247 results about "Gear ratio" patented technology

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 manual transmission (SG) for a vehicle (100) comprising a first shifting element (A), a second shifting element (B), a first planetary gear set (PS1) with a first sun shaft (SO1), a first ring gear shaft (HR1) and a first carrier shaft (ST1), and a second planetary gear set (PS2) with a second sun shaft (SO2), a second ring gear shaft (HR2) and a second carrier shaft (ST2), wherein the first planetary gear set (PS1) and the second planetary gear set (PS2) are radially nested, wherein the first sun shaft (SO1) and the second carrier shaft (ST2) are rotationally fixed, wherein the first ring gear shaft (HR1) and the second sun shaft (SO2) are rotationally fixed to a stationary component, wherein in the closed state of the first shifting element (A) a first gear with a first ratio is engaged, wherein in the first gear the second ring gear shaft (HR2) is configured as the input and the first carrier shaft (ST1) as the output,• wherein, in the closed state of the second switching element (B), a second gear with a second gear ratio is engaged, wherein in the second gear the second ring gear shaft (HR2) is configured as the input and the second web shaft (ST2) as the output.

This invention relates to the field of hydropower station equipment testing technology, and in particular provides a motion control system based on a programmable automation controller. The system includes a dual-motor drive module, a multi-axis transmission mechanism, and a closed-loop control core module. The dual-motor drive module consists of a rotary mechanism and a Z-axis lifting mechanism. The multi-axis transmission mechanism converts motor power into mechanical motion through a lead screw and nut pair and a gear and rack assembly, ensuring the rigidity and accuracy of power transmission. The closed-loop control core module uses a PAC ADVANCE controller as its core, integrating a Z-axis displacement sensor and a rotary axis angle encoder. It controls the dual motors through pulse direction signals and uses an electronic gear ratio configuration function to convert pulses into actual displacements. In the motion control of a hydropower turbine flow channel inspection robot, this system solves the problems of insufficient accuracy, low flow channel switching efficiency, and high safety risks.

A method for power transmission method includes providing first and second shafts, a gear assembly having first and second gear ratios, and first and second coupling assemblies. The first coupling assembly enabling torque transfer from the first shaft to the second shaft, and the second coupling assembly enabling torque transfer from the first shaft to the second shaft. The speed of the first shaft varies, wherein the deployment of a locking element of the second coupling assembly is based on the speed of the first shaft.

The present invention provides a control device for a human-powered vehicle that can suitably control the transmission. [Solution] The control device for a human-powered vehicle includes a control unit configured to control a transmission that changes the gear ratio, which is the ratio of the wheel rotation speed of the human-powered vehicle's wheels to the rotation speed of the crankshaft of the human-powered vehicle. The control unit is configured to control the transmission to change the gear ratio based on a gear condition relating to at least one of the wheel rotation speed and the crankshaft rotation speed. Even if the gear condition is not met, the control unit is configured to control the transmission to decrease the gear ratio if the human-powered driving force input to the crankshaft is greater than a threshold. The control unit is configured to set the threshold to a first threshold when the state of the human-powered vehicle is a first state, and to set the threshold to a second threshold different from the first threshold when the state of the human-powered vehicle is a second state different from the first state.

A table saw includes a base assembly, a table assembly supported by the base assembly, a saw blade, and a saw assembly supported by the table assembly. The saw assembly includes a motor having a motor output shaft, a power train assembly with an arbor shaft to which the saw blade is fixedly connected, an intermediate shaft, a first gear stage connecting the motor output shaft to the intermediate shaft with a first gear ratio, and a second gear stage connecting the intermediate shaft to the arbor shaft with a second gear ratio that is less than 1.25. The saw blade has a diameter of 254 mm and the saw blade extends by up to 102 mm above the support surface in a maximum cutting height position of the saw assembly.

