780 results about "Continuously variable transmission" patented technology

An off-road vehicle includes a powertrain assembly having an engine and a steel belt continuously variable transmission. Portions of the powertrain assembly are supported at a rear portion of the vehicle and are positioned relative to other components of the vehicle also supported at the rear portion of the vehicle. The vehicle also is configured for various operating modes.

A snowmobile includes a frame, a driver seat supported by the frame, a left footrest and a right footrest, a rear suspension assembly connected to the frame, an endless track supported by the rear suspension assembly, a motor supported by the frame and operatively connected to the endless track, a drive shaft, a driven shaft operatively connected to the endless track, and a continuously variable transmission (CVT) operatively connecting the drive shaft to the endless track. The CVT comprises a drive pulley being operatively connected to the motor via the drive shaft, a driven pulley being operatively connected to the endless track by the driven shaft, a belt operatively connecting the drive pulley to the driven pulley, and a CVT housing enclosing the drive pulley, the driven pulley and the belt. The CVT housing defines an air inlet and air outlets including a first and a second air outlet.

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 invention discloses a dynamic matrix and graph theory model construction method for an HMCVT. The dynamic matrix and graph theory model construction method comprises the following steps that S1, a layered topological graph of a hydraulic mechanical continuously variable transmission is established; s2, constructing an adjacent matrix of the layered topological graph as a feature matrix; s3, determining a transmission constraint condition and a structure constraint condition of the hydraulic mechanical continuously variable transmission; s4, constructing and simplifying a rotating speed matrix equation, performing isomorphic identification through the simplified rotating speed matrix equation, and finding out a graph theory model of the HMCVT with the same transmission mechanism; and S5, constructing a basic torque matrix equation to obtain torque state matrix equations under different connection modes, and reflecting the dynamic performance of the graph theory model through the rotating speed matrix equation and the torque state matrix equations. According to the method, the conversion of a computer programming language is facilitated, a powerful theoretical reference is provided for realizing structure digitization, the time for designing the HMCVT structure can be greatly saved, and the design complexity is reduced.

The invention relates to the field of electromagnetic vibration damping devices for changing fluid viscosity and adjusting damping properties, in particular to a bidirectional adjustable magneto-rheological inerter damper. The bidirectional adjustable magneto-rheological inerter damper comprises a first terminal (11), a second terminal (12), a first end plate (21) and a second end plate (22), and is characterized by further comprising a screw (3), screw balls (41), channel balls (42), an input ring (51), an output ring (52), a continuously variable transmission (6) and a controllable damping system (7), and the continuously variable transmission (6) comprises a stator (61), an idle wheel (62), a shell (65), traction fluid (66) and the like. And the controllable damping system (7) comprises a fixed pipe (71), a fixed pipe rotor (72), a rotor bearing (73), a flywheel (76), an electromagnetic coil group (77), a controller (78) and a direct-current power supply (79). Space is saved, and the vibration control performance is good.

The invention relates to the field of shock absorber detection, in particular to a detection device for automobile shock absorber production. Comprising a test bench, a driving motor and a continuously variable transmission are fixedly installed on the test bench, a first delivery wheel and a test roller which are symmetrically distributed are installed on the test bench, the output end of the continuously variable transmission is in transmission connection with the first delivery wheel and a second delivery wheel through a belt, and a limiting shell is fixedly connected to the test bench. The limiting shell is slidably connected with a first limiting block and a limiting piston rod, and an oil hydraulic cylinder is fixedly connected to the side, close to the driving motor, of the testing table. The transmission ratio of the continuously variable transmission is changed through cooperation of the first limiting block, the limiting piston rod and the oil hydraulic cylinder, when the piston rod makes contact with the first limiting block, the delivery speed of the piston rod is correspondingly decreased, and when the piston rod does not make contact with the first limiting block, the delivery speed of the piston rod is correspondingly increased; the connection efficiency of the detection process of the two piston rods is improved.

