707 results about "Gear ratio" patented technology

The invention relates to the technical field of laser cutting machining, in particular to a cutting device for forge piece machining, which comprises a worktable, a transmission rotating shaft for conveying pipes is mounted at the upper end of the worktable, a first motor is mounted at the rear end of the worktable, and a cleaning mechanism for pretreating the pipes is mounted at the front end of the worktable; a bevel conveying frame is fixedly connected to the rear end of the workbench, a chamfering mechanism used for polishing the round pipe is installed on the inner side of the bevel conveying frame, through the synergistic effect of a heating plate and a friction plate, the heating plate is attached to the curved surface of the pipe in a self-adaptive mode through a second spring, and an oxide layer is heated to the softening temperature; through cooperation with circumferential grinding of a silicon carbide friction plate, the removal rate can reach 98% or above, the problem of scrap residue in traditional dry grinding is avoided, and it is ensured that the two sets of rotating plates clamp the pipe at the synchronous rotating speed through the rotating plate synchronous closing technology and the design of the 1.2-time tooth number ratio of a fourth gear and a fifth gear.

A computer system has processing circuitry to selectively operate the powertrain system in at least a freewheeling mode, in which an output shaft of the engine is non-rotating, and the engine is disconnected from the one or more drive wheels. The processing circuitry is further configured to: determine an opportunity for the freewheeling mode by predicting a feasibility of restarting the engine along an intended route by using a controllable clutch. Predicting the feasibility of restarting the engine by using the controllable clutch includes determining fulfillment of any one of a first restarting condition and a second restarting condition. Determining fulfillment of the first restarting condition includes comparing current total weight of the vehicle with a threshold value indicative of a minimum total weight for avoiding excessive braking of the vehicle during restarting at a high friction road condition with a given total gear ratio. Determining fulfillment of the second restarting condition includes comparing a current drive axle load with a corresponding threshold value indicative of a minimum drive axle load on a drive axle for avoiding excessive wheel slip during restarting at a low friction road condition with a given total gear ratio. The powertrain system is controlled into the freewheeling mode upon the fulfillment of any one of the first restarting condition and the second restarting condition.

An electrified powertrain for an electrified vehicle includes a first electric drive module (EDM), a second EDM and a controller. The first EDM includes a first electric motor. A first gearbox transfers first drive torque from the first EDM to drive first drive wheels. The second EDM includes a second electric motor. A second gearbox transfers second drive torque from the second EDM to drive second drive wheels. The second gearbox has first and second clutches that provide two distinct gear ratios. The controller operates the electrified powertrain in (i) a normal drive mode wherein drive torque is commanded from the first and second electric motors, and a (ii) neutral drive mode wherein the clutches are commanded to an open position whereby the second drive torque is disconnected from the second drive wheels and drive torque is commanded from only the first EDM.

A drivetrain for a mobility vehicle includes: an electric motor and a gearshift device having a plurality of gear ratios between a first gear ratio and an upper gear ratio, the electric motor being connected to at least one output sprocket of the gear shift device.

A digital power take-off system includes an input shaft and an output shaft connected to a planetary gear. An actuator is mechanically coupled to the planetary gear to mechanically control a rotational speed of the output shaft. An output shaft sensor detects the output shaft rotational speed. Controller circuitry receives a desired output shaft rotational speed, receives the output shaft rotational speed from the output shaft sensor, and determines a difference between the rotational speeds. The controller circuitry outputs an operating parameter, based on the determined difference, to the actuator such that the actuator modifies a gear ratio of the planetary gear to maintain the desired output shaft rotational speed over a range of input shaft rotational speeds.

Systems, methods, and devices are provided for a turbine driven pump gearbox. A turbine engine may drive a primary shaft having gears. The gears may selectably engage with gears of a secondary shaft that drives a machine (e.g., pump). By changing which gears of the primary shaft engage with which gears of the secondary shaft, a gear ratio may be changed. A power takeoff device (e.g., a generator) may be connected to the primary shaft and may be operated in reverse as a motor to rotate, slow, stop, and / or reverse rotation of the primary shaft. Brakes may be associated with one or more of the primary and secondary shafts. The power takeoff device and one or more of the brakes may be controlled to shift engagement of the shafts between different positions, changing the gear ratio and / or disengaging the shafts from each other.

