1041 results about "Transmission ratio" patented technology

Provided are a method and apparatus for controlling the steering of rear wheels, and a vehicle and a storage medium. The method for controlling the steering of rear wheels comprises: when a front-wheel steering-by-wire system fails, determining a steering control quantity of a steering wheel; on the basis of the steering control quantity, a target transmission ratio between the steering wheel and front wheels, and a yaw direction value, determining a target steering control quantity of rear wheels; and on the basis of the target steering control quantity, controlling the steering of the rear wheels. Since yaw is generated during the steering of front wheels, a yaw direction value is introduced when a target steering control quantity is determined, such that the same steering effect can be produced during the steering of the rear wheels and the steering of front wheels. Therefore, when a front-wheel steering-by-wire system fails, the method can not only aid, by means of the rear wheels, a vehicle in meeting steering requirements, but can also achieve a steering effect the same as that of the front wheels, thereby conforming to the steering habit of a vehicle user.

The invention discloses a combined type coaxial high-speed helicopter flight / turboshaft engine comprehensive control system. The system comprises the following steps that according to control mechanism parameters output by a flight control system and a combined type coaxial high-speed helicopter fuzzy torque prediction model, a flight required torque advanced prediction value of a combined type coaxial high-speed helicopter system is output; the flight required torque advanced prediction value is input into a turboshaft engine system identification model after being superposed by a variable transmission ratio proportionality coefficient to obtain a fuel prediction value, and the fuel prediction value is further superposed with the output of an engine control system to obtain the fuel input of the turboshaft engine system; calculating a flight required torque advanced prediction value error, and if the error value is greater than a threshold value, updating the fuzzy torque prediction model by using the flight state parameters of the composite coaxial high-speed helicopter system; the relative error value of the current power turbine rotating speed is calculated, and if the relative error value is larger than a threshold value, primary parameter updating is conducted on the identification model of the turboshaft engine system through a recursive least square algorithm according to the real-time and historical torque input of the turboshaft engine system and the power turbine rotating speed. According to the method, under the condition that the constant rotating speed control target of the turboshaft engine is considered, the stability of a coaxial high-speed helicopter flight / turboshaft engine comprehensive control system is enhanced, the response speed of the turboshaft engine is increased, and the overshoot and droop amount of the rotating speed of a power turboshaft is reduced.

The invention provides a method and device for controlling steering of rear wheels, a vehicle and a storage medium. When a front wheel steer-by-wire system of the vehicle breaks down, the front wheel steer-by-wire system cannot control front wheel steering. Therefore, rear wheel intervention is needed to achieve vehicle steering. According to the scheme, when the front wheel steer-by-wire system fails, the steering control quantity of a steering wheel is determined; a target steering control amount of the rear wheels is determined based on the steering control amount, a target gear ratio between the steering wheel and the front wheels, and the yaw direction value. Due to the fact that yawing can be generated in front wheel steering, the yawing direction value is introduced when the target steering control quantity is determined in the scheme. Therefore, the steering effect of the rear wheel is the same as that of the front wheel. A target angle value for rear wheel rotation is also determined based on the steering control amount and the target gear ratio. Therefore, according to the scheme, when the front wheel steer-by-wire system fails, the vehicle can be assisted by the rear wheels to meet the steering requirement, the steering effect the same as that of the front wheels is achieved, and the steering habit of a vehicle user is met.

The invention discloses a rotary joint actuator and a design method thereof.The rotary joint actuator comprises a fixed shell, the fixed shell comprises a front cover and a rear cover, and a frameless motor and a cam curved surface tooth planetary reducer are both arranged in a mounting cavity reserved between the front cover and the rear cover; the driving device is connected with the frameless motor; the driving device comprises a driving plate, the encoder is fixed on the driving plate, the driving plate is fixed inside a driving cover plate, and the driving cover plate is fixed outside the rear cover; the cam curved surface tooth planetary reducer comprises an input bearing, a planetary needle bearing, a planetary carrier set and a planetary gear set. The planetary gear set comprises a sun gear, a curved surface tooth planet gear and a gear ring which is in conjugate engagement with the curved surface tooth planet gear. The invention discloses a rotary joint actuator and a design method thereof, and the rotary joint actuator is compact in structure and has the characteristics of large transmission ratio, high transmission precision and good stability under the condition of size control.

