10961 results about "Reduction drive" patented technology

An actuator, relating to the technical field of robots. The actuator comprises: a speed reducer shell (1), a planetary speed reducer (2) and an output-end supporting bearing (3), wherein the speed reducer shell (1) is provided with a connecting flange (101) and a connecting section (102), which is located on an inner side, the planetary speed reducer (2) is provided with a ring gear flange (2011) located on an outer side of a ring gear (201), the ring gear flange (2011) is arranged on one side of the connecting section (102), and the output-end supporting bearing (3) is arranged on the other side of the connecting section (102) and is connected by means of a fastener; an electric-motor rotor (4) and an electric-motor output shaft (5), the electric-motor rotor (4) being arranged on an outward extension portion of the electric-motor output shaft (5), and the electric-motor output shaft (5) being fixedly connected to an input end of the planetary speed reducer (2); and an electric-motor housing (6) and an electric-motor stator (7), wherein the electric-motor housing (6) is provided with a connecting end (601), the electric-motor stator (7) is arranged in the electric-motor housing (6), and the connecting end (601) is fixedly connected to the connecting flange (101).

The invention provides a self-adaptive anti-backlash planetary gear reducer and a working method thereof. The self-adaptive anti-backlash planetary gear reducer comprises an input shaft and a shell. An electromagnet coil, an electromagnet, a sliding block seat, a supporting seat, a sun gear and a second inner gear ring sequentially penetrate through one end of the input shaft from one end to the other end; the side, away from the input shaft, of the second inner gear ring is connected with an output shaft. A planet carrier is slidably arranged on the supporting seat in the radial direction, a first planet gear and a second planet gear are coaxially arranged on the planet carrier, a first inner gear ring is arranged on the inner side of the shell, and the sun gear, the first planet gear and the second planet gear are engaged with the first planet gear, the first inner gear ring and the second inner gear ring correspondingly; the electromagnet is fixed to the sliding block base, the sliding block base, the supporting base and the second inner gear ring are all rotationally connected with the input shaft, and the sliding block base can slide on the input shaft in the axial direction. And the sliding block seat is hinged with the planet carrier through a connecting rod. The speed reducer is simple in structure, has the self-adaptive anti-backlash capability, and can realize self-adaptive real-time elimination of the transmission backlash.

The invention relates to a commercial vehicle electric drive axle and a vehicle, and relates to the technical field of vehicle power systems. An electric drive axle of a commercial vehicle comprises a main speed reducer assembly connected with the output end of a motor assembly, one output end of the main speed reducer assembly is connected with the input end of a power takeoff assembly, and the motor assembly drives the power takeoff assembly to output power through the main speed reducer assembly. The power takeoff assembly is integrated on the main speed reducer assembly, the functions of parking power takeoff and traveling power takeoff can be achieved, the power takeoff assembly is particularly suitable for a 6 * 4 tractor pulling coal, and the application cost of an electric power takeoff system can be greatly reduced; meanwhile, the electric drive axle is compact in overall structure, small in occupied chassis space, low in design and manufacturing cost and beneficial to development of new energy tractors.

A harmonic reducer, a mechanical arm and a robot, the harmonic reducer comprising a circular spline, a flexspline and a wave generator, wherein the wave generator comprises a cam and a flexible bearing; a bearing outer ring is provided on an outer peripheral wall of at least one side of the cam, and the cam is rotationally connected to the bearing outer ring; and an outer peripheral wall of the bearing outer ring is connected to an inner peripheral wall of the circular spline. In the present invention, the bearing outer ring is arranged on an outer peripheral wall of at least one end of the cam, and the cam serves as a bearing inner ring, such that parts and components are reduced; and under the same bearing capacity, the bearing outer ring limits the flexspline and the flexible bearing, a sealing ring is omitted, and no additional connecting component or fixing component needs to be used for fixing the flexspline, thereby simplifying the process and reducing the volume and the weight of the harmonic reducer. The harmonic reducer in the present invention can be directly connected to an electric motor, and no additional bearing is needed, which reduces the axial length when the harmonic reducer is connected to the electric motor, and does not reduce the power of the electric motor, thereby further achieving the aim of miniaturization, and thus the cost is reduced and promotion is facilitated.