Vehicle control device (10) comprising an internal combustion engine (11) and an electric motor, wherein the device (10) comprises: a clutch (17) which is arranged in a power transmission path (40) which couples the internal combustion engine (11) and the drive wheels (22); a first driving control device that performs an electric motor drive in which the drive wheels (22) are driven by the electric motor in a state in which the clutch (17) is disengaged to decouple the internal combustion engine (11) from the drive wheels (22) and the internal combustion engine (11) is stopped; a second driving control device that performs a co-rotating drive in which the clutch (17) is engaged, while fuel injection of the internal combustion engine (11) is stopped in a state in which the electric motor drive is performed, and the internal combustion engine (11) is rotated during the drive; an electric motor control device that increases an output torque (Tm1) of the electric motor when the driving mode switches from electric motor driving to pedal-assisted driving; and a transmission mechanism (16) arranged in the power transmission path (40) that couples the internal combustion engine (11) and the drive wheels (22); characterized by a transmission control device (72) that reduces a gear ratio of the transmission mechanism (16) when the driving mode switches from electric motor driving to co-rotating driving, wherein the gear ratio is a ratio of the input shaft speed to the output shaft speed of the transmission mechanism (16).

The present application relates to a mechanical arm with double transmission mechanism, mainly using the concept of simplifying the complex and precise transmission mechanism, so that the previous one needs to be divided into two transmission mechanisms, and the gear ratio of the gear box of each transmission mechanism is different, so that one transmission mechanism can be mainly used for fast driving the mechanical arm body to move vertically, and the other transmission mechanism is mainly used for accurate adjustment, so that the mechanical arm can be accurately moved to the default position. Due to the simplification of the transmission mechanism, the volume of each gear box can be reduced, thereby greatly reducing the overall volume of the mechanical arm.

Hybrid powertrain (10) for starting and propelling a vehicle (8), comprising: a motor (12); a first motor / generator (14); a second motor / generator (16); and a single-stage, widely branched, electrically variable transmission (18) comprising the following: a drive element (52); a stationary element (54); a gear train (44); a torque transmission device (56); a compound planetary gear assembly (20) comprising a ring gear structure (24), a first sun gear element (26-1, 126-1, 226-1, 326-1), a second sun gear element (26-2, 126-2, 226-2, 326-2), a support structure (28), and a double pinion assembly comprising a first pinion gear (30-1, 130-1, 330-1) meshing with the first sun gear element and a second pinion gear (30-2, 130-2, 330-2) meshing with the first pinion gear (30-1, 130-1, 330-1) and the ring gear structure (24); and a highest numerical translation ratio of approximately 4 to 1 and a lowest numerical translation ratio of approximately 0.7 to 1; where: The composite planetary gear arrangement (20) comprises a first node (32-1), a second node (32-2), a third node (32-3) and a fourth node (32-4), wherein the first, second, third and fourth nodes (32-1, 32-2, 32-3, 32-4) have at least a gear ratio of 3 to 1 between the torque transmission device (56) and the output element (52); the second motor / generator (16) is functionally connected via the transmission train (44) to the compound planetary gear assembly (20) at the first node (32-1); the output element (52) is functionally connected to the composite planetary gear assembly (20) at the second node (32-2); the motor (12) is functionally connected to the composite planetary gear assembly (20) at the third node (32-3); the first motor / generator (14) is functionally connected at the fourth node (32-4) to the composite planetary gear assembly (20); The torque transmission device (56) can be engaged to ground the third node (32-3) to the stationary element (54); and each of the first and second motors / generators (14, 16) uses non-rare earth magnets.

One aspect of the invention relates to a method (100) for regulating the engine torque produced by an internal combustion engine of a powertrain provided with a mechanical gearbox, a mechanical clutch and control means, the method (100) being remarkable in that, during the acceleration phase of the powertrain, it comprises the following steps carried out by the control means: • Detecting (101) a desire to shift from a gear ratio N to a higher gear ratio N+n; • Degrading (102) the nominal spark advances of the internal combustion engine so as to reduce the engine torque produced by the internal combustion engine.