The invention is suitable for the field of vehicle steer-by-wire, provides a steer-by-wire steering wheel force sensing redundancy device and a control strategy, and realizes reliable force feedback of a steering wheel through double force sensing redundancy design of a mechanical spring and a road sensing motor. The algorithm comprises the steps of monitoring the state of a road sensing motor in real time, automatically switching to a mechanical redundancy mode when communication loss, current overload and other abnormalities occur, and dynamically adjusting a four-wheel steering strategy according to the vehicle speed, wherein the flexibility is improved through low-speed out-phase steering, and the stability is improved through high-speed in-phase steering. A steering protection mechanism is arranged, and a front wheel fixed transmission ratio and steering angle limitation are triggered after overrun. Through combination of structural redundancy and intelligent control, the reliability and safety of the steer-by-wire system are remarkably improved, and the steer-by-wire system has good control performance and driving experience.

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 invention discloses a gear shifting gearbox and an asynchronous rolling mill, and relates to the technical field of rolling equipment. The transmission mechanism comprises a main transmission shaft, a first output shaft and a second output shaft, the main transmission shaft, the first output shaft and the second output shaft can be rotationally installed in the box body along the axes of the main transmission shaft, the first output shaft and the second output shaft are driven by the main transmission shaft to rotate, and the rotation directions of the first output shaft and the second output shaft are opposite; the gear shifting mechanism comprises a wheel disc and a plurality of first gear sets, the wheel disc can rotate around the axis of the wheel disc to be connected to the main transmission shaft, the first gear sets are arranged on one end face in the wheel disc, all the first gear sets are in transmission connection with the main transmission shaft, and different first gear sets are switched through rotation of the wheel disc to be in transmission connection with the first output shaft; the main transmission shaft is in transmission connection with the first output shaft through one of the multiple first gear sets, the transmission ratios of the first gear sets are different, and multiple rotation speed ratios exist between the first output shaft and the second output shaft.

The present invention provides a flapping-wing mechanism based on incomplete gear transmission, including a skeleton support structure, a reduction gear structure, a flapping-wing rod structure, a transmission gear structure, a transmission main shaft structure and a motor structure; the motor structure, the reduction gear structure, the transmission main shaft structure, the transmission gear structure and the flapping-wing rod structure are sequentially connected in transmission. A motor output shaft gear is arranged on the output shaft of the motor. The reduction gear structure includes a first reduction gear and a double-layer gear; the transmission gear structure includes a first incomplete gear, a second incomplete gear and a third incomplete gear; in the present invention, the transmission gear structure is used to cooperate with the flapping-wing rod structure to convert the rotational motion of the main shaft structure driven by the motor into the flapping motion of the flapping-wing rod structure through a plurality of incomplete gears, without a quick return characteristic and with uniform speed changes. And through the mutual meshing between the gears, the technical effects of high flapping synchronization and stable and consistent transmission ratio can be achieved.

The invention discloses a winding drum rope arranging device which comprises a winding drum base, a winding drum, a gear transmission mechanism, a lead screw, a swing roller assembly, a convex shaft and a reversing assembly. The reversing assembly comprises a power assembly and a reversing clutch assembly. The gear transmission mechanism and the lead screw convert rotary motion of the winding drum into linear motion of the swing roller assembly, so that the winding drum moves along with the rope coiling position. When the winding drum is full of one layer, the swing roller assembly reaches the limit deviation position to drive the protruding shaft to rotate, the power assembly amplifies the rotation angle and conducts one-way transmission, and the reversing clutch assembly changes the rotation direction of the lead screw to achieve reversing. A pure mechanical structure is adopted, a sensor and an electric control system are not needed, reliability is high, and cost is low; the swing roller assembly reduces abrasion of the steel wire rope and limits the support to guarantee accurate movement; rope arrangement synchronization is achieved through the transmission ratio design, the reversing assembly has the precise reversing function and the torque protection function, the rope disorder and rope sinking phenomena can be effectively avoided, and the service life of the steel wire rope is prolonged.