The invention relates to an integrated oil cooling hub speed reduction electric wheel which comprises a motor, a planetary gear speed reducer and a bearing system which are arranged in the axial direction, and the planetary gear speed reducer is arranged in the motor and integrated with a brake. The bearing system comprises a rotor supporting bearing used for supporting a motor rotating system and a hub bearing used for supporting a wheel rotating system, the motor, the planetary gear reducer and the rotor supporting bearing are designed in an integrated oil cooling mode, and cavities where the motor, the planetary gear reducer and the rotor supporting bearing are located are communicated with one another. Cooling liquid cools and lubricates the motor, the planetary gear reducer and the rotor supporting bearing at the same time. Compared with the prior art, the electric wheel is compact in structure, the number of sealing pieces of the electric wheel can be reduced on the premise that the electric wheel has good structural rigidity, the axial size of an electric wheel assembly is reduced, and the electric wheel has the advantages of being good in cooling effect and easy to maintain.

The utility model discloses an integrated joint motor, which comprises a speed reducer assembly, a motor assembly, a shell and a driver assembly, the motor assembly and the driver assembly are both arranged on the shell, a center wheel is arranged in the middle of the motor assembly, a containing part is arranged on the outer side of the center wheel, the speed reducer assembly is coaxially arranged in a containing cavity and meshed with the center wheel, and the integrated joint motor is compact in structure, large in transmission ratio, large in torque output and small in mass size.

The invention is suitable for the technical field of fault detection, and provides a fault detection method and device for a joint module and electronic equipment. The joint module comprises a motor, a speed reducer connected with the motor, a first encoder arranged between the motor and the speed reducer, and a second encoder arranged at the output end of the speed reducer. The fault detection method comprises the following steps: identifying a position difference between a rotor of the motor and an output shaft of the speed reducer based on the first encoder and the second encoder; and according to the position difference and a preset difference threshold value, whether the joint module has a fault or not is determined, and the difference threshold value is associated with the gear meshing clearance of the speed reducer. According to the embodiment of the invention, whether the joint module has a fault or not can be accurately detected.

The invention relates to the technical field of screening, and discloses an iron ore powder and antifreezing agent mixed screening device which comprises a rack, and the surface where the top of the rack is located is inclined; a first bearing seat is mounted on the rack, a roller with a rubber wheel surface is rotationally connected to the first bearing seat, a universal coupling is connected to the shaft end of the roller, a shaft rod is connected to the other end of the universal coupling, a speed reducer arranged on a second supporting seat is connected to the free end of the shaft rod, and the second supporting seat is connected with the rack; the speed reducer is driven by a first motor arranged on the rack, and the first motor and the speed reducer transmit power through belt transmission; a drum screen assembly used for improving the mixing uniformity of the iron ore powder and the anti-freezing agent is connected to the rolling wheel in a rolling mode, and mixed materials are discharged from screen holes of the drum screen assembly. Mixing, screening, conveying and cleaning are integrated, mixing uniformity is high, screening efficiency is excellent, operation and maintenance are convenient and fast, and the requirement for mixing and screening of iron ore powder and an anti-freezing agent is met.

The invention relates to the technical field of spline machining, in particular to a spline machining device and method for an eccentric shaft of a speed reducer, and the method comprises the steps that the amplitude-frequency difference between all cutting force data and all vibration data in a frequency domain and the correlation between all cutting force data and all temperature data within a preset duration before all moments are analyzed; determining a cutting risk value; comprehensively analyzing a cutting risk value, an energy ratio, a dominant frequency amplitude difference between all vibration data and all cutting force data in a frequency domain and a change relation of a cutting related index along with the machining quality in a preset period before the current moment, predicting a machining quality score to determine a machining instability index, and combining the energy ratio and the machining quality score to determine the machining instability index. And determining a main shaft rotating speed correction value and a cutter feeding amount. The problem of compensation failure of traditional PID control is solved, the spline machining quality is improved, and the service life of a workpiece is prolonged.