The invention relates to a method for performing a downshift in a motor vehicle transmission of a motor vehicle powertrain, wherein, during the downshift, a change from a neutral state of the motor vehicle transmission to a target gear ratio of the motor vehicle transmission is carried out, for which purpose an unsynchronized shift element of the motor vehicle transmission is closed and speed synchronization is performed at the unsynchronized shift element. During the speed synchronization, a transmission input of the motor vehicle transmission is set to a target speed (n). Ziel ) by establishing a torque transmission between the transmission input and a drive motor of the vehicle powertrain via an intermediate disconnect clutch, and by setting the target rotational speed (n) on the part of the drive motor. ZielThe target speed at the gearbox input is specified. Additionally, a target clutch torque (M) is specified for torque transmission in the disconnect clutch. K,soll ) set, whereby the clutch torque (M) K,soll ) depending on a current temperature (T Getr ) of the vehicle transmission is selected.

The application relates to the technical field of new energy automobile power system design and optimization, and discloses an intelligent optimization method for transmission speed ratio of an electric truck, which comprises the following steps: 1.1. According to the whole vehicle parameters, performance indexes and working condition load characteristics of the electric truck, the power, torque and rotating speed of the driving motor are matched and parameter configured; 1.2. Based on the whole vehicle energy consumption characteristics and the endurance mileage demand, the energy, capacity and voltage parameters of the power battery are optimized and configured; 1.3. The constraint conditions that the transmission speed ratio needs to meet are analyzed, including the maximum vehicle speed, climbing ability and acceleration performance. The transmission speed ratio of the electric truck is optimized through a multi-objective evolutionary algorithm improved by a deep Q network, the power performance and economic performance indexes can be comprehensively considered, and multi-objective optimization of the transmission speed ratio parameters is realized. Compared with the traditional optimization method, the application can not only effectively balance the power performance indexes such as the acceleration time and the climbing ability, but also significantly reduce the energy consumption per 100 kilometers, and improve the economy of the whole vehicle.

Bottom bracket housing (1) for a bicycle (4) driven exclusively by muscle power via pedals (2) on a bottom bracket shaft (3), comprising a first housing area (6) for receiving the bottom bracket shaft (3) and a bottom bracket gearbox (5) connected to a drive wheel and a second housing area (7) for receiving a power supply for an electrical switching actuator for realizing different gear ratios in the bottom bracket gearbox (5), characterized in that the power supply comprises at least one energy storage device (8) with charging electronics (9) and a generator (10) for recuperation.

An electric axle and electric axle product line. The electric axle includes, in one example, a multi-speed gearbox assembly rotationally coupled to a first electric machine and including a first shaft with a first clutch positioned coaxial thereto and a second shaft with a second clutch positioned coaxial thereto. In the multi-speed gearbox assembly, the first clutch and the second clutch are parallel to one another and configured to alter the unit's operating gear ratio.

The present invention provides a control device for a human-powered vehicle that can suitably control the transmission. [Solution] A human-powered vehicle includes a transmission configured to change a gear ratio, which is the ratio of the rotational speed of the wheels of the human-powered vehicle to the rotational speed of the crankshaft of the human-powered vehicle. A control device for the human-powered vehicle includes a control unit configured to control the transmission, the control unit configured to control the transmission to change the gear ratio based on gear shifting conditions, and when the gear shifting conditions and gear shift suppression conditions are met, the control unit is configured to control the transmission in a first control state that suppresses gear shifts that increase the gear ratio, and in the first control state, the control unit is configured to change the degree to which gear shifts that increase the gear ratio are suppressed based on history information of human-powered driving force input to the crankshaft.