A gearing assembly (12) for a brake actuator (10), comprising the following features:a drive element (33),a first driven element (36),a second driven element (38), anda gearing output element (40),wherein, with respect to the drive element (33), the first driven element (36) has a different transmission ratio than the second driven element (38),wherein the first driven element (36) can be coupled to the gearing output element (40) by a first clutch (42), which comprises a first drive body (50) and a first driven body (52), andwherein the second driven element (38) can be coupled to the gearing output element (40) by a second clutch (46), which comprises a second drive body (62) and a second driven body (64) and is designed as an overrunning clutch,and a brake actuator (10) comprising a gearing assembly (12).

The invention provides a multi-gear electric drive axle system, a combined structure and a vehicle. The multi-gear electric drive axle system comprises a motor, a differential mechanism, an output shaft, a first intermediate shaft, a second intermediate shaft and a third intermediate shaft. The motor inputs power through the first intermediate shaft, the third intermediate shaft and the second intermediate shaft in sequence, and the third intermediate shaft is hollowly sleeved on the output shaft; a first gear set and a first gear shifting mechanism are arranged on the third intermediate shaft; a second gear set, a second gear shifting mechanism and a third transmission gear are arranged on the second intermediate shaft, and the third transmission gear is meshed with the differential mechanism; gears in the first gear set are kept in a constant meshing state with corresponding gears in the second gear set to form a plurality of transmission gear pairs, and the transmission gear pairs have different transmission ratios; through different combination states of the first gear shifting mechanism, the second gear shifting mechanism and the corresponding gear sets, power transmission of multiple different gears can be achieved.

The invention belongs to the technical field of new energy automobile transmission, and particularly discloses a double-gear electric drive axle system and a gear shifting control method.The system mainly comprises a drive motor, a first-stage gear pair, a second-stage gear pair, a synchronizer and a planetary gear mechanism, and high-gear and low-gear switching is achieved through axial movement of the synchronizer. At a high gear, a gear ring of the planetary gear mechanism is jointed with the sun gear, and the transmission ratio is 1; in the low gear, the gear ring is locked, and speed reduction transmission is achieved. The gear shifting control method comprises a gear upshift process and a gear downshift process, and gear shifting without power interruption is achieved through the steps of torque clearing, gear disengagement, rotating speed adjustment, gear engagement, torque recovery and the like. The multi-gear biased electric drive axle has the technical advantages of simple and compact mechanical structure, easiness in control, uninterrupted power and the like, and meanwhile, the drive axle adopts the countershaft to perform coaxial biased arrangement, so that the problem of intensified mass center bias of the multi-gear biased electric drive axle is relieved, direct connection of a high-speed motor and a planetary gear mechanism is avoided, and the problems of uneven load and NVH of planetary gears are solved.

The invention relates to a cooperative control method for front and rear wheel turning angles of a drive-by-wire four-wheel steering vehicle, which belongs to the technical field of vehicle dynamics control, and comprises the following steps of: S1, designing a variable angle transmission ratio of the drive-by-wire front wheel steering vehicle on the basis of invariable steady-state yaw velocity gain; s2, calculating a target side slip angle and a target yaw velocity of the drive-by-wire front wheel steering vehicle based on a given steering wheel angle input; and S3, generating a front wheel steering angle and a rear wheel steering angle of the drive-by-wire four-wheel steering vehicle by taking the dynamic output of the front wheel steering vehicle as a target based on a multi-objective optimization framework of model predictive control MPC. The control inconsistency of the steering system caused by the change of the vehicle speed is avoided, the steering characteristics of the front wheel steer-by-wire vehicle can be accurately tracked, and the driving burden is effectively reduced.