A two-way oil-collecting reducer and an electric vehicle. The reducer includes an input gear, an intermediate gear set, an output gear, and an oil sump, and the oil sump includes a radial sump opening and a circumferential sump opening. An orientation of the radial sump opening is away from the intermediate gear set along a radial direction of the intermediate gear set. An orientation of the circumferential sump opening faces the output gear along a circumferential direction of the intermediate gear set. The radial sump opening and the circumferential sump opening are formed at the oil sump, so that the oil sump can collect lubricating oil churned by a gear train when the input gear drives, via the intermediate gear set, the output gear to rotate forward or reversely, to increase an amount of lubricating oil collected by the oil sump.

The joint module comprises a motor and a harmonic reducer, the motor comprises a shell, a stator assembly and a rotor assembly, the shell comprises an outer shell and an inner oil cavity, a first oil port and a second oil port are formed in the two ends of the inner oil cavity respectively, the stator assembly is fixed to the inner side of the inner oil cavity, and the rotor assembly is fixed to the outer side of the inner oil cavity. The rotor assembly comprises a rotating shaft and a rotor hub arranged on the rotating shaft, the rotor hub comprises an inner shell and an outer shell, the inner shell and the outer shell are fixed through a connecting piece, an oil stirring channel is formed, the harmonic reducer comprises a wave generator, a flexible gear, a supporting bearing outer ring and a supporting bearing inner ring, and the rotating shaft is connected with the wave generator. The wave generator drives the flexible gear to deform, the flexible gear is fixed to the rear end cover, the outer ring of the supporting bearing is fixed to the rear end cover, and a gear ring is arranged on the inner wall of the inner ring of the supporting bearing and is in staggered tooth transmission with the flexible gear. Oil liquid is in direct contact with a stator heating source, the stator heat dissipation efficiency is improved, the rotor hub drives the oil liquid to flow, and the heat exchange efficiency is improved.

Provided is an electric heavy-load push-pull tool including a power input unit, a power conversion unit and a power output unit. Through the transmission design of multiple stages of reducers and a planetary roller screw of a downhole operation tool, low-speed and high-torque power output of the motor is realized. The heavy-load push-pull tool provided by the present disclosure can not only provide large-torque thrust force, but also provide large-torque pulling force. A forward direction of a transmission nut is based on a rotation direction of a motor. By controlling the forward rotation or reverse rotation of a transmission shaft of the motor, the forward or backward movement of an operation tool can be realized at low cost through power transmission.

The invention provides a sunshade curtain assembly, a glass assembly and a vehicle. The sunshade curtain assembly comprises a sunshade curtain, a rolling assembly and a driving assembly. The rolling assembly comprises a supporting piece used for rolling the sunshade curtain. The driving assembly comprises a speed reducer and a motor, a center shaft of the speed reducer coincides with a center shaft of the motor, the center shaft of the speed reducer and the supporting piece extend in the same direction, and one end of the supporting piece penetrates through the speed reducer and is rotationally connected with the speed reducer. The motor drives the supporting piece to rotate through the speed reducer, and therefore the sunshade curtain is rolled. The central axis of the speed reducer and the central axis of the motor coincide, the driving assembly can only occupy the size space of the vehicle in one direction, the occupied space is small, the size can be reduced, the occupied space is reduced, arrangement of other parts is facilitated, the vehicle sky screen view is wider, and more arrangement space is provided for vehicle body metal plates. The motor and the speed reducer are coaxially arranged without a cantilever, so that the motor is more stable in structure and free of deflection in the operation process, and the risk of vibration and abnormal sound is reduced.