This invention discloses a spinless multi-roller cone continuously variable transmission (CVT) unit, aiming to provide a CVT unit that avoids spin efficiency loss within its gear ratio range, is easy to manufacture, has a long lifespan, and provides high torque. Its key technical features are: the transmission unit consists of a spindle, input sleeve, output sleeve, input roller, output roller, force-transmitting cone, cone mounting shaft, and speed-regulating sleeve. Power is input through the input sleeve, passing sequentially through the input roller, force-transmitting cone, and output roller, and finally output through the output sleeve. A speed-regulating sleeve is arranged on the spindle, hinged to one end of the cone mounting shaft. During speed adjustment, the orientation of the force-transmitting roller is changed by moving the speed-regulating sleeve, and other traction elements follow and maintain contact. The working surface of the force-transmitting cone is a standard conical surface, while the input and output rollers are convex curved surfaces. This invention can be used to replace the transmission unit in a traction-type CVT, enabling the transmission to achieve spinless, efficient transmission with excellent overall performance.

A washing machine drive system is provided. A washing machine drive system according to an aspect of the present disclosure includes a housing, a motor stator coupled to the housing, a rotor facing the motor stator, an output shaft bearing-coupled to the housing, a planetary gear set coupled to the rotor and spline-coupled to an outer peripheral surface of the output shaft, a clutch stator coupled to the motor stator, and a clutch actuator spline-coupled to an outer peripheral surface of the planetary gear set so as to be vertically movable and facing the clutch stator, in which the clutch stator includes first to third coils arranged in parallel in a vertical direction, the clutch actuator is fixed to the rotor and transmits rotational force of the rotor to the output shaft at a 1:1 ratio when current is supplied to the first coil, the clutch actuator is fixed to the clutch stator, reduces the rotational force of the rotor at a gear ratio of n:1, and transmits the reduced rotational force to the output shaft when current is supplied to the third coil, and the clutch actuator is disengaged from the rotor or the clutch stator when current is supplied to the second coil.

A method for switching a gear ratio of a switchable gear mechanism of a vehicle, which includes an electric motor for driving the vehicle, includes: generating a motor torque with the electric motor; determining an upcoming gear change; reducing the amount of the generated motor torque depending on the determined gear change; and changing the gear ratio of the switchable gear mechanism during a predetermined timespan according to the reduction in the amount of the generated motor torque. At least one motor torque pulse is generated by the electric motor during the predetermined timespan.

The present disclosure provides a co-rotating spiral compressor comprising a housing and a first spiral disk, a second spiral disk and a drive shaft rotatably arranged within the housing, wherein the first spiral disk is configured to rotate about a first axis of rotation and comprises an axially projecting first spiral body and a circumferentially arranged first toothed ring; wherein the second spiral disk is configured to rotate about a second axis of rotation and comprises an axially projecting second spiral body and a circumferentially arranged second toothed ring, wherein the second spiral body engages with the first spiral body and the second axis of rotation is parallel and offset from the first axis of rotation;and wherein the drive shaft is provided with a first gear and a second gear which are attached to it and are coaxial thereto, wherein the first gear is in mesh with the first gear ring, wherein the second gear is in mesh with the second gear ring and the gear ratio of the first gear ring to the first gear is equal to the gear ratio of the second gear ring to the second gear.

The application discloses a clutch steering engine gear ratio transmission torque design method and belongs to the technical field of clutch steering engines. The method comprises the following steps: designing a torque curve distribution of the clutch steering engine, wherein the torque curve comprises a gear ratio transmission conversion clutch torque curve, a locked-rotor torque curve, a gear set clutch protection torque curve and a gear set failure torque curve; based on the torque curve distribution, determining a conversion clutch torque point A, a protection clutch torque point B, a gear damage torque point C and a minimum conversion clutch torque point D; designing a steering engine transmission ratio meeting a speed requirement of the clutch steering engine; and under the condition of meeting the speed requirement, respectively designing a range of the conversion clutch torque, a range of the protection clutch torque and a range of the gear damage torque. Compared with the prior art, the application has the beneficial effects that gear set safety and reliability, quick response and torque instantaneous burst functions are taken into account, user application requirements are effectively met, and manufacturing costs are greatly reduced.

