612 results about "Continuously variable transmission" patented technology

The invention relates to the technical field of stepless speed change control, and discloses a stepless speed change zeroing control system based on a direct-axis electric drive axle, which comprises a signal acquisition module, a torque analysis module, a zeroing control module, a mode switching module, a reference calibration module and an execution output module. The signal acquisition module acquires a rotating speed signal and torque data and sets a zero setting detection interval; the torque analysis module divides torque compensation nodes and generates feature vectors; the zero setting control module establishes a correction rule and obtains a compensation parameter; the mode switching module identifies an output mode and calculates a rotating speed fluctuation amplitude; the reference calibration module deduces an optimal zeroing threshold value and generates a torque deviation sequence; and the execution output module integrates to form a control scheme. The system achieves torque dynamic compensation, rotation speed fluctuation suppression and threshold value self-adaptive calibration through multi-module cooperation, improves the stability and control precision of an electric drive axle under complex working conditions, and is suitable for stepless speed change control of an electric vehicle.

A hybrid system for drones and other modes of transport. A combustion engine provides range and / or lifting capacity for drones while electric motors / generators provide both control and maneuverability. One or more combustion engines, in conjunction with one or more electric motors / generators form a propulsion system whereby each is connected to and drives its own driving pinion in one or more planetary gear sets, and provide continuously variable transmission for driving propellers or driveshafts. The combustion engine may be connected directly to one of the planetary gear's driving pinions, or can drive one of the planetary gear's driving pinions. If the propellers are only driven by either a combustion engine, or an electric motor / generator, the other engine / motor will be kept at rest by a braking device for a combustion engine or a braking device for an electric motor / generator.

The invention relates to a stepless speed change electric drive axle system and a vehicle, and the system comprises a motor which is used for providing power; the first gear set is in transmission connection with the motor and distributes power; the input end of the stepless speed regulating mechanism is connected with the first gear set, and the stepless speed regulating mechanism is used for achieving stepless speed change; the planetary gear train comprises a sun gear, a planet gear, an inner gear ring and a planet carrier, the sun gear is in transmission connection with the first gear set, and the inner gear ring is in transmission connection with the output end of the stepless speed regulating mechanism; the differential mechanism is in transmission connection with the planet carrier and used for outputting power to wheels; the first gear set shunts power to the stepless speed regulating mechanism and the sun gear, and the two paths of power are coupled in the planetary gear train and then output to the differential mechanism through the planet carrier. The stepless speed regulating mechanism enables the rotating speed of the inner gear ring to be steplessly adjustable by adjusting the displacement and the rotating speed, so that stepless adjustment of the output rotating speed of the planet carrier is achieved.

The continuously variable transmission comprises a main transmission mechanism, an auxiliary transmission mechanism and a transmission belt, and the auxiliary transmission mechanism is in transmission connection with the main transmission mechanism; the transmission belt is in transmission connection with the auxiliary transmission mechanism and the main transmission mechanism and transmits driving force between the auxiliary transmission mechanism and the main transmission mechanism. The main transmission mechanism comprises a main shaft, a thrust disc assembly and a main sliding wheel assembly. The thrust disc assembly is arranged on the main shaft in a sleeving mode and fixedly connected with the main shaft. The main sliding wheel assembly comprises a centrifugal block and a main sliding wheel body, one end of the centrifugal block is rotationally connected with the main sliding wheel body, and the other end of the centrifugal block abuts against the thrust disc assembly. The centrifugal block comprises an abutting part, a centrifugal block body and a limiting part, the abutting part is located on the side, close to the main sliding wheel body, of the centrifugal block body and can abut against the main sliding wheel body, and the limiting part is located on the side, close to the thrust disc assembly, of the centrifugal block body. By means of the arrangement mode, the internal stress of the continuously variable transmission during working can be effectively reduced, and the running reliability of the continuously variable transmission is higher.

