CN214337732U - Flexible motor - Google Patents

Abstract

The utility model provides a flexible motor, which solves the technical problems that the prior motor is easy to block when being started or overloaded, the time is too long and even the motor is burnt; the motor comprises a motor shell, wherein a motor end cover is arranged at the front end of the motor shell, a motor electromagnetic main body is arranged at the rear end inside the motor shell, a motor inner end cover is arranged at the middle position inside the motor shell, and a motor outer side inner cavity is arranged at the position, close to the motor end cover, of the front end inside the motor shell; the output end of the motor electromagnetic main body is provided with a motor rotor output shaft, the motor rotor output shaft is rotationally connected with the inner end cover of the motor, and the motor rotor output shaft is fixedly connected with the transmission shell. The utility model relates to an integration flexible motor, the customer need not consider the start-up and the overload difficult problem of motor during the lectotype, can the self-adaptation regulation of full play flexible motor start-up, operation and overload, gives play to the optimal performance and the maximum efficiency of motor, can the safe operation of automatic protection motor again.

Description

Flexible motor

Technical Field

The utility model relates to a motor especially relates to a flexible motor.

Background

The motor is used as an electromagnetic mechanical device for electromechanical energy conversion, is widely applied to various occasions of power transmission, corresponds to a certain characteristic curve for motors with various specifications, has a relatively stable boundary range, and has the following main boundaries:

(1) current maximum and large current duration, voltage maximum and high voltage duration, torque maximum and large torque duration for the start-up state.

(2) Current range and voltage range in the rated state.

(3) Maximum current and high current durations, maximum voltage and high voltage durations, maximum torque and high torque durations for locked rotor conditions.

When the motor is started and overloaded, the motor is easy to approach or exceed the boundary of the maximum value of the motor characteristic, the motor can be blocked, the time is too long, and even the motor is burnt, so that the energy waste phenomenon of the large horse-drawn trolley caused by over-power model selection is very common in application.

In order to solve the problem that the motor does not exceed the inherent characteristic boundary in the operation process, a plurality of technologies are applied to the starting of the motor at present, including an electric control starting technology and a mechanical soft starting technology.

The existing electric control starting technology mostly sacrifices the performance of the motor, prolongs the starting time to solve the problem of motor starting, is difficult to solve the problem of overload locked rotor after rated operation, has high cost of a control system and high technical difficulty of solving the overload locked rotor, is difficult to simultaneously solve the two problems of starting and overload due to large characteristic and cost difference of different electric control starting technologies, is difficult to be combined with the motor into an integrated motor product, is difficult to form a serialized motor product, and brings inconvenience to engineering application design and field operation.

The existing mechanical soft start technology mainly comprises a hydraulic coupling technology and a magnetic coupling technology of the traditional Fisher principle, the two technologies have the problems of large volume caused by low power density and theoretical power loss of slip in rated operation, in order to improve the transmission efficiency of rated working conditions, after the start is finished, the idle power loss is reduced by reducing the slip or locking 0 slip as much as possible in a control mode, but simultaneously, overload torque can be quickly transmitted back to a motor in overload, even if the slip is expanded by a control means in overload, the slip is difficult to expand in a short time of transmission between force and force, the overload can also cause the technical problems of motor stalling and even burning, and the cost of a system participating in the control is high and the technical difficulty is high. The above characteristics of the mechanical soft start technology are difficult to be integrated with the motor to form an integral motor product, and a serialized motor product is difficult to form, so that inconvenience is brought to engineering application design and field operation.

SUMMERY OF THE UTILITY MODEL

The utility model discloses hardly solve simultaneously start-up and overload lock-rotor difficult problem to current motor technology, the big horse that the overpower lectotype caused draws dolly energy waste phenomenon seriously, different processing technology causes control system with high costs and the technical degree of difficulty is high, hardly synthesize with the motor and become integration, standardized motor product, the technical problem who brings inconvenience for engineering application design and field operation, provide one kind under the condition of carrying the start, the motor is in the light load and is similar to the operating mode that no-load starts even, can full play the startability of motor self, reduce motor area year start current by a wide margin, there is not driven slip power loss under rated drive state, self-adaptation moment limit does not surpass motor lock-rotor scope under overload state, can effectively protect the motor in the operating of the characteristic curve within range of its design, normal lectotype, no control system's, Self-adaptive, electromechanical synthesis integrated flexible motor.