A turbine unit (674) captures energy from a fluid flow (244). It includes at least one turbine (100) arranged along a turbine stack axis (454), each turbine (100) having a central portion (102) and blades (104) extending radially and rotating about the central portion (102). Each blade (104) includes at least one airfoil (116) movable between open and closed configurations; in the closed configuration, the airfoil forms a surface oblique to the fluid flow (244) to convert kinetic energy into rotation. A gearbox assembly (979) coupled to the turbine (100) converts rotation into mechanical power and includes an input shaft, gears responsive to a first control signal to vary gear ratio, and an output shaft. At least one sensor (983) generates operational data used by a control system (981). A fluid-flow control element (666) near the turbine (100) regulates fluid flow (244) in response to a second control signal.

The invention relates to a method for changing a transmission ratio in a light vehicle (1) under load, comprising the steps: S1: Recording a moment profile (11) of a moment applied by a driver; S2: Determining the rotational speed of an engine (6) of the light vehicle (1); S3: Predicting a time (14) and / or an expected rotation angle (15) of a pedal crank (3) of the light vehicle (1) at which a torque minimum (13) of the torque applied by the rider is expected based on the recorded torque profile (11) and the recorded rotational speed; and S4: Changing a translation ratio based on the predicted time (14) and / or expected rotation angle (15). Furthermore, the invention relates to a computer program product and a light vehicle (1).

A modular shifting system is provided. The modular shifting system comprises a transmission including an input shaft and an output shaft, a transmission housing, gear trains accommodated in the transmission housing and constituting at least two shiftable gear ratios for establishing a transmission ratio between the output shaft and the input shaft, and a shift device for shifting between the at least two gear ratios. The shift device is detachably attached to the transmission housing. The shift device is one of an electrically actuated shift device and a pneumatically actuated shift device. The modular shifting system is configured such that the electrically actuated shift device is interchangeable with the pneumatically actuated shift device and vice versa.

This invention proposes a design method for a gear transmission system of a floor grinding machine, comprising the following steps: Step 1: Determine the diameter, grinding width, center distance, and cross length of the grinding disc, and calculate the grinding parameters of the grinding machine through geometric relationships; Step 2: Determine the arrangement of the input and output gears of the gear transmission system required for the grinding discs based on the number of grinding discs and the center distance; Step 3: Design the lower gear ratio, the number of teeth on the input gear, and the number of teeth on the output gear of the gear transmission system to match the power transmission requirements; Step 4: Design the gear transmission system according to the structure type of the grinding machine; This invention is applicable to both circular and square floor grinding machines. By systematically calculating the number of motors and gear transmission parameters, it can achieve a comprehensive match between the grinding disc layout and the gear transmission system, thereby improving grinding uniformity, transmission stability, and equipment structural compactness.

The utility model discloses a planetary reducer special for robot joints, and relates to the technical field of reducers. Comprising an input end cover, a mounting disc, a shell, a coupler, an input device, a sun gear, a planet carrier, a planet gear, an inner gear ring, an output flange and a cover plate, the input end cover is fixed to the shell through the mounting disc, the coupler is arranged in the shell and connected with the input device, and the sun gear is arranged at the other end of the input device and meshed with the planet gear; the planetary gear is meshed with the inner gear rings and arranged in a planetary carrier, the output end of the planetary carrier is connected with an output flange, a cover plate is arranged outside the output flange, and the cover plate is fixed to the inner gear ring at one end. The special gear ratio is adopted, the speed ratio of primary planetary speed reduction is increased to 11, meanwhile, the planetary gear is made of PEEK engineering plastics, and the weight of the speed reducer is greatly reduced.