The invention relates to a drive device (2) for a bicycle (1), comprising a pedal crank shaft (19), a first electric machine (18), a first partial transmission (6), a second electric machine (49), and a second partial transmission (7), wherein a first transmission element of the first partial transmission (6) is operatively connected to the first electric machine (18), wherein a second transmission element of the first partial transmission (6) is operatively connected to a second transmission element of the second partial transmission (7), wherein a third transmission element of the first partial transmission (6) is operatively connected to an output gear (8), wherein a first transmission element of the second partial transmission (7) is operatively connected to the second electric machine (49), and wherein a third transmission element of the second partial transmission (7) is fixed to a housing (3), and wherein a freewheel (14) is arranged between the pedal crank shaft (19) and the second transmission element of the first partial transmission (6).Furthermore, the invention relates to a bicycle (1) with such a drive device (2).

A utility vehicle includes a frame assembly, a plurality of ground-engaging members supporting the frame assembly, and a powertrain assembly operably coupled to the ground-engaging members and including a prime mover and a continuously variable transmission. Additionally, the utility vehicle includes an operator defined by a portion of the frame assembly and including seating for at least an operator. The utility vehicle also includes an electrical assembly comprising an electric motor operably coupled to the continuously variable transmission. The electric motor is positioned rearward of the operator area.

The present invention relates to a continuously variable transmission for a bicycle. The continuously variable transmission for a bicycle can automatically shift gears continuously in response to changes in driving force and load according to the bicycle-riding environment without user intervention, recharges, by means of a generator, with power generated during riding and shifting, prevents reverse rotation of the central shaft, and also allows transmission to be manually controlled by means of a load-providing unit when necessary. To that end, the continuously variable transmission for a bicycle comprises: a transmission unit which receives rotational power from the central shaft, which is driven and rotated by a user, and automatically shifts gears in response to resistance when rotating, the rotational power being delivered in the order of a first carrier, a first planetary gear, a first ring gear, a first sun gear, and an output shaft; and a load-providing unit which is installed to engage with the transmission unit and selectively provides a load to the transmission unit. Therefore, the continuously variable transmission for a bicycle facilitates gear changes based on the bicycle-riding environment.

A human-electric hybrid powertrain with a continuously variable transmission achieved with the use of a bevel planetary gearset. Two electric motors are utilized to produce a hybrid powertrain with either a driveshaft, chain, or belt driveline. The electric motors combine to produce an infinitely variable range of gear ratios and power assistance to the operator.

An all-terrain vehicle (ATV) has a frame having front and rear ends, an internal combustion engine connected to the frame, the engine including a front portion and a rear portion, a single cylinder defining a cylinder axis, an air intake port defined in the front portion facing towards the front end of the frame, and an exhaust port defined in the rear portion facing towards the rear end of the frame. The ATV further has an exhaust assembly fluidly connected to the exhaust port. The exhaust assembly extends from the engine towards the rear end of the frame. The ATV further has a continuously variable transmission operatively connected to the engine, which includes a primary pulley being operatively connected to the engine, a secondary pulley, a drive belt looped around the primary and secondary pulleys, and a housing enclosing the primary pulley, the secondary pulley, and the drive belt.

The invention relates to a drive device (2) for a bicycle (1), comprising a pedal crank shaft (19), a first electric machine (18), a first partial transmission (6), a second electric machine (49), and a second partial transmission (7), wherein a first transmission element of the first partial transmission (6) is operatively connected to the first electric machine (18), wherein a second transmission element of the first partial transmission (6) is operatively connected to a second transmission element of the second partial transmission (7), wherein a third transmission element of the first partial transmission (6) is operatively connected to an output gear (8), wherein a first transmission element of the second partial transmission (7) is operatively connected to the second electric machine (49), and wherein a third transmission element of the second partial transmission (7) is fixed to a housing (3), and wherein a freewheel (14) is arranged between the pedal crank shaft (19) and the second transmission element of the first partial transmission (6).Furthermore, the invention relates to a bicycle (1) with such a drive device (2).