The invention provides a helicopter transmission system coaxiality detection and adjustment device and method, the device comprises a main controller 10, a laser emitter 20 and a laser receiver CCD 30, the main controller 10 comprises a computer 11 and a control box 12, after a control instruction on the computer 11 is sent, the control instruction is directly transmitted to the control box 12 through a USB interface; the laser transmitter 20 comprises a first laser transmitter 21 and a second laser transmitter 22, the first laser transmitter 21 comprises a first laser transmitter 211, a first adjusting flange 212 and a positioning cylinder 213, and the second laser transmitter 22 comprises a second laser transmitter 221, a second adjusting flange 222 and a positioning cylinder 223; the laser transmitter 20 is installed on a simulation output shaft flange plate of an engine or a main speed reducer, and the positioning cylinder 223 and the output end of the engine or the main speed reducer are installed in a positioning fit mode.

The invention relates to the technical field of unmanned aerial vehicle control, and discloses a high-precision hovering system and method for an omni-directional flying robot, and the method comprises the steps: collecting the connection state of a module assembly, and allowing a flying action when the connection state is judged to be normal; collecting GNSS signal intensity of the positioning sensor, determining a positioning decision mode according to the GNSS signal intensity, and generating flight attitude control data according to the positioning decision mode; according to the flight attitude control data, the flight attitude of the flying robot is adjusted based on closed-loop PID control of a harmonic reducer and a servo motor; obtaining predicted wind speed data, determining disturbance torque, and performing feed-forward compensation on the flight attitude according to the disturbance torque; and controlling the central double rotors of the flying robot to continuously operate, and controlling the outer side rotors in the flying robot to start and stop based on Q-learning. According to the invention, the anti-wind hovering performance is guaranteed, the energy utilization rate is improved, and the environmental adaptability, the anti-wind stability and the cruising ability of the aircraft are enhanced.

The invention provides an efficiency simulation method and device for a speed reducer of an electric drive system. The method comprises the following steps: constructing a speed reducer simulation model; performing dynamic simulation on the speed reducer under the set working condition to obtain simulation data; constructing a speed reducer system efficiency simulation platform according to the simulation data; performing simulation calculation according to the speed reducer system efficiency simulation platform to obtain a simulation calculation result; according to the speed reducer system efficiency simulation platform and the simulation calculation result, various types of losses are calculated; efficiency calculation is carried out according to a reducer system efficiency simulation platform and various types of losses, and reducer cycle working condition comprehensive efficiency is obtained; and when the comprehensive efficiency of the speed reducer cycle working condition reaches a preset efficiency target, outputting a speed reducer simulation model. The method and the device can comprehensively consider the actual working condition, optimize the design of the speed reducer to improve the comprehensive efficiency performance, improve the efficiency simulation precision of the speed reducer in the electric drive system, shorten the design iteration period and cost, and facilitate the improvement of the research and development efficiency and the overall performance of the product.

The invention provides a sunshade curtain assembly, a glass assembly and a vehicle. The sunshade curtain assembly comprises a sunshade curtain, a rolling assembly and a driving assembly. The winding assembly comprises a first rotating wheel and a transmission part. The driving assembly comprises a speed reducer and a motor, the center axis of the speed reducer coincides with the center axis of the motor, and the center axis of the speed reducer is perpendicular to the length direction of the transmission part. The motor can drive the transmission part to rotate through the speed reducer and the first rotating wheel in sequence so as to drive the sunshade curtain to move. The central axis of the speed reducer and the central axis of the motor coincide, so that the driving assembly can only occupy the size space of the vehicle in one direction, the occupied space is small, the size can be reduced, the occupied space is further reduced, arrangement of other parts is facilitated, the field of view of a vehicle sky screen is wider, and more space capable of being arranged is provided for a vehicle body metal plate. Moreover, the motor and the speed reducer are coaxially arranged without a cantilever, so that the motor is more stable in structure and free of deflection in the operation process, and the risk of vibration and abnormal sound is reduced.

