Electromagnetic double-clutch type power mechanism

Abstract

The utility model discloses an electromagnetic double clutch type power mechanism, which comprises a motor and an electromagnetic transmission mechanism, the structure of the electromagnetic transmission mechanism comprises a fixing ring, two electromagnetic coils are arranged on the fixing ring in parallel, an armature is fixedly arranged on the outer side of each of two opposite ends in the axial direction of the fixing ring, and a clutch outer core is axially fixed with the fixing ring. A fast-gear clutch assembly and a slow-gear clutch assembly are arranged in the clutch outer core side by side in a circumferential transmission mode, and an inner shifting structure acting on the fast-gear clutch assembly and the slow-gear clutch assembly is arranged in the clutch outer core. A fast gear and slow gear transmission set in transmission connection with the transmission shaft is arranged in the clutch outer core and used for achieving fast gear and slow gear switching transmission. And the electromagnetic force of the two electromagnetic coils realizes the axial sliding of the clutch outer core, so that the fast-gear clutch assembly and the slow-gear clutch assembly are staggered for separation and reunion.

Description

TECHNICAL FIELD

[0001] The utility model relates to a power mechanism, in particular to an electromagnetic double-clutch type power mechanism applied to a wheeled motor vehicle. BACKGROUND

[0002] Wheeled vehicles are divided into two-wheeled vehicles, three-wheeled vehicles and four-wheeled vehicles according to the number of wheels. For rear-drive three-wheeled vehicles and four-wheeled vehicles, a rear axle assembly is generally required to be arranged on the two types of vehicles to provide rear-drive power for the vehicles. In order to adapt to different working conditions of the vehicles during driving, a double-clutch transmission mechanism is usually arranged in the rear axle assembly. The conventional double-clutch transmission mechanism generally uses hydraulic oil as the working medium. The driving components of the hydraulic double-clutch transmission mainly rely on a complex hydraulic system to realize the control and gear shifting operation of the clutch. The hydraulic system includes a hydraulic pump, a hydraulic valve, an oil pipe and other components. These components not only occupy a large space, but also increase the complexity and maintenance cost of the system.

[0003] Chinese patent document (publication number: CN 216382431U) discloses a two-gear automatic transmission shaft based on an electromagnetic clutch, a power box and an electric vehicle. The transmission shaft includes a low-speed gear driven gear and a high-speed gear driven gear which are rotatably arranged on an output shaft. A bidirectional spiral overrunning clutch structure is formed between the low-speed gear driven gear and the output shaft. A synchronizer is arranged between the high-speed gear driven gear and the output shaft. The synchronizer is connected to the output shaft through a spline fitting structure and can be axially moved. The synchronizer is also connected to an electromagnetic clutch. The electromagnetic clutch is used for the combination and separation control of the synchronizer and the high-speed gear driven gear. The power box includes the aforementioned two-gear transmission shaft and a differential assembly. The electric vehicle has the aforementioned power box. The utility model has the beneficial effects that the transmission shaft combines with the bidirectional overrunning clutch through the electromagnetic clutch to form three gears of high-speed forward rotation and low-speed reverse rotation, the gear shifting operation is convenient, and the running noise is low. The power box has the same excellent characteristics as the aforementioned transmission shaft. The electric vehicle has an electronic parking function to prevent hill sliding.

[0004] The corresponding structure in the power box is not reasonable, the overall compactness of the structure is not good, thereby bringing relatively large volume and weight of the overall power box, inconvenient setting and increasing the power consumption of the vehicle driving. UTILITY MODEL CONTENTS

[0005] The utility model needs to solve the technical problem: provide a kind of electromagnetic double-clutch type power mechanism, its compactness of structure is good, and the space occupied is small.

[0006] To solve the technical problem, the utility model discloses a technical scheme of an electromagnetic double clutch type power mechanism, which comprises a motor and an electromagnetic clutch type transmission mechanism, characterized in that the electromagnetic clutch type transmission mechanism comprises a fixed ring that can move axially, two electromagnetic coils arranged side by side on the fixed ring, and one armature fixedly arranged on the outer side of each of the opposite ends of the fixed ring in the axial direction.

[0007] The cylindrical clutch outer core is axially fixed with the fixed ring, axially slidably connected with the motor shaft in a relative circumferential fixed manner, and rotatable relative to the fixed ring under the drive of the motor shaft. The fast gear and the slow gear are arranged side by side in the clutch outer core, and the clutch outer core is circumferentially connected with the fast gear and the slow gear. The inner shifting structure is axially fixed in the clutch outer core and is used for axially acting on the fast gear and the slow gear under the drive of the clutch outer core.

[0008] The fast shaft and the slow shaft are axially fixed in the clutch outer core and are relatively circumferentially rotatable and inserted together. The fast gear is arranged on the fast shaft, the fast gear and the fast shaft are circumferentially connected in a clutching manner, the slow gear is arranged on the slow shaft, and the slow gear and the slow shaft are circumferentially connected in a clutching manner. The diameter of the slow gear is smaller than that of the fast gear.