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 utility model relates to a transmission system of a vehicle, and provides a stepless speed change transmission system of an agricultural non-road vehicle in order to solve the problems that the cost is high and the stability is reduced due to the fact that the number of clutches adopted by an existing stepless speed change transmission system is large. The gear shifting mechanism comprises a first parallel shaft assembly, a second parallel shaft assembly, a third parallel shaft assembly, a fourth parallel shaft assembly, a fifth parallel shaft assembly, a sixth parallel shaft assembly, a seventh parallel shaft assembly, an eighth parallel shaft assembly, a ninth parallel shaft assembly, a tenth parallel shaft assembly, a first gear shifting clutch and a second gear shifting clutch. The system comprises a hydrostatic system, a first-gear synchronizer, a second-gear synchronizer, a third-gear synchronizer and a reverse-gear synchronizer. The hydraulic system has three forward gears and one reverse gear, and continuous change of the rotating speed of the output shaft and continuous output of power can be realized by adjusting the swing angle change of the variable pump swash plate in the hydrostatic system, the switching state of the synchronizer and the combination state of the clutch.

A system and method of evaluating a continuously variable transmission (CVT) on a vehicle includes positioning a vehicle having a CVT on a test stand, where the test stand comprises rollers for receiving wheel assemblies of the vehicle, and with the vehicle further including a drivetrain and an electronic system comprising a transmission controller. The vehicle is operated on the test stand whereby wheel assemblies of the vehicle are rotated via the drivetrain of the vehicle. A computer acquires data from the electronic system of the vehicle while the vehicle is being operated on the test stand with the data used to determine whether the CVT is operating acceptably based on the acquired data.

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 invention relates to an electric drill speed reduction structure and an electric drill, and provides the electric drill speed reduction structure which comprises a wheel type continuously variable transmission and a cycloidal pin wheel speed reducer. The invention further provides an electric drill. The electric drill is provided with the electric drill speed reduction structure. The speed reduction structure of the electric drill comprises a wheel type continuously variable transmission and a cycloidal pin gear speed reducer, has the characteristics of wide speed regulation range, stepless speed regulation, balanced operation, low noise and the like, and simultaneously overcomes the problems that lubricating grease of a gear box is easy to flow out of a gear shifting hole and the gear shifting is blocked in the traditional structure; the electric drill provided with the electric drill speed reduction structure is far superior to a traditional gear box type electric hand drill in the aspects of rotating speed, torsion and impact rate in a screw driver mode, and due to the fact that stepless speed regulation can be achieved, no matter how power is needed, a user can always enable a power motor to work under the working condition of the maximum power or the maximum energy efficiency by adjusting the speed ratio of speed reduction all the time.

A continuously variable transmission includes a primary shaft, a secondary shaft, a primary pulley, a secondary pulley, a first power transmission member, a primary sprocket, a secondary sprocket, a second power transmission member, and a power transmission switch. The first power transmission member has a loop shape and is wrapped around the primary pulley and the secondary pulley. The primary sprocket is disposed on the primary shaft. The secondary sprocket is disposed on the secondary shaft. The second power transmission member has a loop shape and is wrapped around the primary sprocket and the secondary sprocket. The power transmission switch disables power transmission by the second power transmission member when the first power transmission member is in a normal condition and enables the power transmission by the second power transmission member when the first power transmission member is in an abnormal condition.

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.

A continuously variable transmission includes, in a case: a drive pulley and a driven pulley each including a fixed-side pulley half and a movable-side pulley half configured to move to the fixed-side pulley half; a belt including a plurality of elements and a plurality of rings wound around the drive pulley and the driven pulley; a parking gear provided to the fixed-side pulley half of the driven pulley; and a parking pawl configured to be fitted to the parking gear, the continuously variable transmission transmitting a driving force to a wheel while changing a transmission ratio by changing groove widths of the drive pulley and the driven pulley, wherein the case includes an annular rib integrally molded with the case in a manner surrounding an outer periphery of the parking gear except for a position intersecting a swing trajectory of the parking pawl and a predetermined position.

The invention relates to a continuously variable transmission (CVT) comprising an input shaft, an output shaft, an intermediate shaft, a variator transmission, a hydrostatic transmission, a housing, and a bearing plate, wherein the hydrostatic transmission is arranged geometrically parallel to the variator transmission in a side view in the installed position, and the power flow between the hydrostatic transmission and the variator transmission is divisible, wherein the output shaft is offset horizontally and vertically to the input shaft in the axial direction, in the installed position, wherein the housing is one-piece and open on one side, and the components within the CVT are held in the housing by the bearing plate in the assembled state, wherein the housing and / or the bearing plate have flat surfaces on their outer sides designed to attach module components to an outer side of the CVT.

