supply system and an electric control hydraulic automatic transmission. The multi-clutch module comprises a shell structure, and an input shaft, a first planet row structure, a second planet row structure, a first clutch structure, a second clutch structure, a third clutch structure and a brake structure arranged in the shell structure; the first planet row structure and the second planet row structure are arranged at the two ends of the input shaft; the first clutch structure is connected to the second planet row structure and the input shaft; the second clutch structure is connected to the second planet row structure and the input shaft; the third clutch structure is connected to the first planet row structure and the input shaft; the brake structure is connected to the second planet row structure and the shell structure; the first clutch structure is positioned on the radial outer side of the input shaft; the second clutch structure and the third clutch structure are positioned on the outer side of the first clutch structure side by side; and the brake structure is positioned on the outer sides of the second clutch structure and the third clutch structure. The multi-clutch module is more compact in structure, reduces occupied space, simplifies the structure, and reduces the assembly requirements.

The invention relates to a three-segment type linear actuator and a driving assembly thereof. The three-segment type linear actuator comprises a driving assembly and a three-segment type lifting tubular column, wherein a hollow screw rod and a driving tube of the driving assembly are sleeved on the outside of an inner screw rod, an outer tube is sleeved on the outside of the driving pipe, a hollow screw rod nut is sleeved on the hollow screw rod, an inner screw rod nut is sleeved on the inner screw rod, the hollow screw rod nut and a fixed seat are fixed at two ends of the outer tube, the hollow screw rod and the driving tube rotate synchronously, the inner screw rod nut is rotatably arranged in the fixed seat, and the inner screw rod nut is fixedly connected with the lower end of the driving tube. The bottom of the fixed seat of the driving assembly is fixed on a first end plate at the lower end of the middle tubular column, and the fixed seat can partially or totally enter an inner tubular column. The three-segment type linear actuator and the driving assembly thereof have the following benefits: the driving assembly becomes an independent assembled module and is compact in structure and strong in adaptability; and meanwhile, the actuator saves the axial space among the three segments of lifting tubular columns as far as possible and can provide a large height adjusting scope.

The invention discloses a driving system of a hybrid vehicle, and belongs to the technical field of vehicle driving. The system involves an engine, a connecting and disconnecting device, a first motor, a first gear assembly, a second motor, and differential devices; one end of the connecting and disconnecting device is connected with the engine through a first transmission shaft; the first motor is connected with the other end of the connecting and disconnecting device through a second transmission shaft; the first gear assembly comprises a plurality of gear pairs; the first motor is connectedto one end of the second transmission shaft, and a third transmission shaft is rotatably connected with the second transmission shaft; the second motor is connected with a fourth transmission shaft arranged on the periphery of the third transmission shaft in a sleeving mode; the differential devices comprise a front differential device and a rear differential device, and the rear differential device is connected with the other end of the third transmission shaft and a rear driving shaft; and the engine, the connecting and disconnecting device, the first motor and the second motor are sequentially arranged at intervals in the direction of vehicle front wheels pointing to vehicle rear wheels. According to the system, the engine can participate in driving when the vehicle speed is high and does not participate in driving when the vehicle speed is low so that a vehicle can be in the most economical working mode, and the oil consumption of the vehicle is reduced.

The invention relates to a grid type control drum device of a small fast neutron reactor. The grid type control drum device comprises an inner reflecting layer, a grid type control drum and an outer reflecting layer which sequentially sleeve the periphery of a reactor core from inside to outside, and a driving motor for driving the grid type control drum; the inner reflecting layer is in a cylindrical grid shape and is fixed in position; the outer reflecting layer is in a complete cylinder shape and is fixed in position; and the grid type control drum is in a cylindrical grid shape and can bedriven by the driving motor to rotate by a certain angle so as to adjust the overlapping area between the absorption grids and the reflection grid of the inner reflecting layer and change the number of leaked neutrons reflected back to the reactor core, so reactivity control is achieved. The device disclosed by the invention is small in occupied axial space, and meets the miniaturization design requirement; the absorption grids have no axial displacement, so that uneven axial power distribution of the reactor core cannot be caused; and the absorption grids are in central symmetry about the central axis of the reactor core, have good adaptability to material expansion caused by radial temperature gradient, and are not easy to block due to deformation.