An electric drill reduction structure and an electric drill. The present invention relates to an electric drill reduction structure and an electric drill, and provides an electric drill reduction structure, wherein the electric drill reduction structure comprises a wheel-type continuously variable transmission and a cycloidal pinwheel reducer. The present invention also provides an electric drill, which has the above-mentioned electric drill reduction structure. The electric drill reduction structure comprises a wheel-type continuously variable transmission and a cycloidal pinwheel reducer, and has the characteristics of a wide speed regulation range, stepless speed regulation, balanced operation, low noise, etc., and overcomes the problems of gear box grease easily flowing out of the shift hole and gear shift jamming in traditional structures. The electric drill equipped with the electric drill reduction structure is far superior to traditional gear box hand drills in terms of speed, torque and impact rate in screwdriver mode. Because stepless speed regulation can be achieved, no matter how much power is required, the user can always adjust the speed ratio of the reduction to make the power motor always operate under the maximum power or highest energy efficiency condition.

Embodiments of the present disclosure describe a drive pulley for a continuously variable transmission including a stationary sheave with a stationary shaft, a movable sheave axially movable relative to the stationary sheave and in contact with the stationary shaft; a spider in contact with at least the moveable sheave and stationary shaft; a spring member, biasing the movable sheave axially away from the stationary sheave; at least one centrifugal actuator including an arm pivotally connected to one of the movable sheave and the spider, the arm pivoting away from the one of the movable sheave and the spider as a speed of rotation of the drive pulley increases, the arm pushing against another one of the movable sheave and the spider as the arm pivots away from the one of the movable sheave and the spider, thereby moving the movable sheave axially toward the stationary sheave, the at least one centrifugal actuator being disposed radially outward of the stationary sheave shaft; and a torque transfer assembly operatively connected to at least one of the spider and the movable sheave, the torque transfer assembly transferring torque between the spider and the movable sheave, the torque transfer assembly including, a torque bearing assembly and at least one roller assembly, positioned on a helixed torque pin, the torque pin connected to the spider; wherein as the roller assembly wears, the at least one roller assembly tracks along a helixed path of the torque pin in a distal direction from the bearing assembly.

A compact-size CVT in a mid-drive motor package for an electric bicycle includes planetary gear systems coupled to motors, which are each coaxial along a longitudinal axis through a crankshaft insertable through the planetary gear system and motors. A two-gearbox CVT includes an assistant subassembly with an assistant motor and an assistant gearbox, and a shifting subassembly with a shifting motor and a shifting gearbox, for providing the power output of the assistant subassembly and the shifting subassembly, along with an optional user input from a crankshaft. A three-gearbox CVT includes an assistant subassembly with an assistant motor and an assistant gearbox, a shifting subassembly with shifting motor and shifting gearbox, and a planetary gear system for providing the power outputs of the assistant subassembly and the shifting subassembly, along with an optional user input from a crankshaft. Controlled power output by the shifting and assistant motors promotes CVT functionality.

Embodiments of the present disclosure describe a drive pulley for a continuously variable transmission including a stationary sheave with a stationary shaft, a movable sheave axially movable relative to the stationary sheave and in contact with the stationary shaft; a spider in contact with at least the moveable sheave and stationary shaft; a spring member, biasing the movable sheave axially away from the stationary sheave; at least one centrifugal actuator including an arm pivotally connected to one of the movable sheave and the spider, the arm pivoting away from the one of the movable sheave and the spider as a speed of rotation of the drive pulley increases, the arm pushing against another one of the movable sheave and the spider as the arm pivots away from the one of the movable sheave and the spider, thereby moving the movable sheave axially toward the stationary sheave, the at least one centrifugal actuator being disposed radially outward of the stationary sheave shaft; and a torque transfer assembly operatively connected to at least one of the spider and the movable sheave, the torque transfer assembly transferring torque between the spider and the movable sheave, the torque transfer assembly including, a torque bearing assembly and at least one roller assembly, positioned on a helixed torque pin, the torque pin connected to the spider; wherein as the roller assembly wears, the at least one roller assembly tracks along a helixed path of the torque pin in a distal direction from the bearing assembly.