The disclosure relates to a transmission system for a human powered vehicle, or light electric vehicle, comprising a crank housing, a crank axle, a front sprocket mounted to an output shaft concentric with the crank axle, and a transmission having an input connected to the crank axle and an output connected to the output shaft. The transmission comprises a planetary gear system, configured to be operated according one of a plurality of different selectable transmission ratios, mounted on a lay shaft which is offset and parallel to the crank axle, and an input transmission stage for transmitting torque from the crank axle to an input of the planetary gear system, wherein the input transmission stage has a speed increasing transmission ratio.

The present application relates to the technical field of speed reducer, especially to a hollow composite planetary speed reducer, which comprises a machine shell, an input shaft rotatably connected to the machine shell, a sun gear fixedly connected to the input shaft, an outer gear ring installed in the machine shell, three planetary gears meshing between the outer gear ring and the sun gear, a planetary carrier rotatably connected to the three planetary gears, a worm fixedly connected to the planetary carrier, a rotating shaft rotatably connected to the machine shell, a worm wheel meshing with the worm and fixedly connected to the rotating shaft, and an output shaft rotatably connected to the rotating shaft. The present application combines the planetary speed reducer with the worm and worm gear speed reducer to form a composite speed reducer, which solves the self-locking defect of the planetary speed reducer and the low efficiency problem of the worm and worm gear speed reducer, and realizes secondary speed reduction, thereby increasing the transmission ratio and reducing the overall size of the device, improving the working efficiency and safety of the speed reducer.

The invention relates to the technical field of steer-by-wire, and discloses a steering wheel and steering angle alignment method and device for a steering wheel end and a vehicle. In the process that the steering wheel is controlled to rotate in the first direction based on the initial transmission ratio and the steering angle of the steering wheel end, a steering wheel clamping stagnation signal is detected; determining the current steering angle of the steering wheel as a first clamping stagnation angle; the steering wheel is controlled to rotate in the second direction based on the first tail end angle, whether clamping stagnation exists in the rotating process of the steering wheel or not is monitored, the first clamping stagnation angle and the first tail end angle or the first clamping stagnation angle and the second clamping stagnation angle form a non-clamping stagnation angle range of the steering wheel, and the target transmission ratio is calculated; and determining a target angle based on the target transmission ratio and the steering angle of the steering wheel end, and controlling the steering wheel to rotate by the target angle in the first direction, so that the steering angle of the steering wheel is aligned with the steering angle of the steering wheel end, and the vehicle can still be safely driven when the steering wheel is blocked.

The present invention relates to a transmission device for a steering system. The steering system includes a transmission unit with a rotatable first gear element, which may be driven by a drive. The steering system also includes a rotatable second gear element, which is operatively connected to the first gear element for transmitting the drive movement as a function of a transmission ratio between the first and second gear elements. A monitoring unit is further included for monitoring the transmission unit with a detection means for detecting an actuated rotational position of the transmission unit when transmitting the drive movement within a predefined rotational range. The invention also relates to a steering system, a method, and a computer program product.

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.

A motor vehicle comprises at least: a first transmission for transmitting a steering angle of a handlebar to each steered wheel, which wheels are each structurally supported by an element of a second transmission, which is fixed to the frame, enabling a bouncing movement of the suspension. The first movement mechanism is composed of a shear type mechanism with two elements, and one element is integrated with a main shaft of a wheel. The original characteristic is beneficial for managing the suspension sinking effect caused by ground braking force; it is also helpful to manage different dragging distance changes caused by additional displacement of the rotation axis of the wheel (the additional displacement overlaps with the displacement caused by the suspension movement mechanism), and also helpful to manage different transmission ratios between the column rotation angle of the handlebar operated along the axis and the wheel steering angle measured along the steering axis. The steering angle is measured on an element of an integrated main shaft, rather than downstream of a transmission scissor movement mechanism, and the main shaft contains a wheel rotating shaft.