[0009] The fixed ring axially slides between the two armatures under the action of the electromagnetic force generated by the two electromagnetic coils, thereby realizing the disengagement of the fast gear and the slow gear.

[0010] The clutch is generally understood, that is, the corresponding transmission components are separated, and the power transmission is interrupted. The corresponding transmission components are engaged, and the power transmission is smoothly realized. The fast gear and the fast shaft are circumferentially connected in a clutching manner, that is, the fast gear is engaged, the power is transmitted, and the fast gear is separated, the power transmission is interrupted. The slow gear and the slow shaft are circumferentially connected in a clutching manner, which has the same meaning as the foregoing.

[0011] The power supply of the two electromagnetic coils is directly controlled by a controller on the vehicle, and the controller can be instructed by a shift button or controlled by corresponding sensors according to the driving conditions of the vehicle. When the vehicle starts, climbs a slope, or is heavily loaded, the slow gear and large torque driving mode is selected, and when the vehicle drives on a flat road or is empty, the fast gear driving mode is selected. The electromagnetic coil generates a magnetic field after being powered, and a large magnetic force is generated between the two electromagnetic coils and the armature. Under the action of the magnetic force, the fixed ring moves towards the corresponding armature, so that the corresponding clutch assembly is engaged to realize power transmission between the corresponding transmission mechanisms. In the case that both electromagnetic coils are not powered, the engagement between the two clutch assemblies cannot meet the transmission requirements. The axial spacing between the two electromagnetic coils is generally centimeters, and the spacing between the fixed ring and the armature is generally millimeters when both electromagnetic coils are not powered.

[0012] The clutch assembly can be a friction plate and a clamping plate structure, or a concave-convex matching structure between the end faces of the corresponding parts.

[0013] Further, the inner shifting structure includes an annular inner top plate and a rotation stopping plate, which are coaxially stacked together, and the rotation stopping plate is clamped on the inner circumferential surface of the clutch outer core. The inner shifting structure can also be a shift fork, and the clutch assembly is the concave-convex matching structure described above. By providing the inner top plate and the rotation stopping plate, the axial stable pressing of the clutch assembly can be realized, and the engagement stability between the friction plate clutch assemblies is improved. In addition, the inner shifting structure is the inner top plate and the rotation stopping plate, which can also realize the axial separation of the two clutch assemblies, facilitating the assembly of the electromagnetic clutch transmission mechanism.

[0014] Further, the rotation stopping plate is integrally formed with a plurality of clamping heads extending obliquely to the same side at the outer edge of the rotation stopping plate, the clamping heads are correspondingly abutted in a plurality of grooves formed on the inner circumferential surface of the clutch outer core, and the clamping heads abut on the outer edge of the inner top plate. Generally, the rotation stopping plate and the inner top plate are installed in place in the clutch outer core by axial pressing, and the clamping heads are provided to stabilize the position of the rotation stopping plate in the clutch outer core during assembly, and also stabilize the installation position of the inner top plate, facilitating the axial action on the clutch assembly.

[0015] Further, the clutch assembly comprises a plurality of annular friction plates and clamping plates arranged coaxially and side by side, the friction plates and clamping plates in the fast gear clutch assembly and the slow gear clutch assembly are arranged axially and spaced apart respectively, the outer edge of the clamping plate is in spline structure cooperation with the inner circumferential surface of the clutch inner core, the friction plate in the slow gear clutch assembly is in spline structure cooperation with the slow gear shaft, and the friction plate in the fast gear clutch assembly is in spline structure cooperation with the fast gear shaft; the slow gear stopper is protrudingly arranged axially and fixed on the slow gear shaft, and the slow gear stopper and the inner shifting structure are arranged on opposite sides of the slow gear clutch assembly; the fast gear stopper is protrudingly arranged axially and fixed on the fast gear shaft, and the fast gear stopper and the inner shifting structure are arranged on opposite sides of the fast gear clutch assembly. Through the arrangement of these structures, the vehicle can be switched between the two driving states conveniently and quickly, which is beneficial to the transmission engagement of the clutch assembly and can well meet the actual working needs.

[0016] Further, the slow gear is in a "convex" shape, the slow gear is arranged horizontally, and the slow gear is inserted and fixed in the slow gear shaft; the fast gear shaft is inserted in the slow gear and the slow gear shaft, and the fast gear and the fast gear clutch assembly are arranged on opposite sides of the slow gear and the slow gear shaft. This can effectively improve the compactness of the overall structure, so that the electromagnetic clutch type transmission mechanism has a small size.

[0017] Further, the coupling seat is fixed to the clutch inner core away from the one end, the power input shaft is fixed to the coupling seat at the axial position of the coupling seat, and the power input shaft and the motor shaft are axially and slidably connected in transmission. Through the arrangement of the coupling seat, the transmission connection between the power input shaft and the clutch inner core is facilitated, and stable radial support can be provided for the clutch inner core.