The invention provides a harmonic joint. The harmonic joint comprises a joint shell and a speed reducer assembly. A first limiting ring groove is formed in one end of the inner peripheral wall of the joint shell; the speed reducer assembly is arranged in the joint shell and comprises a rigid wheel and a rolling body. A second limiting ring groove corresponding to the first limiting ring groove in position is formed in the peripheral wall of the rigid wheel, and the second limiting ring groove and the first limiting ring groove form a limiting ring cavity. The rolling body is arranged in the limiting ring cavity, and the rolling body, the peripheral wall of the rigid wheel and the peripheral wall of the joint shell jointly form a rolling bearing structure.

The invention relates to the technical field of electric vehicle transmission and control, in particular to an electric vehicle speed reducer parking motor position feedback system. The system aims at solving the problems that the position feedback precision is reduced, the reliability is insufficient and the redundancy is deficient in a severe environment in the existing scheme. According to the system, through redundancy design of a main position sensing module (a magnetoelectric encoder) and an auxiliary position sensing module (an inductive sensor) and in combination with a multi-source data fusion module (based on Kalman filtering), anomaly detection and fault tolerance, position prediction and compensation and a temperature compensation and self-adaptive calibration mechanism, accurate feedback of the position of the parking motor rotor is achieved. According to the system, the accuracy and robustness of position feedback and the reliability of the system can be remarkably improved, the service life of a parking mechanism is prolonged, and the parking safety is improved.

A coaxial electric drive axle comprises an electric drive assembly and an electric drive axle housing, the drive assembly comprises a housing, a motor, a speed reducer gear set and a differential mechanism, the motor, the speed reducer gear set and the differential mechanism are arranged in the electric drive axle housing of an integrated structure, the electric drive axle housing comprises a main axle housing and a rear cover, the main axle housing is provided with a mounting cavity, the rear side of the main axle housing is connected with the rear cover, and the front side of the main axle housing is connected with the housing. The shell is provided with a stator fixing plate, a motor stator is fixed on the stator fixing plate, a motor shaft, an intermediate shaft and a differential mechanism are supported on the shell through bearings, the motor shaft is connected with the differential mechanism through a speed reducer gear set, the shell is connected with a main axle housing, and the motor, a primary driving gear, a secondary driven gear and the differential mechanism are arranged in a main axle housing mounting cavity. The motor shaft is a hollow shaft, one end of the left-end half shaft penetrates through the motor shaft to be connected with a differential mechanism left half shaft bevel gear, and one end of the right-end half shaft is connected with a differential mechanism right half shaft bevel gear.

The invention provides a cam, a wave generator and a harmonic reducer, the cam comprises a cam body, grooves are formed in the circumferential side face of the cam body, and the grooves are continuously or intermittently distributed in the circumferential direction of the cam body; the length of the cam body in the axial direction is H, the width W of any groove in the axial direction of the cam body meets the condition that W / H is larger than or equal to 0.15 and smaller than or equal to 0.3, and after the cam is matched with the flexible bearing, buffer spaces capable of providing elastic deformation and absorbing vibration are formed in the grooves. According to the harmonic reducer, the cam with the groove and the width meeting the design range is designed and constructed in the peripheral side face, the balance weight of the cam is reduced, the contact area between the cam and the flexible bearing is reduced, in the operation process of the harmonic reducer, a buffer space for providing elastic deformation and absorbing vibration can be formed in the groove with a certain span in the axial direction, and the service life of the harmonic reducer is prolonged. Load distribution of the harmonic reducer in the operation process is more uniform, and high-speed, low-noise and small-vibration operation of the harmonic reducer is facilitated.