A design method of CVT (continuously variable transmission) push pieces belongs to the technical field of CVT metal belt type continuously variable transmissions, and comprises the following steps: firstly, confirming design parameters, then sequentially arranging the push pieces on a minimum pitch circle of a steel ring according to the diameter D of the minimum pitch circle of rotation of the steel ring, and further confirming and correcting interference positions among the push pieces; and designing other parameters. According to the CVT pushing piece design method, the reasonable pushing piece size can be designed according to matched components such as a cone pulley and a steel ring, stable operation of metal belt type stepless speed change is guaranteed, and interference in operation is avoided.

The invention relates to a method for operating a drive train (20), wherein the drive train (20) has previously been converted from an internal combustion engine drive to an electric motor drive, wherein the drive train (20) comprises an electric motor (21), a continuously variable transmission (12), an electric motor control unit (23), a transmission control unit (14) and a driving strategy control unit (15), wherein the electric motor (21) is coupled to the continuously variable transmission (12), wherein the electric motor (21) is operated according to a control signal from the electric motor control unit (23), wherein the continuously variable transmission (12) is operated according to a control signal from the transmission control unit (14) and wherein the electric motor control unit (23) and the transmission control unit (14) are operated according to a control signal from the driving strategy control unit (15).The method according to the invention is characterized in that an overload situation of the drive train (20) is detected by a sensor and the drive power of the electric motor (21) is subsequently limited. The invention further relates to an electrified drive train.

A vehicle may include a continuously variable transmission which requires non-recycled air. The continuously variable transmission may provide non-recycled air to a first number of sheaves of the continuously variable transmission with a second number of air supply conduits, the second number being less than the first number. A cover of the continuously variable transmission may have a unitary body.

[Problem] A transmission structure that may improve a traveling feeling when a drive traveling state is interrupted in traveling and then the drive traveling state is resumed is provided. [Solution] A control device actuates a clutch actuator so that only a clutch mechanism on a most downstream side in a transmission direction in a selected shift gear is brought to a disengaged state when receiving a power cut-off signal in a state in which a traveling state change member is subjected to a forward operation or a reverse operation, and, actuates the clutch actuator so that only the clutch mechanism on the most downstream side in the transmission direction in the selected presumed shift gear is brought to a disengaged state based on a traveling state, and in addition, actuates a gear shift actuator so that a gear ratio of a continuously variable transmission mechanism that realizes a vehicle speed at that time point in the presumed shift gear is obtained while the power cut-off signal is valid, and actuates the clutch actuator so that the clutch mechanism on the most downstream side in the transmission direction in the presumed shift gear at that time point is brought to an engaged state when a cancel signal for canceling the power cut-off signal is input.

To provide a control device of a vehicle and a control method of the vehicle capable of reducing influence on a transmission by air suction of an electric oil pump.SOLUTION: A control device for a vehicle including a belt continuously variable transmission having a mechanical oil pump driven by an engine for driving drive wheels and an electric oil pump driven by an electric motor controls driving of the electric motor so as to supply hydraulic pressure from the electric oil pump to the belt continuously variable transmission when a rotation speed of the engine becomes equal to or lower than a predetermined rotation speed due to deceleration of the vehicle, and does not drive a second drive source for driving the second oil pump when a deceleration of the vehicle exceeds a predetermined deceleration.SELECTED DRAWING: Figure 1

The invention relates to a drive device (2) for a bicycle (1), comprising a housing (3) in which a drive arrangement (6) with a crankshaft (4) adjustable in its stroke and with several individual cranks (5), a driven arrangement (7) with an output shaft (9) operatively connected to a driven gear (8), and a crank-driven CVT transmission (10) operatively connecting the crankshaft (4) and the output shaft (9), with an adjusting device (11) for setting an eccentricity of eccentrics (12) of the crank-driven CVT transmission (10) operatively connected to the individual cranks (5), are arranged. The invention further relates to a bicycle (1) with such a drive device (2).

A control system for mixing materials for livestock feed including a container that receives the materials, agitators that mix the materials in the container, a driveline that drives the agitators at an output speed with an output torque, a power source that provides an input speed at an input torque, a continuously variable transmission that connects the driveline and the power source and having a hydrostatic loop to provide a speed ratio between the input speed and the output speed, a plurality of sensors positioned between the power source and the agitators that provides mixing signals commensurate to mixing parameters, and an electronic control unit configured to receive the mixing signals, extract mixing parameter values from the mixing signals, and actuate the continuously variable transmission and adjust the speed ratio based on the mixing parameter values to enhance efficiency of the mixing of the materials.