The invention discloses a variable transmission ratio control method for a steer-by-wire system. The variable transmission ratio control method comprises the following steps that 1, data signals of the actual steering control state of a whole vehicle in the running process of the vehicle are collected in real time; step 2, determining a current basic transmission ratio according to a preset rule and calculating a transmission ratio gain according to the vehicle speed, thereby calculating a reference transmission ratio; 3, determining a transmission ratio change gradient gain according to a rack speed or a steering wheel angular speed, and determining a transmission ratio according to a preset formula; and 4, determining the current constant-speed maximum turning rack position according to the vehicle speed and a preset rule, judging whether the current steering control of the vehicle is in a safe area or not according to the maximum turning rack position, and further determining whether the change of the transmission ratio is limited or not. The invention further discloses a variable transmission ratio control system of the steer-by-wire system.

The invention discloses a tractor tilling depth adjusting method and device, and belongs to the technical field of agricultural machinery. The method comprises the steps that the transmission speed ratio is determined according to the wheel rotating speed and the engine rotating speed of the tractor; determining the output power of the engine according to the engine speed; according to the engine rotating speed, the output power, the accessory consumption power and the transmission speed ratio, the maximum traction force capable of being provided by the tractor is determined; the tilling depth of the plough is adjusted according to the pulling force of the plough on the tractor, the maximum traction force and the set tilling depth. According to the embodiment of the invention, the tilling depth can be automatically adjusted according to the load change in the tilling operation process of the tractor, the problem of serious speed reduction of an engine is avoided, the tilling depth adjusting efficiency is improved, and the tilling operation efficiency is improved.

The invention discloses a planetary clutch device, and belongs to the technical field of steering engines. The device is used for conducting conversion of different transmission ratios on a steering engine and comprises a clutch spring, a sun clutch piece, a ring gear clutch piece, a planet gear and a planet carrier used for installing the planet gear, the clutch spring abuts against the left end face of the sun clutch piece, the right end face of the sun clutch piece is matched with the ring gear clutch piece in a separable mode, and the planet carrier is used for installing the planet gear. The ring tooth clutch piece comprises an inner gear ring, the planet teeth are meshed with the inner gear ring, and when the clutch spring is stressed to be in a clutch state, the sun clutch piece is disengaged from the ring tooth clutch piece, meanwhile, the sun clutch piece is matched with the planet teeth, and therefore transmission ratio conversion is achieved. The device has the beneficial effects that when the starting speed is high and the load is increased, the clutch of the steering engine is triggered, the planetary gear set immediately joins in transmission, the gear ratio is increased, the torque is increased, and torque conversion can be achieved without electric control matched gear shifting.

The invention discloses a gear transmission return difference dynamic measurement method and system based on double encoder difference, and belongs to the technical field of precision measurement and transmission control, and the method comprises the steps: respectively installing encoders on an input shaft and an output shaft of a gear transmission chain, and synchronously collecting and obtaining an angle data sequence through nanosecond timestamps; a recursive least square algorithm is adopted to calibrate the transmission ratio in real time; extracting an equivalent return difference angle through phase difference residual step detection at a speed reversing moment; establishing a multiple regression model of the return difference, the rotating speed, the load and the temperature; according to the method, the technical problem that the dynamic return difference characteristic under the variable load and variable speed working condition cannot be accurately represented by a traditional static measurement method is solved, the measurement precision is superior to 1 arc second, and the return difference compensation effect reaches 80% or above.

The utility model belongs to the technical field of transmission, and particularly relates to a mid-shaft transmission, a mid-mounted motor and a vehicle. The mid-shaft transmission provided by the present application comprises: a transmission mechanism, comprising more than two gear sets, a first transmission shaft and a second transmission shaft, each gear set comprising a pair of gears meshing with each other, the gears of the gear sets are respectively arranged on the first transmission shaft and the second transmission shaft, and the transmission mechanism has at least two transmission ratios; an input component connected to the first transmission shaft for inputting torque to the first transmission shaft; an output component connected to the gear set for outputting torque; a shift mechanism for switching different gear sets to change the transmission ratio of the transmission mechanism; a shift assist mechanism, when the shift mechanism cannot switch different gear sets to work, the torque of the second transmission shaft is transmitted to the shift mechanism through the shift assist mechanism to smoothly complete the shift operation.