Therefore, the technical scheme of the utility model is that the flexible motor comprises a motor shell, wherein the front end of the motor shell is provided with a motor end cover, the rear end inside the motor shell is provided with a motor electromagnetic main body, the middle position inside the motor shell is provided with a motor inner end cover, and the front end inside the motor shell, which is close to the motor end cover, is provided with a motor outer cavity; the output end of the motor electromagnetic main body is provided with a motor rotor output shaft, and the motor rotor output shaft is rotationally connected with an inner end cover of the motor;

the output end of the output shaft of the motor rotor is provided with a continuously variable transmission, the continuously variable transmission is positioned in the inner cavity outside the motor and comprises a transmission shell, the inner cavity inside the transmission shell is provided with a transmission inner cavity, oil is arranged in the transmission inner cavity, one end of the transmission shell is provided with a motor output shaft, the motor output shaft penetrates through the transmission shell and enters the transmission inner cavity, the motor output shaft is rotatably connected with the transmission shell, the motor output shaft positioned in the transmission inner cavity is fixedly provided with a transmission sun wheel, the outer circumference of the transmission sun wheel is provided with a transmission planet wheel assembly, the transmission planet wheel assembly is composed of a plurality of transmission planet wheels, the transmission planet wheels are rotatably fixed on the inner wall of the transmission shell, the plurality of transmission planet wheels are respectively meshed with the transmission sun wheel, and the outer side of the transmission planet wheel assembly is fixedly provided with a transmission bucket wheel assembly, the transmission bucket wheel assembly consists of a plurality of transmission bucket wheels, and the transmission bucket wheels are fixedly connected with the transmission planet wheels; the output shaft of the motor rotor is fixedly connected with the transmission shell; the motor output shaft is rotationally connected with the motor end cover.

Preferably, the motor end cover is connected with the motor outer shell through screws.

Preferably, the output shaft of the motor rotor is splined to the transmission housing.

The utility model has the advantages that because the output end of the motor rotor output shaft of the flexible motor is provided with the stepless speed changer, the flexible starting characteristic of the stepless speed changer reduces the load at the initial starting stage of the motor, under the condition of loaded starting, the motor rotor output shaft is in light load or even similar to the working condition of no-load starting, the starting performance of the motor can be fully exerted, the loaded starting current of the motor can be greatly reduced, the power loss of the slip of the transmission is avoided under the rated transmission state, the self-adaptive torque limit does not exceed the motor stalling range under the overload state, the motor can be effectively protected to run in the designed characteristic curve range, the non-control system is realized, the whole process self-adaptive operation is realized, the integrated integral structure of electromechanical synthesis is realized, when the engineering application design and the field operation, the starting and the overload of the motor are not required to be considered, the load according to the running working condition is normally selected, the method brings convenience to design and field operation, and has the advantages of great type selection, energy conservation and matched cost reduction.

Drawings

Fig. 1 is a schematic three-dimensional structure of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 1;

FIG. 4 is an enlarged view at X of FIG. 3;

FIG. 5 is a cross-sectional view N-N of FIG. 3;

FIG. 6 is a comparison graph of on-load starting currents of a conventional motor and a flexible motor under the same working condition;

fig. 7 is a characteristic graph of the flexible motor.

Description of the symbols in the drawings

1. A motor outer housing; 101. an output shaft of the motor rotor; 102. a motor electromagnetic body; 103. a motor end cover; 104. an inner cavity outside the motor; 105. an inner end cover of the motor; 2. a continuously variable transmission; 201. a transmission housing; 202. an output shaft of the motor; 203. a transmission planet wheel; 204. a transmission sun gear; 205. a transmission planet wheel assembly; 206. a transmission bucket wheel; 207. a transmission inner cavity; 208. transmission bucket wheel assembly.

Detailed Description

The present invention will be further described with reference to the following examples.

Fig. 1-7 show an embodiment of the flexible motor of the present invention, which can be seen in the figure, and includes a motor housing 1, a motor end cover 103 is disposed at the front end of the motor housing 1, a motor electromagnetic main body 102 is disposed at the rear end of the motor housing 1, a motor inner end cover 105 is disposed at the middle position of the motor housing 1, and a motor inner cavity 104 is disposed at the position close to the motor end cover 103 at the front end of the motor housing 1.