The utility model discloses an all-terrain vehicle and a continuously variable transmission thereof, 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 main sliding wheel assembly and a fixed wheel assembly, and the main sliding wheel assembly is slidably connected with the main shaft; the fixed wheel assembly is arranged on the main shaft and is fixedly connected with the main shaft; the thrust disc assembly is arranged on the main shaft in a sleeving mode, the thrust disc assembly comprises a thrust disc body and a connecting part, and the thrust disc body is connected with a spline of the main shaft through the connecting part; the thrust disc body is made of a first material, the connecting part is made of a second material, and the thrust disc body and the connecting part are integrally formed. According to the arrangement mode, the overall strength of the continuously variable transmission can be effectively improved, and meanwhile kinetic energy loss caused by transmission of parts can be reduced.

The invention discloses a power split type hybrid power tractor control method, system, equipment and medium, and relates to the technical field of mechanical equipment.The system comprises a continuously variable transmission, a power device, an auxiliary device and a transmission device, and the power device, the auxiliary device and the transmission device are connected with the continuously variable transmission; the continuously variable transmission comprises a planetary gear set, a first motor and a second motor; the power device comprises an internal combustion engine and a first clutch. The auxiliary device comprises a hydraulic pump, a PTO device and a third clutch. The transmission device comprises a second clutch and a transmission shaft. The planetary gear set and the dual-motor design of the continuously variable transmission are combined with the internal combustion engine and the clutch in the power device, so that the engine can always run in a high-efficiency interval, the fuel economy is remarkably improved, and the energy consumption is reduced.

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).

The present invention belongs to the technical field of transmission, and relates to a continuously variable transmission transmission device in which the speed regulating centrifugal force does not act on a cone disc, comprising a one-shaft cone disc unit, a two-shaft cone disc unit and an annular transmission member, and also comprising a thrust unit and a centrifugal speed regulating unit; the centrifugal speed regulating unit comprises a dynamic centrifugal disc, a fixed centrifugal disc, a centrifugal body and a first elastic component of a shaft, the dynamic centrifugal disc is butted against the one-shaft dynamic cone disc, the first elastic component of the one shaft presses against the end face of the dynamic centrifugal disc, and provides a thrust to the dynamic centrifugal disc in the direction of the one-shaft dynamic cone disc; the two end faces of the fixed centrifugal disc and the dynamic centrifugal disc are coaxially arranged opposite to each other, and at least one end face is provided with a centrifugal ramp groove; the centrifugal body is clamped in the centrifugal ramp groove, and under the action of the rotating centrifugal force, the centrifugal body climbs along the centrifugal ramp groove and compresses the one-shaft first elastic component and pushes the dynamic centrifugal disc to make an axial movement away from the fixed centrifugal disc, and at the same time provides an axial movement space for the one-shaft dynamic cone disc to move synchronously and in the same direction as the dynamic centrifugal disc.

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.

The invention relates to the technical field of agricultural machinery, in particular to an EMCVT hybrid power transmission system and a control method.The structure of the EMCVT hybrid power transmission system comprises an engine connected with the first end of a first main shaft; the first motor is in transmission connection with the first main shaft; the planet row is in transmission connection with the first main shaft; the second motor is in transmission connection with the planet row; the power gear shifting part is in transmission connection with the planet row; the central transmission part is in transmission connection with the power gear shifting part; and the walking part is in transmission connection with the central transmission part. By means of the EMCVT hybrid power transmission system and the control method, the problems that an existing hydraulic mechanical continuously variable transmission technology is high in overall system complexity, and a tractor is difficult to apply can be solved.

The invention relates to the technical field of transmissions, and discloses a continuously variable transmission which comprises a first wheel assembly with a first blade and a second wheel assembly with a second blade, and the first blade and the second blade are coaxially arranged and meshed with each other in a nested mode. At least one of the first wheel assembly and the second wheel assembly can be adjusted to move axially relative to the other, so that the first blades and the second blades are in transmission joint at different radial positions. According to the continuously variable transmission, one of the first wheel assembly and the second wheel assembly is axially moved, so that the transmission joint position between the first blade and the second blade is changed, and the ratio of the power input force arm to the power output force arm of the first wheel assembly to the power output force arm of the second wheel assembly is changed; finally, the output speed of the continuously variable transmission is changed, and continuously variable transmission is achieved. Meanwhile, the continuously variable transmission further has the advantages of being small and exquisite in structure, low in manufacturing and maintenance cost and wide in application range.

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.