An electric drive assembly for operation with a work vehicle component using an SAE standard hydraulic pump / motor mount includes an electric machine with a shaft and a mounting flange. An adapter housing defines an interior space between a component mounting flange and an electric machine mounting flange. The electric machine mounting flange is sized and configured to mate with the electric machine mounting flange. The component mounting flange has a bolt hole pattern and mounting pad that are complementary in size and configuration to those of the SAE standard hydraulic pump / motor mount. A gear set, located at least partially within the interior of the adapter housing, is configured to effect a change in gear ratio and transmit power between the electric machine shaft and a drive shaft.

A transmission arrangement for a drivetrain of an agricultural towing vehicle includes an input shaft, an output shaft, a transmission device, a transmission unit, and an electric machine. The transmission device includes a mechanical transmission branch and a variable transmission branch with a magnetic-electrical epicyclic transmission stage having an internal rotor, an external stator, and an interposed rotatable magnetic modulation ring being rotationally conjointly connectable to a clutch drive shaft. The transmission unit is arranged downstream in the power flow and includes a first clutch and a second clutch connected to the clutch drive shaft and at least four gear sets for establishing at least four gear ratio stages. The electric machine is coupled to the input shaft and configured to transmit electrical power to the external stator, which is configured to rotate the modulation ring.

A hybrid transmission system with a multi-speed gearbox. The multi-speed gearbox is configured to rotationally couple a prime mover and an electric machine to different gear ratios during a hybrid drive mode. The multi-speed gearbox includes an electric drive interface gear positioned coaxial to a first primary shaft and a second primary shaft and idly mounted, free to spin, to the second primary shaft and an output shaft that includes an output shaft gear which is fixedly coupled thereto meshes with a gear on a secondary shaft.

The invention relates to the technical field of kitchen appliance control, and discloses a chef machine and a control method thereof. According to the method, a stirring mode instruction is received through an operation interface, and a stirring mode comprises a preset non-constant-speed double-linkage mode and corresponds to a plurality of transmission gear ratio parameters; according to the transmission gear ratio parameter, determining a target rotating speed ratio of a driving motor for driving a stirring head to a stirring barrel base; if it is detected that the stirring head and the upper transmission shaft are in a connected state and the stirring barrel is fixed, calculating the output rotating speed and torque parameters of the driving motor based on the target rotating speed ratio; generating a driving instruction according to the output rotating speed and the torque parameter and sending to a driving motor; in the running process of the driving motor, motor current and rotating speed sensor data are collected in real time, if it is detected that load torque exceeds a preset safety threshold value, motor output power is reduced or running is stopped, and overload alarm is triggered; if it is detected that the rotating buckle of the stirring barrel base and the machine base is loosened, the driving motor and the electromagnetic heating are stopped.

A battery electric vehicle according to an embodiment of the present disclosure includes a pseudo gear shift operation member that imitates an operation member used in gear shift operation of a manual transmission internal combustion engine vehicle in addition to a driving operation member used in driving thereof. A control apparatus that controls battery electric vehicle is configured to control the operation of the battery electric vehicle with respect to operation of the driving operation member in accordance with an operation state of the pseudo gear shift operation member. The control apparatus executes deceleration control that autonomously decelerates an own vehicle when the own vehicle enters a curved road. The control apparatus encourages a driver to operate the pseudo gear shift operation member in a manner similar to that when a gear ratio of the manual transmission internal combustion engine vehicle is increased when the deceleration control is executed.

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.

The invention provides a motor driving device and a driving method thereof. The motor controller determines a switching condition according to the treading torque and the gear ratio, and switches a mode for controlling the motor to a magnetic field steering control mode, a six-step square wave control mode or a simulation six-step square wave control mode according to whether the rotating speed of the motor meets the switching condition or not.

To provide a control device for a human-powered vehicle that can contribute to appropriate running of the human-powered vehicle.SOLUTION: A control device for a human-powered vehicle comprises a control part that is configured to control at least one of a speed change gear and a motor. The control part is configured to switch a control state from a first control state to a second control state, when acceleration of the human-powered vehicle is in a predetermined acceleration range and a driving wheel rotation speed is in a predetermined rotation speed range. The second control state, which is different from the first control state, includes at least one of a speed change suppression control state in which the control part controls the speed change gear so that a change gear ratio is suppressed from changing and an assist change control state in which the control part controls the motor so that output of the motor is changed.SELECTED DRAWING: Figure 2

A steering device according to the present invention includes: a steering input device including a reaction force actuator that applies a steering reaction force to a steering operation input member; and a control device including a steering gear ratio change unit that changes a steering gear ratio in accordance with a vehicle speed, a reaction force actuator control unit that controls an output amount of the reaction force actuator in accordance with an operation angular velocity of the steering operation input member, and a reaction force actuator output amount change unit that changes, based on the steering gear ratio, the output amount of the reaction force actuator. This makes it possible to set an appropriate steering reaction force applied to the steering operation input member, thereby stably reducing the operational burden on a driver.