As can be seen in fig. 4, the output end of the electromagnetic body 102 of the motor is provided with a motor rotor output shaft 101, and the motor rotor output shaft 101 is rotatably connected with an inner end cover 105 of the motor; the output end of the motor rotor output shaft 101 is provided with a continuously variable transmission 2, the continuously variable transmission 2 is positioned in the motor outer inner cavity 104, the continuously variable transmission 2 comprises a transmission housing 201, a transmission inner cavity 207 is arranged inside the transmission housing 201, oil is arranged in the transmission inner cavity 207, one end of the transmission housing 201 is provided with a motor output shaft 202, the motor output shaft 202 penetrates through the transmission housing 201 and enters the transmission inner cavity 207, the motor output shaft 202 is rotatably connected with the transmission housing 201, a transmission sun gear 204 is fixedly arranged on the motor output shaft 202 positioned in the transmission inner cavity 207, a transmission planet gear assembly 205 is arranged on the outer circumference of the transmission sun gear 204, the transmission planet gear assembly 205 is composed of a plurality of transmission planet gears 203, the transmission planet gears 203 are rotatably fixed on the inner wall of the transmission housing 201, and the plurality of transmission planet gears 203 are respectively meshed with the transmission sun gear 204, a transmission bucket wheel assembly 208 is fixedly arranged on the outer side of the transmission planetary wheel assembly 205, the transmission bucket wheel assembly 208 is composed of a plurality of transmission bucket wheels 206, and the transmission bucket wheels 206 are fixedly connected with the transmission planetary wheels 203; the motor rotor output shaft 101 is fixedly connected with the transmission shell 201; the motor output shaft 202 is rotatably connected with the motor end cover 103.

The motor output shaft 202 of this embodiment can be directly connected with a device to be driven, or the tail end of the motor output shaft 202 can be made into a mounting hole form, a power shaft to be connected and driven can be connected with the mounting hole, the mounting hole can be in various forms including a spline hole, a hexagonal inner hole or a quadrangular inner hole, and the like, so that the outer end face of the motor output shaft 202 can be arranged to be flush with the outer surface of the motor end cover 103 or not to exceed the outer surface of the motor end cover 103, the convenience of connection is further improved, and the motor output shaft is suitable for various connection modes and scenes and is convenient to use.

In this embodiment, motor end cover 103 passes through bolted connection with motor housing body 1, and convenient the dismantlement also can adopt other fixed connection modes.

In the technical scheme of the embodiment, the motor output shaft 202 is connected with the transmission sun gear 204 through a spline, so that the reliability is high, the service life is long, and other rigid connection modes can be adopted.

In the technical scheme of the embodiment, the power of the motor is transmitted to the transmission shell 201 through the motor rotor output shaft 101, then the power is transmitted to the transmission sun gear 204 through the planetary gear assembly 205 and the transmission bucket wheel assembly 208, and finally transmitted to the motor output shaft 202, so that the power transmission is realized, and the starting characteristic of the motor can be optimized by starting the flexible motor.

The flexible starting method of the flexible motor of the embodiment comprises the following steps:

(1) electrifying the motor and starting the motor;

(2) the motor rotor output shaft 101 drives the transmission shell 201 to rotate, and at the initial starting stage, the motor output shaft 202 connected with a load is immobile, and the transmission sun gear 204 fixedly connected with the motor output shaft 202 is immobile;

(3) the transmission shell 201 drives the transmission planet wheel 203 to revolve around the transmission sun wheel 204, meanwhile, the transmission planet wheel 203 rotates, the transmission bucket wheel 206 fixedly connected with the transmission planet wheel 203 rotates, the transmission bucket wheel 206 stirs oil in the transmission inner cavity 207, at the moment, the oil in the transmission inner cavity 207 forms stirring resistance in the circumferential direction of the transmission bucket wheel 206, the stirring resistance is related to the rotation speed of the transmission bucket wheel 206 and the revolution speed of the transmission shell 201, the stirring resistance is small at the beginning, and the motor is started under light load;

(4) along with the increase of the rotating speed of the motor rotor output shaft 101, the stirring resistance formed by the oil in the transmission inner cavity 207 in the circumferential direction of the transmission bucket wheel 206 is increased, the stirring resistance is acted on the meshed transmission sun wheel 204 through the transmission planet wheel 203 and acted on the motor output shaft 202, and after the load resistance connected with the motor output shaft 202 is broken through, the transmission planet wheel 203 drives the transmission sun wheel 204 and the motor output shaft 202 to start rotating;