The invention discloses a collaborative robot modularized joint compact in structure. The modularized joint is composed of a joint shell, a joint output flange, a low-speed wire protection pipe, a harmonic reducer, a motor assembly, a motor shaft, a brake assembly, a motor end encoder assembly and a joint end encoder assembly which are sequentially connected. The low-speed wire protection pipe isconnected with the joint output flange. The harmonic reducer is connected with the joint output flange and the joint shell. The motor assembly comprises a stator and a rotor. The motor shaft is connected with the motor rotor. One end of the motor shaft is connected with the input end of the harmonic reducer. The brake assembly is of a magnetic attraction friction type, capable of achieving lockingwhen powered off, capable of achieving unlocking when powered on and connected to the motor shaft. Compared with a plug pin type brake, sudden stop is safe, and stop pins cannot be bent. A motor endencoder coded disc and a joint end encoder coded disc are concentrically arranged. A motor end encoder reading head and a joint end encoder reading head are integrated together, the axial space of thejoint can be compact, the integration level can be high, the wiring space is large, and operation is facilitated; and meanwhile the modularized joint further has the characteristics of being high inrigidity and large in load-dead weight ratio.

An underwater electromagnetic separation electric connector contains two parts, namely a plug and a socket. The socket comprises a socket limit steel ball (1), an unlocking sleeve (2) and a socket body (3). The plug comprises a plug body (4), an electric signal receiving end (5), a limit collar (6), a bumping sleeve (7), a plug limit steel ball (8), a spring (9), a reed set (10), a movable electromagnet (11), a fixed electromagnet (12) and a tail cover (13). By electrifying the electromagnet, magnetism is generated and motion in opposite directions happens. Thus, the plug is driven for mechanical movement on equipment and separation of the plug and the socket is realized. Therefore, separation can be realized only by externally inputting an electric signal without design of a motor. The electric connector provided by the invention has an ingeniously-designed structure. By the adoption of the electric connector, the whole occupying space of separation units of the equipment can be minimized.

The invention relates to a dual-motor driving system. A shell is internally provided with a first motor and a second motor separately, and the first motor serves as a main driving motor and is used for outputting kinetic energy; the second motor is an auxiliary driving motor, and an output shaft of the second motor is connected with an output shaft of the first motor through a one-way clutch and used for providing auxiliary output kinetic energy for the first motor. The connection between the first motor and the second motor is adjusted through the one-way clutch so that the maximum output power can be provided in the speed-up stage of a vehicle, and meanwhile, in the high-speed running stage of the vehicle, only the main driving motor provides the output power to ensure the maximum vehicle speed. Meanwhile, the system is simple in structure, reasonable in layout and low in manufacturing cost.

The invention provides a washing machine deceleration clutch and a washing machine. The washing machine deceleration clutch comprises an input shaft, a deceleration device, a clutch device, an output shaft and an output shaft sleeve, wherein the clutch device is formed by a clutch platen and a clutch shaft sleeve; the clutch shaft sleeve covers the circumferential periphery of the deceleration device; the clutch platen rotationally move surrounding the axis to drive the clutch shaft sleeve to axially move; a first position of the clutch shaft sleeve movement is connected with a fixing device; the fixing device and an external cylinder of the washing machine are relatively fixed, so a washing work condition can be achieved; a second position of the clutch shaft sleeve movement is connected with a rotor of a direct-drive motor, so a dehydrating work condition can be achieved. The clutch device is arranged on the circumferential periphery of the deceleration device, so overall height of the deceleration clutch can be reduced, washing machine size can be reduced with the same of the washing capacity or washing capacity can be increased with the same of the washing machine size.

The invention relates to a large-scale self-monitoring conical roller bearing for a generator, and belongs to the technical field of bearings. A shell is fixed to an outer ring, and an end cover is installed at the end of the shell. A partition plate on the shell divides a shell cavity into an inner cavity and an outer cavity. A circuit board and a sensor are installed at the bottom of the outer cavity. One end of an energy converter composed of a piezoelectric plate and a metal sheet is fixed to the inner wall of the outer cavity of the shell, the other end of the energy converter is riveted to a sliding block, and an oscillating magnet is arranged at the other end of the sliding block. A rotary table flange is installed on an inner ring, a rotating shaft of a rotary table is connected into a center hole of the shell in a sleeved mode, a rotating magnet is embedded in the rotating shaft, and the rotating magnet is close to the opposite-pole magnetic pole of the oscillating magnet. The large-scale self-monitoring conical roller bearing has the advantages that the self-energy-supply sensing monitoring function is achieved, the structure of an installing device does not need to be changed, and true real-time online monitoring can be achieved. The energy converter generates power through radial stretching and stimulating, the axial space is small, and the magnets are far away from a rolling body and a radiating circuit. The piezoelectric crystal plate bears pressure stress all the time, the stress is evenly distributed, the mechanical reliability is high, and the power generating capacity is high.