The application provides a hydraulic system of a hydraulic mechanical continuously variable transmission suitable for a large-horsepower tractor, and belongs to the technical field of tractor hydraulic systems. The hydraulic system comprises an oil pan, a lubricating hydraulic system, a working hydraulic system and a compensation system. The oil pan is connected with an oil inlet of a coarse filter. A lubricating pump of the lubricating hydraulic system, a system pump of the working hydraulic system and a compensation pump of the compensation system are connected in parallel and share an oil suction port. The oil suction port is connected with an oil outlet of the coarse filter. A PTO control hydraulic system, a direction gear control hydraulic system, a speed gear control hydraulic system and a double-station unit control hydraulic system are sequentially arranged on a working hydraulic pipeline. The hydraulic system is responsible for controlling the combination and disconnection of five groups of wet clutches to form gear intervals, controlling the combination and disconnection of a PTO clutch, controlling the change of a static liquid unit swing angle, controlling the flow distribution of a three-union oil pump, controlling the oil compensation of the static liquid unit and the forced lubrication of the entire transmission.

The invention relates to a method for converting a drive train (10) designed for an internal combustion engine (11) for a working machine to an electrically driven drive train (20) for a working machine, wherein the drive train (10) comprises an internal combustion engine (11), a continuously variable transmission (12), an internal combustion engine control unit (13), a transmission control unit (14) and a driving strategy control unit (15), wherein the internal combustion engine (11) is replaced by an electric motor (21) and the electric motor (21) is coupled to the continuously variable transmission (12) in a drive-related manner, wherein the internal combustion engine control unit (13) is replaced by an electric motor control unit (23) and the electric motor control unit (23) is coupled to the transmission control unit (14) in terms of data technology, and wherein the transmission control unit (14) and the electric motor control unit (23) are controlled by the driving strategy control unit (15) according to a drive requirement.The method according to the invention is characterized in that the electric motor control unit (23) is controlled by the driving strategy control unit (15) as if it were the combustion engine control unit (13).

This application discloses a speed control mechanism for the header of a corn harvester, comprising a power input unit, a continuously variable transmission unit, and a header drive unit connected in sequence. Two symmetrically arranged continuously variable transmission units each include a transmission box, a planetary gear assembly inside the box, and a hydraulic motor outside the box. The planetary gear assembly consists of a sun gear input shaft, a continuously variable output shaft, a sun gear, planet gears, a planet carrier, and an external gear ring. The hydraulic motor drives the external gear ring through a gear pair. By changing its speed and direction, the speed ratio of the planetary gears is continuously adjusted, thereby achieving stepless and smooth control of the output shaft speed. Power is transmitted to the ear-picking boxes and auger on both sides of the header via the header drive unit. This mechanism integrates planetary transmission and hydraulic motor speed control into a compact structure, provides smooth transmission, allows for stepless online adjustment of the header speed to adapt to working conditions, improves work quality and efficiency, and has overload protection.

The invention relates to the technical field of stepless speed change, in particular to an inclined journal stepless speed change method and a gearbox, the gearbox comprises a speed change mechanism, a linkage assembly, a transmission gear assembly, a speed regulation journal and an output gear assembly which are installed on a box body, and the method comprises the following steps that S1, the speed change mechanism drives a linkage rack to move so that the linkage rack can drive a linkage piece to move; s2, after the linkage piece moves, the driving point position of the linkage piece driven by the speed regulation shaft neck is changed, and then the movement stroke of the linkage piece is changed; s3, the stroke of the linkage piece is changed, so that the output speed of the transmission gear assembly driven by the linkage rack is changed; s4, changing the output rate of the transmission gear assembly to realize speed change of the output gear assembly; according to the inclined journal stepless speed change method and the gearbox, the motion stroke change of the speed regulation journal is directly converted into the motion stroke change of the linkage rack, intermediate links in the speed change process are reduced, motion is directly converted through the linkage assembly, power loss is reduced, and the stability of the working state and the speed change process is improved.