(5) the rotation speed of the transmission planet wheels 203 starts to be reduced along with the gradual increase of the rotation speed of the transmission sun wheel 204, the rotation speed of the transmission sun wheel 204 gradually approaches the rotation speed of the transmission shell 201, after the rotation speed of the transmission planet wheels 203 starts to be reduced, the speed of stirring oil by the transmission bucket wheel 206 starts to be reduced, but the centrifugal force of the oil in the transmission inner cavity 207 is increased along with the increase of the rotation speed of the transmission shell 201, finally, the rotation speed of the transmission planet wheels 203 is reduced to 0, the transmission sun wheel 204 and the transmission shell 201 are in constant-speed synchronous transmission, the centrifugal force of the oil in the transmission inner cavity 207 becomes balance force which keeps the transmission planet wheels 203 and the transmission sun wheel 204 meshed but not rotating through the transmission bucket wheel 206, the rotation speed of the motor rotor output shaft 101 is synchronously transmitted to the motor output shaft 202, and constant-speed smooth output is realized;

(6) when the load fluctuates and is overloaded or the motor is regulated and controlled, the changed external force breaks the balance force which keeps the transmission planet wheel 203 and the transmission sun wheel 204 meshed but not rotated, the transmission planet wheel 203 and the transmission sun wheel 204 start to be meshed and rotated, oil in the inner cavity 207 of the transmission forms stirring in the circumferential direction of the transmission bucket wheel 206, the motor output shaft 202 and the motor rotor output shaft 101 are in unequal-speed transmission, and part of overload torque is flexibly released through the oil;

when the load is continuously the overload torque, the transmission bucket wheel 206 continuously stirs the oil, and the continuously variable transmission 2 continuously repeats the process of the step (5) until the balance is reached again, and the constant-speed stable output is recovered.

Because the output end of the motor rotor output shaft 101 is provided with the stepless speed changer 2, the starting load of the motor can be reduced by the flexible starting characteristic of the stepless speed changer 2, the motor is started under the condition that the motor output shaft 202 is fixedly connected with the load, the motor rotor output shaft 101 is in the working condition of light load or even similar to no-load starting, the starting performance of the motor can be fully exerted, the loaded starting current of the motor is greatly reduced, the power loss of the slip of the transmission is avoided under the rated transmission state, the self-adaptive torque limit does not exceed the motor stalling range under the overload state, and the motor can be effectively protected from running within the designed characteristic curve range.

Fig. 6 is a comparison diagram of the loaded starting current of the conventional motor and the flexible motor of the embodiment under the same working condition, wherein a curve 1-1 is a starting current curve of the conventional motor, a curve 1-2 is a starting current curve of the motor of the embodiment, the two curves are test comparisons performed under the same working condition, wherein the value of a vertical axis is a current parameter of the tested motor, and the data comparison between the embodiment and the conventional motor in the diagram is as follows:

(1) the starting maximum current is reduced by 32%;

(2) the whole starting process saves energy by 44%;

(3) the high current maintenance time is shortened by 50%;

(4) the rated working current values are equal, and the transmission efficiency is close to 100%.

Compared with the traditional motor, the motor starting performance can be greatly improved, the motor starting power consumption can be reduced, the rated working condition has no transmission power loss, and the service life of the motor is prolonged.

Fig. 7 is a characteristic curve of the embodiment, three curves in fig. 7 are respectively a test curve of the embodiment of the present invention, a curve 2-1 is a curve of an output torque of the motor output shaft 202 in a range from 0 to 3000rpm, a curve 2-2 is a curve of a transmission ratio of the motor rotor output shaft 101 to the motor output shaft 202 in a range from 0 to 3000rpm of the rotation speed of the motor rotor output shaft 101, a curve 2-3 is a curve of a transmission efficiency of the motor rotor output shaft 101 to the motor output shaft 202 in a range from 0 to 3000rpm of the rotation speed of the motor rotor output shaft 101, the test curve is a characteristic curve test performed under a condition of a fixed connection load, and a complete transmission process from starting to rated operation is performed when the rotation speed of the motor rotor output shaft 101 is in a range from 0 to 3000 rpm.

The following characteristics of the transmission of the continuously variable transmission can be seen in the measured characteristic curve in fig. 7:

(1) 0 speed 0 torque at start up;

(2) the ratio of the rotating speed of the motor output shaft 202 to the rotating speed of the motor rotor output shaft 101 is a transmission ratio i, and the curve of the transmission ratio is the whole process of linear change of 0-1;

(3) the curve of the torque M of the motor output shaft 202 is linear 0-highest point-rated torque;

(4) the power ratio of the motor output shaft 202 to the motor rotor output shaft 101 is efficiency eta, and the curve is a linear whole process of 0-100%;

(5) under a rated working condition, the rotating speeds of the motor rotor output shaft 101 and the motor output shaft 202 are completely the same, and 1:1 synchronous transmission is performed;

(6) the whole process realizes the whole process of 0-1, self-adaption and flexible transmission.