The invention discloses an outer rotor plane motor traction machine and relates to the technical field of motors. The outer rotor plane motor traction machine comprises a motor stator, a traction sheave, a permanent magnet, an encoder and a disc brake, steel wire rope grooves are formed in the outer surface of the traction sheave, the permanent magnet is attached to the inner side surface of the traction sheave, the motor stator is installed inside a motor shell, symmetric three-phase alternating current coils are wound on the motor stator, the encoder is installed in the middle of a hollow shaft of a motor, a vertical plate is installed at one side of the motor shell, and the disc brake is fixed on the vertical plate. According to the outer rotor plane motor traction machine, the structural design is reasonable, the axial direction space is saved, the axial direction thickness is reduced, the practicability is great, the application range is wide, and the stable operation of an elevator lift car is guaranteed.

The invention relates to a large-sized self-monitoring cylindrical roller bearing, and belongs to the technical field of bearings. An inner cylinder is fixed on an inner ring, and an inner partition plate, a circuit board and a sensor are installed on the inner side of the bottom wall of the inner cylinder; an outer cylinder is fixed on an outer ring, and sleeves outside the inner cylinder; a spline shaft table and an outer partition plate are arranged on the bottom wall of the outer cylinder, a magnetic ring is arranged on the spline shaft table in a sleeving manner, and a ring groove is formed between the outer partition plate and the inner partition plate; one end of a tension type transducer is installed on the side wall of the inner cylinder, the other end of the transducer is riveted with a T-shaped magnetic block by a rivet, the magnetic block is arranged in the ring groove between the inner partition plate and the outer partition plate in the sleeving manner, and the magnetic block is installed in a manner that the opposite magnetisms of the magnetic block and the magnetic ring are close. The large-sized self-monitoring cylindrical roller bearing has the advantages and characteristics of having self-energized sensing and monitoring functions without changing the structure of installation equipment, and being capable of achieving real-time on-line monitoring in a true sense; the transducer generates power by radial tensile excitation, the axial space is small, and a magnet is away from a rolling body and a transmission circuit; and a piezoelectric plate always bears compressive stress, the stress distribution is uniform, the mechanical reliability is high, and the power generation capacity is high.

A vehicle transaxle includes an input, a splitter gearset including a member connected to the input, a second member connected to a motor-generator and a first output, a traction gearset including a third member connected to a traction motor, a fourth non-rotating member and a second output, a chain drive connected to the first and second outputs, and a differential driven by the chain drive for transmitting power to vehicle wheels.

The invention discloses a tractor load reversing clutch device. The device mainly comprises a clutch shaft, a left input gear, a clutch hub, a clutch pressure plate, a clutch friction plate, a release spring, an antifriction block, a clutch piston, a clutch shell and a right input gear. The left input gear, the clutch hub and the clutch piston are sequentially arranged on the left half part of the clutch shaft to form a clutch F, wherein the left input gear and the clutch piston are sleeved by a clutch shaft sleeve; and the clutch hub is fixedly connected with the clutch shaft. The clutch piston, the clutch hub and the right input gear are sequentially arranged on the right half part of the clutch shaft to form a right clutch R, wherein the right input gear and the clutch piston are sleeved by the clutch shaft sleeve; and the clutch hub is fixedly connected with the clutch shaft. The device is a left clutch and a right clutch. Because pressure oil paths are differently controlled, the service life of the clutch is prolonged. Under the action of the release spring, two oblique planes of the clutch shaft and the piston are closely attached, so that the device is automatically sealed and the dragging moment of the clutch is reduced.

The invention discloses an automobile gas-electric hybrid power gearbox. The automobile gas-electric hybrid power gearbox comprises an engine, a hybrid power module and a gearbox body. The hybrid power module is composed of a motor and a single-planet-wheel planet row. A rotor of the motor is connected with a sun wheel of the planet row. An output shaft of the engine is connected with a gear ringof the planet row. An input shaft of the gearbox body is connected with a planet carrier of the planet row. A brake is arranged between the gear ring of the planet row and a shell of the hybrid powermodule. A first clutch is arranged between the sun wheel and the planet carrier and used for generating a pair of torque which is equal in magnitude and opposite in direction and acts on the sun wheeland the planet carrier correspondingly. The angular acceleration of an engine shaft and the angular acceleration of both the input shaft of the gearbox body and the planet carrier are selected reasonably, thus the engine can be accelerated to a preset rotational speed within the expected time and is ignited to be started, and smooth travelling of a vehicle is maintained. According to the automobile gas-electric hybrid power gearbox, the function of pure electric drive and the function of staring the engine in traveling are achieved, and the engine is started quickly and smoothly in a pure electric drive mode.