The application relates to an all-terrain vehicle and a method for controlling an engine in the vehicle, wherein the method for controlling the engine in the vehicle comprises the following steps: acquiring vehicle running information of the vehicle at a first time, acquiring environment temperature information of the continuously variable transmission at the first time; acquiring pre-set environment temperature information matched with the vehicle running information at the first time according to the vehicle running information at the first time; comparing the environment temperature information of the continuously variable transmission at the first time with the pre-set environment temperature information, and determining whether the continuously variable transmission slips at the first time; and if the continuously variable transmission slips at the first time, adjusting the torque output by the engine according to the vehicle running information at the first time. Through the application, the problem of transmission belt damage caused by the slipping of the continuously variable transmission of the all-terrain vehicle is solved.

Systems and methods for controlling transmissions having CVTs are disclosed with multiple modes and gearing arrangements for range enhancements, where embodiments include synchronous shifting to allow the transmission to achieve a continuous range of transmission ratios, while minimizing “empty” cycling of the CVT during mode shifts. Embodiments provide for wide ratio range and performance and efficiency flexibility, while maximizing CVT usage through synchronous shifting.

The utility model discloses a tractor stepless speed change control and engine safe starting linkage mechanism which comprises a connecting machine frame and a hydrostatic stepless speed changer arranged in the connecting machine frame, the connecting machine frame is located in a tractor head, an advancing pedal and a buffering pull rod are arranged in the connecting machine frame, and the buffering pull rod is located in the connecting machine frame. A front limiting bolt is arranged at the lower end of the advancing pedal and installed on the outer side of the tractor head, and a safety starting switch is arranged in the connecting rack. According to the tractor stepless speed change control and engine safe starting linkage mechanism, the contact arc line of the HST control rocker arm and the bearing is designed, it is guaranteed that the distance between the bearing and the rotating axis of the HST control rocker arm is the shortest when the bearing is located at the neutral position, and when a control pedal is in an advancing or retreating state, the bearing is away from the axis of the HST control rocker arm; therefore, the neutral positioning rod is pulled to be away from the safety starting switch, the whole machine is in a non-starting protection state, and the starting safety of the whole machine is improved.

Power-split continuously variable transmission system for stepless transmission of drive power for an agricultural vehicle, with an input element for introducing torque and speed at least two switchable output elements for outputting torque and speed, an electromagnetic gear stage with an inner and a middle rotor and an outer stationary ring element, which are mounted concentrically to each other, a mechanical gear stage connected to the electromagnetic gear stage, wherein the outer ring element of the electromagnetic gear stage has electromagnetic coils to generate an electromagnetic field, and an output element is actuated solely by the electromagnetic gear stage, and a further output element is actuated by the electromagnetic gear stage and the mechanical gear stage, wherein the continuously variable transmission system is designed such that the same rotational speed is present between two output elements at a switching point in order to carry out a switching between them synchronously.

The invention discloses a stepless speed change mechanism suitable for multiple scenes, and relates to the technical field of stepless transmissions.The stepless speed change mechanism comprises a base, one or two conical shafts, a transmission belt, an adjusting mechanism and an output mechanism, and the conical shafts, the transmission belt, the adjusting mechanism and the output mechanism are all arranged on the base; the conical shaft, the adjusting mechanism and the output mechanism are in transmission connection with the transmission belt; the adjusting mechanism is used for changing the transmission ratio of the stepless speed change mechanism and can also change the winding direction and the transmission distance of the transmission belt and the spatial layout of the mechanism. A conical shaft, a transmission belt, an adjusting mechanism and an output mechanism are installed on a base, the number of the conical shaft is one or two, the adjusting mechanism is used for changing the transmission ratio of the stepless speed change mechanism in the operation process of the stepless speed change mechanism, and the winding direction and the transmission distance of the transmission belt can be changed. Therefore, the mechanism can be applied to different occasions, and the application scene of the mechanism is greatly expanded.