The flexible motor of the present embodiment is illustrated to have the following capabilities:

(1) when the speed is changed, the inner part of the stepless speed changer 2 of the flexible motor works, the transmission efficiency is converted between 0 percent and 100 percent, and the linear excellent speed change performance is realized;

(2) when the speed is constant, the interior of the continuously variable transmission 2 of the flexible motor does not work, the motor rotor output shaft 101 and the motor output shaft 202 are in constant-speed transmission, the transmission efficiency is close to 100%, and the energy-saving capacity is huge;

(3) when the speed is constant, the continuously variable transmission 2 of the flexible motor has the speed change capability at any time, and as long as the external conditions change, the self-adaptive conversion from constant speed to speed change can be realized instantly when the balance force which keeps the transmission planet wheel 203 and the transmission sun wheel 204 meshed but not rotating is broken through, and the moment is the change time of acting force and reacting force;

(4) during speed change, the continuously variable transmission 2 of the flexible motor tends to be constant speed at any time, and self-adaptive conversion from speed change to constant speed can be realized as long as conditions are met.

The characteristics are suitable for matching various motors with different powers with different continuously variable transmissions, the transmission power of the continuously variable transmission and the motors with different powers form a matching relationship to form an integral structure, the combination of the motors and the continuously variable transmissions is realized, the integral structure is structurally formed, the serialized specifications are formed on the power, the matched continuously variable transmission with each power realizes the optimization of the characteristic curve of the motors, the flexible motors with better characteristic curves are formed, and the serialized products of the flexible motors are simultaneously formed.

The flexible motor of the embodiment realizes flexible starting, the performance of the motor is fully exerted during starting without sacrificing the performance of the motor, the motor is started under light load or approximately zero load, the starting efficiency is high, the starting time is not prolonged, the rated running state is quickly reached, the transmission power loss of the continuously variable transmission 2 is avoided in the rated running state, and meanwhile, if the overload locked-rotor working condition occurs after the rated running, the continuously variable transmission 2 can absorb the overload load to protect the normal running of the motor. The technical scheme of the embodiment is low in manufacturing cost, and is easy to integrate to form an integrated motor series, and a user can directly purchase flexible motors with various specifications to realize application of various scenes.

Compared with the electric control starting technology and the mechanical soft starting technology, the stepless speed changer in the technical scheme of the flexible motor of the embodiment is an indispensable part of the structural scheme of the flexible integrated motor, forms the integrated flexible motor, the characteristic parameters of the flexible motor are optimized to the maximum extent, no complex control link exists, the flexible motor of the embodiment cannot exceed the inherent characteristic boundary in the operation, the running state of the motor is protected during starting, running and overload, the service life and the reliability of the motor are improved, the low cost of the flexible motor is convenient for selecting various scenes, when the flexible motor is started and overloaded, the motor electromagnetic main body 102 can not be locked, overloaded for a long time or fluctuated in load, and the motor electromagnetic main body 102 can not be burnt, when the flexible motor runs at rated speed, almost no transmission efficiency loss of the stepless speed changer exists, and great convenience is brought to engineering application design and field operation.

The motor selected in the embodiment can be motors in various forms, including a three-phase asynchronous motor, a permanent magnet motor, a synchronous motor and the like.

In this embodiment, the inside front end of the motor outer casing 1 is provided with the inner cavity 104 outside the motor near the motor end cover 103, the continuously variable transmission 2 is arranged in the inner cavity 104 outside the motor, the whole motor is an integrated flexible motor, and the motor output shaft 202 can be directly connected with a load, because the continuously variable transmission 2 is arranged in the flexible motor, the starting and running requirements for the motor are reduced when the motor is selected, and the improvement of the starting, overload and running conditions of the motor electromagnetic main body 102 of the traditional motor is realized.

Because the stepless speed changer 2 is arranged in the integrated flexible motor, the problem that engineers often select large motor power for smooth starting and overload resistance of the motor when the traditional motor is selected is solved, the motor is started easily, and the long-time overload running capability of the motor is improved; the integrated flexible motor has good light-load starting and overload resistance, greatly improves the transmission efficiency of the electromagnetic main body power of the motor due to the existence of the continuously variable transmission when running under rated working conditions, has extremely low power loss, and realizes energy conservation and consumption reduction.