The invention relates to the technical field of robots, in particular to a planetary speed reduction joint module and a robot with the same, and the planetary speed reduction joint module comprises a motor assembly, a planetary speed reducer assembly, a front end cover, a rear end cover and an output flange cover plate; wherein the motor assembly comprises a shell and a motor rotating shaft; the planetary reducer assembly comprises an inner gear ring, a sun gear, a planet carrier and a plurality of planet gear sets, each planet gear set comprises a first-stage planet gear and a second-stage planet gear which are coaxially and fixedly connected, the inner gear ring is fixedly connected with the shell, the sun gear is coaxial and fixedly connected with a motor rotating shaft, the planet gear sets are rotationally connected to the planet carrier, the first-stage planet gears are meshed with the sun gears, and the second-stage planet gears are meshed with the second-stage planet gears. The secondary planet gear is meshed with the inner gear ring; the output flange cover plate is rotationally connected to the front end cover and fixedly connected to the planet carrier. Sealing assemblies are arranged between the rotating shaft and the shell as well as between the shell and the assembly; the motor rotating shaft and the planet carrier are respectively provided with a detection assembly. The invention has the characteristics of compact structure, small volume and light weight.

The invention discloses a double-stator single-rotor planetary reduction type joint module which comprises a hollow shaft, a driver assembly, an axial magnetic flux motor, a planetary reducer and an output shaft, and the driver assembly, the axial magnetic flux motor and the planetary reducer are sequentially arranged on the hollow shaft in the axial direction; the axial magnetic flux motor comprises a rotor assembly and two stator assemblies. The two stator assemblies are symmetrically arranged on the two different sides of the rotor assembly in the axial direction. The rotor assembly comprises a rotor supporting plate and a plurality of magnetic steels, and the plurality of magnetic steels are circumferentially distributed on the rotor supporting plate; the stator assembly comprises a stator iron core and a plurality of stator windings, the stator iron core comprises a yoke part iron core and a plurality of tooth part iron cores, and each stator winding is wound on the corresponding tooth part iron core. According to the joint module, wiring can be facilitated, the integration level can be improved, the torque density of the joint module is effectively improved, and the heat dissipation performance is good.

The invention relates to a directional deflection diagonal plane deflection joint with a single driving source, which belongs to the technical field of deflection mechanisms capable of moving in multiple dimensions and comprises a first clutch, a second clutch, a transmission shaft, a clutch supporting structure, a planetary gear train, a planetary gear train transmission structure, a speed reducer, an upper diagonal plane mechanism, a lower diagonal plane mechanism, a universal joint, a driving motor and a bearing. Through the cooperation of different clutches, the upper part and the lower part of the joint can rotate in different directions and at different speeds or move in the same way, through the movement of different parts, the deflection action of the system in space is realized, the multi-dimensional movement space of the mechanism is realized, the number of driving sources is reduced, and the total weight of the system is further reduced.

According to the collision detection method for the high-reduction-ratio and large-load mechanical arm, the problems of sensitivity and reliability of collision detection of the high-reduction-ratio mechanical arm are solved by combining a two-stage detection mechanism with tail end vibration characteristics and joint torque errors; according to the first-stage detection, tail end vibration signals are captured in real time through a three-axis acceleration sensor, and rapid recognition of slight collision is achieved; in the second-stage detection, joint torque errors are calculated based on current feedback, the nonlinear effect of the speed reducer is compensated in combination with a kinetic model, and the accuracy of violent collision detection is improved. High-precision collision identification and multi-level safety control of the mechanical arm and an external object under the heavy load working condition are achieved, and meanwhile the anti-interference capacity and reliability of a detection system under the complex working condition are improved.

The utility model discloses a planetary disc type joint module and a robot with the same, the planetary disc type joint module comprises a shell, a planetary reducer assembly, a motor assembly and an electrical cabin, the planetary reducer assembly, the motor assembly and the electrical cabin are arranged in the shell, a hollow shaft and an inner gear ring are arranged in the shell, and the planetary reducer assembly and the motor assembly are arranged in a nested mode; an output end magnetic ring and a motor end magnetic ring are arranged on the hollow shaft, the two magnetic rings are installed in an embedded mode, signals of the two magnetic rings can be detected through one code disc reading head, and the motion of the output end of the planetary reducer assembly is transmitted to an electric cabin of the joint through the hollow shaft. The signals of the motor end and the output end can be detected at the same time without additionally installing an output end encoder assembly, and the control precision of the joint output end is improved; the planetary reducer assembly adopts multi-stage speed reduction, the speed reduction ratio is large, the torque density of the joint is high, the rotational inertia is small, and the overall integration degree is high.