The invention 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 that torque curve distribution of the clutch steering engine is designed, and torque curves comprise 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, 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 are determined; the steering engine transmission ratio meeting the speed requirement of the clutch steering engine is designed; under the condition that the speed requirement is met, the clutch torque changing range, the clutch protection torque range and the gear damage torque range are designed respectively. Compared with the prior art, the gear set has the beneficial effects that the functions of safety, reliability, quick response and torque instant explosion of the gear set are considered, the application requirement of a user is effectively met, and meanwhile the manufacturing cost is greatly reduced.

The invention relates to the technical field of air conditioner wind direction control, and discloses an energy-saving air conditioner wind direction control device which comprises a shell, an adjusting frame, an air collecting box and a support installed on the shell, a plurality of air outlets are formed in the upper portion of the shell, a telescopic pipe is installed in each air outlet, a first shutter is installed at the front end of each telescopic pipe, and a second shutter is installed at the rear end of each telescopic pipe. An axial screw and a transmission shaft driven by a second motor are rotatably mounted on the support, a torsion spring is arranged at the rotational joint of the axial screw and the support, a shaft sleeve is in linkage with the transmission shaft, three half-tooth gears with the same radius are mounted on the shaft sleeve, and the gear ratio of the three half-tooth gears is 8: 9: 10. When wide-angle air supply is needed, meshing of the large-tooth-number half-tooth gear can be switched to increase the rotation amplitude of the axial screw, when a mute mode is needed, meshing of the small-tooth-number gear can be switched to reduce the swing frequency, and self-adaptive adjustment of the functional belt under different air speed and air direction requirements is achieved through the precise control mode.

A turbine engine includes: a turbomachine having a compressor section, a combustion section, and a turbine section arranged in serial flow order, the compressor section having a HPC defining a HPC exit area (AHPCExit) in square inches, the turbine section having a LPT; a fan; a gearbox; and a DECP 0.10-0.50, where DECP equals 10*D / GR / NLPT2 / NHPC, D is the fan blade tip diameter, GR is the gear ratio of the gearbox, NLPT is the stage count of the LPT, and NHPC is the stage count of the HPC. The gas turbine engine defines a redline exhaust gas temperature (EGT) in degrees Celsius, a total sea level static thrust output (FnTotal) in pounds, and a corrected specific thrust, wherein the corrected specific thrust is greater than or equal to 42 and less than or equal to 90, the corrected specific determined as follows: FnTotal×EGT / (AHPCExit2×1000).

The invention discloses a self-adaptive riding speed control system and method, and relates to the technical field of vehicle control, the system collects motion state data of a riding vehicle in real time through a sensor group installed on the riding vehicle, and after preprocessing, a vehicle attitude data set and a riding condition data set are formed; the method comprises the following steps: performing gradient state evaluation by calculating a gradient trend index slo, performing pedaling frequency stability analysis when the evaluation is about to enter an uphill stage and a downhill stage, calculating a pedaling frequency stability index wca through a riding condition data set, and then combining the pedaling frequency stability index wca with the gradient trend index slo to construct a comprehensive tooth ratio stability index Gopt to perform comprehensive riding stability evaluation. Therefore, the rationality of tooth ratio adjustment is judged, a tooth ratio switching instruction of the front disc and the rear flywheel is sent out, self-adaptive adjustment and control of the tooth ratio under the stable states of different gradients and different pedaling frequencies are achieved, the power matching and energy utilization efficiency in the riding process is effectively improved, the load of a rider is relieved, and the riding stability is enhanced.

A fan drive gear system for a turbine engine includes a gear system with a plurality of compound intermediate gears that each include a first gear portion and a second gear portion. The second gear portion includes a forward gear portion and an aft gear portion and a ring gear assembly includes a forward ring gear that is engaged to the forward gear portion and an aft ring gear that is engaged to the aft gear portion. A carrier supports rotation of the plurality of intermediate gears with a plurality of corresponding journal bearing assemblies.