The technical scheme of the integrated flexible motor provided by the embodiment solves the problem that the traditional motor is often close to or surpasses the inherent characteristic boundary in starting and running, and does not need to add an electromagnetic control technology and a mechanical soft starting technology on the basis of the traditional motor, so that the application cost of the motor is reduced; the fixed transmission efficiency loss in the operation of the mechanical soft start technology is avoided, and a large amount of energy is saved; the model is normally selected according to the actual working condition, the phenomenon that a big horse pulls a small car is avoided, and energy conservation and consumption reduction are realized; the flexible transmission of the whole process improves the service life and the running stability of the motor.

The control of the start and the operation of the traditional motor comprises the step of realizing start through electronic control, the step of realizing start and operation through traditional hydraulic coupling and magnetic coupling, the step of realizing start and operation through adding a control system on the basis of hydraulic coupling and magnetic coupling, the three modes are all for improving the start and the operation performance of the traditional motor, but the problems of start, overload and rated transmission efficiency of the motor are difficult to solve simultaneously, the problems are often considered, especially, a hydraulic coupler, a magnetic coupler and a control system are added outside the traditional motor, the size is large, the motor is mostly in a split structure, and the motor is difficult to form a flexible motor with an independent integrated structure.

However, in the technical scheme of the embodiment, the motor outer side inner cavity 104 is arranged at the front end inside the motor outer shell 1 close to the motor end cover 103, the continuously variable transmission 2 is arranged in the motor outer side inner cavity 104, so that an integrated flexible motor is formed, the light-load starting of the motor can be easily realized without increasing an electronic control technology, the motor can be automatically adjusted to avoid exceeding the inherent characteristic boundary of the motor electromagnetic main body 102 during overload, the independent flexible motor with an integrated structure is formed without increasing a complex electronic control technology, the motor is a novel flexible motor, the serialization of power can be formed, when in application, a client can directly realize the conventional model selection of the motor, the starting and overload problems of the motor do not need to be considered, the motor is directly applied to various power transmission occasions, and the self-adaptive adjustment of the starting, running and overload of the flexible motor can be fully exerted, the optimal performance and the highest efficiency of the motor electromagnetic main body 102 are exerted, and the whole process safe operation of the motor electromagnetic main body 102 can be automatically protected.

However, the above description is only an embodiment of the present invention, and the scope of the present invention should not be limited thereto, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.

Claims (3)

1. The utility model provides a flexible motor, includes motor housing body, characterized by: the motor comprises a motor shell and is characterized in that a motor end cover is arranged at the front end of the motor shell, a motor electromagnetic main body is arranged at the rear end of the interior of the motor shell, a motor inner end cover is arranged at the middle position of the interior of the motor shell, and a motor outer-side inner cavity is arranged at the position, close to the motor end cover, of the front end of the interior of the motor shell; the output end of the motor electromagnetic main body is provided with a motor rotor output shaft, and the motor rotor output shaft is rotationally connected with an inner end cover of the motor;

the output of motor rotor output shaft is equipped with buncher, buncher is arranged in the cavity of motor outside, buncher includes the derailleur casing, the inside of derailleur casing is equipped with the cavity in the derailleur, be equipped with fluid in the cavity in the derailleur, the one end of derailleur casing is equipped with motor output shaft, motor output shaft runs through and enters into the cavity in the derailleur through the derailleur casing, motor output shaft and derailleur casing swivelling joint, be located the fixed derailleur sun gear that is equipped with on the motor output shaft in the cavity in the derailleur, be equipped with derailleur planet wheel subassembly on the outer circumference of derailleur sun gear, derailleur planet wheel subassembly comprises a plurality of derailleur planet wheels, the rotatory fixing of derailleur planet wheel is on the inner wall of derailleur casing, a plurality of derailleur planet wheels mesh with derailleur sun gear respectively and are connected, a transmission bucket wheel assembly is fixedly arranged on the outer side of the transmission planetary wheel assembly, the transmission bucket wheel assembly is composed of a plurality of transmission bucket wheels, and the transmission bucket wheels are fixedly connected with the transmission planetary wheels; the output shaft of the motor rotor is fixedly connected with the transmission shell; and the motor output shaft is rotationally connected with the motor end cover.

2. A flexible electric machine according to claim 1, wherein: the motor end cover is connected with the motor outer shell through screws.

3. A flexible electric machine according to claim 1, wherein: and the output shaft of the motor rotor is connected with the transmission shell through a spline.

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