The invention discloses a compact-type rotor structure with a rotor wind path, and solves the problems that a conventional rotor is not reasonable in structural space, and a wind path is not reasonable in structure. The structure comprises a rotating shaft, a rotor iron, a guide strip, an end ring, a wind outgoing end rotor pressure plate, and a wind incoming end rotor pressure plate. The rotor core is dispose don the rotating shaft in a sleeving manner, and the guide strip is inserted into the rotor core. The end ring is fixed at an end part of the guide strip, and the wind outgoing end rotor pressure plate and the wind incoming end rotor pressure plate are respectively disposed at two ends of the rotor core in a compressed manner. The wind outgoing end rotor pressure plate and the wind incoming end rotor pressure plate are respectively provided with a ventilating hole, a balance slot, a balance block, and a pressure plate tooth. The structure reduces the axial space dimension of a pull motor, saves a rotating part, and improves the reliability of the motor. The whole structure effectively cools the rotor core, changes the wind path through the rotor pressure plates under the condition of not changing air volume, and prevents cooling air after heating from acting on other parts.

The present invention discloses a wind turbine gearbox and a sun gear and planet carrier spline pair connection structure thereof. The connection structure comprises a first stage sun gear, a second stage planet carrier, protruding plates and a rubber gasket; the second stage planet carrier has an internal spline segment; the first stage sun gear has an external spline segment; the external spline segment and the internal spline segment are engaged to form a spline pair; a plurality of bosses are arranged with certain intervals and are all positioned at an upwind direction end of the external spline segment; the bosses are also attached to an upwind direction end surface of the second stage planet carrier; the rubber gasket is disposed between the two half rings and a complete circular ring is formed; a first oil inlet circular groove is formed between the circular ring and a shaft body of the first stage sun gear; a second oil inlet circular groove is formed between the circular ring and the shaft body, the upwind direction end surface of the external spline segment, and the upwind direction end surface of the second stage planet carrier; the bosses of the first stage sun gear are positioned in the second oil inlet circular groove; and the wind turbine gearbox comprises a box body, a first stage planetary gear train and a second stage planetary gear train. Lubricating and cooling effects are good, axial space is effectively shortened, and strength is guaranteed.

The invention belongs to the technical field of power transmission, and particularly relates to a serial-parallel hybrid power transmission device. The passenger-car serial-parallel hybrid power transmission device comprises an electric generator and a motor which are not arranged coaxially. An engine input shaft is connected with an input shaft through a main clutch and a shock absorber, the input shaft is fixedly connected with a first gear, and on one hand, a second gear arranged on an intermediate shaft in an empty sleeving mode is engaged with the first gear and a seventh gear, and on the other hand, the second gear is fixedly connected with a clutch; the seventh gear is fixedly connected with an electric generator output shaft, a third gear and a fifth gear are fixedly connected with the intermediate shaft, and the third gear is engaged with a second gear; and the second gear is fixedly connected with a motor output shaft, the fifth gear is engaged with a sixth gear, and the sixth gear is fixedly connected with a differential mechanism on the output shaft. According to the serial-parallel hybrid power transmission device, the electric generator and the motor are not arranged coaxially so that the axial space of the transmission device can be shortened, and the serial-parallel hybrid power transmission device is suitable for passenger cars where A-grade to C-grade transverse engines are arranged.

The invention discloses a quasi-zero stiffness-based vibration isolator, and belongs to the field of ultra-precise vibration attenuation. The vibration isolator is characterized in that an magnetorheological elastomer relatively low in stiffness is connected in parallel on the basis of taking a slotting belleville spring having a negative stiffness displacement region as a main elastic component;stiffness of the magnetorheological elastomer is regulated by a stiffness regulating device, so that a whole vibration isolation system connected in parallel by the slotting belleville spring and themagnetorheological elastomer under a load meets the need of quasi-zero stiffness under a certain working displacement region, and a possibility is provided for realizing low inherent frequency, high load-carrying capacity and small deformation required by the precise vibration isolation system.

The invention discloses a brake cylinder comprising a cylinder body and a rear cover, wherein the cylinder body is internally provided with a cylinder core; the cylinder core comprises a piston and a piston rod and is of an integral structure; the cylinder body is in an integral structure which contains a front cover and is molded through casting; and the piston rod of the cylinder core is in a hollow structure in which a spring is arranged. The brake cylinder is a single-action introduced-in ultrathin cylinder, has the advantages of simple structure, beautiful appearance, safety, reliability and long service life.