The utility model discloses a compound planetary reducer for electric melt glue of an injection molding machine, which relates to the technical field of reducers and comprises a planetary reducer, a parallel gear box is arranged on the right side of the planetary reducer and comprises a second shell, a second input shaft is arranged on the upper side in the second shell, and a second output shaft is arranged on the lower side in the second shell. A power input shaft head is arranged at the outer end of the second input shaft, a second reduction gear is fixedly arranged on the second input shaft, a first input shaft is arranged on the lower side in the second shell, a first reduction gear is fixedly arranged at one end of the first input shaft, and the first reduction gear is meshed with the second reduction gear. The first reduction gear and the second reduction gear are matched to perform primary reduction with a fixed gear ratio, so that the planetary reducer has higher stability, continuous and stable power can be conveniently transmitted to the planetary reducer, the power transmission efficiency is improved, the power input shaft head can be conveniently connected with an original hydraulic motor or servo motor, and the power transmission efficiency is improved. The equipment replacement cost is reduced.

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.

The driving force control device includes: a requested driving force calculation unit configured to calculate requested driving force requested to the vehicle, in a coasting state where neither an accelerator operation nor a brake operation is performed by a driver; a power train control unit configured to control a gear ratio of the power train on the basis of the requested driving force and driving force that is achieved by the power train in the coasting state; a braking force calculation unit configured to calculate braking force required for achieving the requested driving force, when the requested driving force is smaller than driving force that is achieved by the power train at a gear ratio set by the power train control unit; and a brake control unit configured to cause the brake to generate the braking force calculated by the braking force calculation unit.

A control device 70 for a human-powered vehicle 10 includes a controller 72 configured to switch a motor 22 between a first control state and a second control state depending on a first parameter and a second parameter. The controller 72 is configured to control the motor 22 and drive a link body 20 to switch a gear ratio in a case where the control state is the first control state and a pedaling state is a predetermined pedaling state. The controller 72 is configured to further restrict the drive of the link body 20 with the motor 22 in a case where the control state is the second control state and the pedaling state is the predetermined pedaling state. The first parameter includes at least one of a first acceleration and a first inclination angle in a first direction.The second parameter includes at least one of a second acceleration and a second inclination angle in a second direction.

[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.

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.

Mechanical infinitely variable transmissions (IVTs) and vehicles employing such IVTs are discussed. The IVT can comprise a planetary gearset with a sun gear driven based on an input angular velocity and an annulus gear driven based on a combination of the input angular velocity and a variable gear ratio of a pulley system, wherein the variable gear ratio of the pulley system can be electrically controlled by an actuator. A drive element can be driven based on a carrier of the planetary gearset.

The utility model discloses an automatic retracting reciprocating slot and gear shaping power tool apron, which relates to the technical field of metal processing, and comprises a machine shell, a machine cover, a driven gear, a stand column, a moving seat, a ring groove, a bearing, a main shaft, a base, a driving shaft and a driving gear, the machine cover is fixed on the upper part of the machine shell, the driven gear is rotatably connected inside the machine shell, and the stand column is fixed on the main shaft. The stand column is fixed to the edge of the driven gear, the moving seat is slidably connected to the interior of the machine cover through the guiding device, the annular groove is formed in the lower portion of the moving seat, the stand column is located in the annular groove, the driving device drives the driving shaft and the driving gear to rotate, and the driven gear is stressed to drive the stand column to move in the annular groove. Automatic tool retracting and reciprocating slot gear shaping functions of the movable seat and the main shaft are achieved, manual intervention is reduced, machining efficiency is improved, labor intensity is reduced, and the gear ratio of the driving gear to the driven gear is designed to be 1: 3, so that power transmission is more stable and accurate.

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 invention relates to the technical field of industrial control, in particular to a configuration method for taking a servo drive as an external encoder, which comprises the following steps: taking a first control unit as an external encoder and configuring the external encoder as an absolute value mode, taking a second control unit as a main drive unit and setting the external encoder as a full-closed-loop control mode, and converting absolute position data of a first motor into absolute position data of a second motor; the signal is converted into an incremental pulse signal, and the pulse signal is used as feedback data to be transmitted to a second servo driver for full-closed-loop position correction; recording the pulse number of the second motor and the feedback pulse number of the first control unit, calculating an electronic gear ratio, and writing the electronic gear ratio into a second servo driver; an excitation signal is injected into the second servo driver through the upper computer, response data of the second motor and the load end are recorded, gain parameters are calculated and adjusted based on the dynamic characteristics of the mechanical transmission chain of the load end, and the gain parameters are written into the second servo driver. Servo serves as an encoder, and absolute value full closed loop is achieved.