A method for controlling an electric bicycle comprises: detecting a pedal speed and a wheel speed; generating a wheel torque command by applying a wheel speed parameter to a difference between a wheel speed command generated by multiplying the pedal speed by a gear ratio and the wheel speed; generating a pedal torque command by applying a pedal speed parameter to the difference between the wheel speed command and the wheel speed; controlling a motor based on the wheel torque command; and controlling a generator based on the pedal torque command.

To provide an electric vehicle that allows drivers to experience operating a manual transmission vehicle while simultaneously maintaining ease of starting. [Solution] This disclosure relates to an electric vehicle having a manual mode for controlling an electric motor to simulate the operation of a virtual vehicle equipped with a virtual engine. The electric vehicle includes a transmission that changes the gear ratio between the electric motor and the drive wheels, a clutch provided between the electric motor and the transmission, a clutch operating device, and a control device that is communicatively connected to the clutch and the clutch operating device. In manual mode, the control device controls the clutch in response to instructions from the clutch operating device. The control device also controls the clutch independently of instructions from the clutch operating device to start the electric vehicle.

This technology provides a way to reduce the range of change in the actuator's natural frequency when adjusting the output compliance of the actuator. [Solution] An actuator comprising a prime mover 12, a transmission 14 that receives the rotation output from the prime mover 12, changes the speed of that rotation and outputs it to drive a driven device 18, and can change the gear ratio, which is the ratio of the output rotation speed to the input rotation speed, and an input-side elastic element 32 provided on a power transmission path 30 from the output shaft 20 of the prime mover 12 to the input shaft 22 of the transmission 14.

Device (40; 90) for determining the cause of an abnormality, which is used in a vehicle (VC; VC(1)) with an electromagnetic actuator (28), comprising: a storage device (46; 46, 96) configured to store characteristic map data, which are data for defining a characteristic map, wherein the characteristic map has a current variable (ΔI), which is a variable indicating a current actually flowing in the electromagnetic actuator (28), as an input variable, and a cause variable, which is a variable indicating the cause of an abnormality of an on-board unit having the electromagnetic actuator (28), as an output variable; and an implementing device (42, 44; 92, 94) which is configured to perform a detection process (S46, S48; S100) for detecting a value of the input variable based on a detection value from a sensor installed in the vehicle (VC; VC(1)) and a calculation process (S52) for calculating a value of the output variable by inputting the value of the input variable into the map, wherein the on-board unit is a gear-shifting device (26) that changes a gear ratio between a rotational speed of a drive shaft of a drive machine (VC; VC(1)) installed in the vehicle and a rotational speed of drive wheels; the electromagnetic actuator (28) comprises a solenoid valve (28a) of the gearshift device (26); and the current variable (ΔI), which is the input variable, contains a variable that indicates a current flowing in the solenoid valve (28a) during one switching period of the gear ratio in the gear shifting device (26).

A transmission control method for a vehicle, comprising: determining a target transmission ratio from the rotational speed of a transmission input shaft (22) to the rotational speed of a transmission output shaft (24) in response to a signal in a first state, independent of any accelerator pedal position and dependent on a vehicle speed and a drive axle torque request when the axle torque request is valid, and determining the target transmission ratio in response to a signal in a second state based on the vehicle speed and an accelerator pedal position when the axle torque is not valid;controlling the opening of a first valve based on the desired gear ratio, wherein the first valve controls a transmission fluid flow to a first pulley actuator (34) and wherein the first pulley actuator (34) is connected to the transmission input shaft (22) of a continuously variable transmission (CVT) (14) and expands and contracts based on a first pressure of the transmission fluid applied to the first pulley actuator (34);and controlling the opening of a second valve based on the desired gear ratio, wherein the second valve controls a transmission fluid flow to the second pulley actuator (36), and wherein the second pulley actuator (36) is connected to the transmission output shaft (24) of the CVT (14) and expands and contracts based on a second pressure of the transmission fluid applied to the second pulley actuator (36), and wherein one of (i) a belt (38) and (ii) a chain (38) surrounds the first and second pulley actuators (34, 36).