The invention relates to a vehicle transmission torque control method and system and an engineering vehicle, and the control method comprises the steps: confirming the speed ratio of a gearbox, confirming the gear of the gearbox, limiting the torque of an engine, delaying the judgment time by setting the gear, and if the time of the gearbox at the gear does not exceed the judgment time, starting the engine; if yes, the gear determined according to the speed ratio range and the gear determined at the last moment are smaller and serve as the current gear of the gearbox; the control system comprises a gearbox speed ratio calculation module, a gearbox gear confirmation module, a gear protection module and an engine torque limiting module. The engineering vehicle is provided with the control system. According to the method, gear judgment and engine output torque limiting are carried out on the engineering vehicle provided with the manual box, and the gear judgment method is simple, accurate in gear judgment, low in cost and high in safety.

The invention relates to the field of motor control and adjustment, in particular to a motor rotating speed adjusting method and system for a remote control driving vehicle, and the method comprises the steps: obtaining and preprocessing vertical, transverse and longitudinal vibration signals and running speed data of each wheel of the vehicle; extracting a vibration anomaly feature sequence and an average vehicle speed sequence through a sliding window method, and analyzing correlation to quantify road condition features; quantizing the wheel cooperative stability based on the wheel vibration correlation and the transverse / vertical energy ratio difference degree, and fusing the maximum road condition feature value and the stability mean value to obtain a rotating speed adjustment factor; the actual target rotating speed of the motor is calculated by combining the preset vehicle speed, the transmission ratio and the like, and precise vehicle speed adjustment is achieved through PID closed-loop control. According to the method, the rotating speed adjusting factor is constructed by quantifying the three-dimensional road condition characteristics and the vehicle dynamic stability, real-time adaptive adjustment of the vehicle speed is achieved in combination with PID closed-loop control, and the safety and stability of remote control driving are remarkably improved.

A control device for a human-powered vehicle has an electronic controller that controls a motor that applies a propulsion force to the human-powered vehicle to assist a human driving force. The human-powered vehicle includes a transmission device. The electronic controller is configured to assist in propulsion of the human-powered vehicle with the motor in a state in which the human-powered vehicle is propelled by the human driving force. In a case where a transmission ratio of the transmission device is changed, the electronic controller decreases an assist level of the motor in accordance with the human driving force input to the human-powered vehicle, and controls the motor so that the assist level is greater for a case where the human driving force is a first human driving force than the assist level for a case where the human driving force is less than the first human driving force.

The invention discloses an assembling structure and method for a pure electric steering gear with double speed reducing mechanisms, and relates to the technical field of pure electric steering gear. According to the structure, a speed reducing shell and a motor controller are arranged on a steering gear shell, and a first-stage speed reducing mechanism composed of a small gear and a large gear is sequentially arranged in the speed reducing shell; one end of the worm is connected with the large gear through a transmission balance shaft, and a spring and a bearing are arranged in the transmission balance shaft to achieve radial elastic supporting and mechanical balance. The assembling method is carried out according to the sequence of the self-adaptive adjusting assembly, the worm, the transmission balance shaft, the speed reduction shell, the steering gear shell and the motor controller, and through a rotation test, the meshing clearance of the gear pair and the worm and gear pair is subjected to self-adaptive compensation by utilizing elastic deformation of a spring and a rubber element. Under the condition of a single motor, a large total transmission ratio and a large steering output torque are obtained, and meanwhile transmission stability, noise vibration performance and long-term use reliability are considered.

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 utility model discloses a speed increasing mechanism and a speed increasing box. The speed increasing mechanism comprises an input shaft, an output shaft, a duplicate gear, a power input gear and a power output gear. The input shaft and the output shaft are coaxially arranged; the duplicate gear comprises a first gear and a second gear, and the first gear and the second gear are coaxially and fixedly connected; the transmission ratio of the power input gear to the first gear and the transmission ratio of the second gear to the power output gear are smaller than and equal to each other. According to the speed increasing mechanism, two-stage speed increasing transmission is achieved through the arrangement of the duplicate gear, the two-stage speed increasing transmission ratio is consistent through the duplicate gear structure and the setting of parameters of the first gear and the second gear, and coaxial arrangement of the power input shaft and the power output shaft is achieved.