The invention provides a robot joint module in the technical field of robot manufacturing. The robot joint module comprises a motor assembly, a harmonic speed reducer assembly and an encoder assembly. The double-rigid-gear harmonic speed reducer and the outer rotor motor are adopted, the motor is embedded into a flexible gear of the harmonic speed reducer, the axial length of the joint module is effectively shortened, and the radial size is reduced; the motor rotor is elliptical and is in contact with the inner ring of the flexible bearing, and the outer ring of the flexible bearing is in contact with the inner ring of the flexible gear of the harmonic speed reducer, so that the motor rotor shell and the flexible bearing jointly serve as a harmonic generator, and meanwhile, the motor stator shell and the harmonic speed reducer shell are integrally designed, so that the number of parts is reduced; the rotor end cover, the rotor rotating shaft, the output flange and the output shaft are all integrally designed into hollow shafts, and the output hollow shaft of the output flange is arranged in the rotor hollow shaft, so that cables can be arranged in the module. The integrated design of motor parts and harmonic reducer parts has the cost advantage in the aspects of manufacturing and maintenance.

The embodiment of the invention discloses a harmonic reducer, a mechanical arm and cleaning equipment, the harmonic reducer comprises a flexible gear, a connecting part and an output part, in the manufacturing process of the harmonic reducer, the protruding connecting part is formed on the surface of the flexible gear, production and machining of the flexible gear and the connecting part are more convenient, the machining precision can be improved, and the machining efficiency is improved. For example, the flexible gear and the connecting part which are integrally formed can be manufactured through an injection molding process, a connecting hole process in the traditional technology is replaced, the probability of deformation of the connecting part can be reduced or eradicated, and then the transmission precision of the harmonic reducer is guaranteed. In the assembling process, the output part is connected with the flexible gear through the connecting part, the connecting part protrudes out of the surface of the flexible gear, at least part of the connecting part can stretch into the output part, or at least part of components of the output part are arranged on the connecting part in a sleeving mode, and therefore rapid assembling of the output part and the connecting part can be facilitated; and the output part is conveniently connected with the flexible gear.

An oil-cooled powertrain (10) and an electric vehicle (1). The oil-cooled powertrain (10) comprises a reducer (300), a motor (100) and an oil pipe (340). The reducer (300) comprises a reducer input shaft (330), the motor (100) comprises a motor shaft (140), the reducer input shaft (330) is fixedly connected to the motor shaft (140), and the motor shaft (140) is used for transmitting power to the reducer input shaft (330). The reducer input shaft (330) comprises a reducer shaft cavity (331), the reducer shaft cavity (331) is used for accommodating the oil pipe (340) and part of the motor shaft (140), the oil pipe (340) is relatively fixed to the reducer input shaft (330), the motor shaft (140) comprises a motor shaft cavity (143), and the oil pipe (340) is used for conveying coolant oil to the motor shaft cavity (143). Along the shaft direction of the motor (100), the reducer shaft cavity (331) runs through the reducer input shaft (330), and the motor shaft cavity (143) runs through the motor shaft (140). The oil pipe (340) and the motor shaft (140) are arranged in the shaft direction of the motor (100), and the oil pipe (340) is communicated with the motor shaft cavity (143). By providing the oil pipe (340) in the reducer shaft cavity (331), the coolant oil is conveyed from the reducer (300) to the motor (100), so that the coverage range of the coolant oil in the oil-cooled powertrain (10) is expanded, and the cooling efficiency can be improved.