[0018] Further, the fixed ring and the coupling seat overlap in the axial direction, and a supporting bearing is arranged between the overlapping parts of the fixed ring and the coupling seat. The supporting bearing provides radial support for the fixed ring and makes the fixed ring not need to rotate with the coupling seat.

[0019] Further, a fixed cylinder is fixed to the one end of the motor facing the power input shaft, the armature is fixed in the fixed cylinder, the one end of the fixed cylinder facing the motor is closed, the other end of the fixed cylinder is open, and the power input shaft passes through the closed end of the fixed cylinder in a gap. The fixed cylinder provides support for the overall electromagnetic clutch type transmission mechanism, facilitating the connection and assembly of the corresponding structures.

[0020] Further, the armature is annular, and the outer circumferential surface of the armature is fixedly connected to the inner circumferential surface of the fixed cylinder; the fixed ring is an electromagnetic core, and the two electromagnetic coils are annular and have the same diameter, and the electromagnetic coils are separately embedded in the electromagnetic core. This structure is reasonable and can generate a larger magnetic attraction force, which well meets the actual working needs.

[0021] Further, the needle bearings are arranged between the closed end of the fixed cylinder and the power input shaft, and between the fast gear shaft and the slow gear shaft, and an oil seal is arranged between the power input shaft and the closed end of the fixed cylinder. The electromagnetic transmission mechanism can be filled with lubricating oil, so that the movement of the corresponding structure is smooth. In addition, the needle bearings can provide stable radial support between the corresponding structures, so that the internal structure is balanced.

[0022] Compared with the prior art, the electromagnetic double-clutch transmission has the beneficial effects that: the cylindrical clutch outer core is arranged to realize the clutch transmission between the two clutch assemblies, the overall structure is compact, the overall volume is small, and the weight is light, which helps to maintain the lightness and flexibility of the vehicle and reduces the driving energy consumption. The axial movement of the clutch outer core is realized by the magnetic attraction force between the electromagnetic coil and the armature. When the clutch outer core moves axially, the inner shifting structure axially acts on the corresponding clutch assembly, so that the clutch assembly is in a state that meets the working condition requirements. The overall design is reasonable, and the working stability is good.

[0023] Compared with the ordinary hydraulic transmission mechanism, the electromagnetic double-clutch transmission utilizes the magnetic force generated by the electromagnet or electromagnetic coil to control the engagement and separation of the clutch. The electromagnetic double-clutch transmission mechanism directly drives the clutch through electromagnetic force, and the driving components only include the electromagnetic coil and the control system, etc. The mass and occupied space are smaller, the structure is simple and compact, and the maintenance is simple. The traditional hydraulic double-clutch transmission relies on the hydraulic system to control and shift the clutch, but the hydraulic system itself has a certain response delay and energy loss, and the shift time is more than 0.2-0.5 seconds. Since the electromagnetic force has the characteristics of fast response speed, the electromagnetic double-clutch transmission directly drives the clutch through the electromagnetic force without the aid of other mechanical structures, thereby realizing faster shift operation, realizing the engagement and separation of the clutch, and the shift response time can reach 0.1 seconds. The clutch in the electromagnetic double-clutch transmission is directly driven by electromagnetic force, without the need for complex mechanical transmission mechanisms, thereby reducing the energy loss in the transmission process. The fast response speed of the electromagnetic double-clutch transmission can complete the engagement and separation actions in a very short time, thereby reducing the energy waste caused by the long shift time. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structure diagram of the electromagnetic double-clutch power mechanism applied to the rear axle.

[0025] Figure 2 is Figure 1 a longitudinal sectional view.

[0026] Figure 3 is a partial structure enlarged sectional view of the electromagnetic clutch transmission mechanism.

[0027] Figure 4Is a part structure assembly diagram of electromagnetic clutch type transmission mechanism.

[0028] Figure 5 Is an explosion view of electromagnetic core, clutch outer core and clutch assembly.

[0029] Figure 6 Is an explosion view of clutch outer core and clutch assembly.

[0030] In the figure, 1, rear axle; 2, bull gear; 3, pinion; 4, driven gear; 5, driving gear; 6, motor; 7, fixed cylinder; 8, fixed cylinder; 8, deep groove ball bearing; 9, fast gear; 10, slow gear; 11, differential; 12, clutch outer core; 121, groove; 13, transmission shaft; 14, electromagnetic coil; 15, armature; 16, supporting bearing; 17, power input shaft; 18, oil seal; 19, needle bearing; 20, fast stop; 21, coupling seat; 22, fast clutch assembly; 23, rotation stop plate; 24, inner top plate; 25, slow clutch assembly; 26, slow stop; 27, fast shaft; 28, slow shaft; 29, electromagnetic core; 30, clamping plate; 31, friction plate. DETAILED DESCRIPTION

[0031] Combined with the description of the drawings, the electromagnetic double clutch type power mechanism can be arranged on the rear axle 1 of the wheeled vehicle, and the differential 11 is arranged in the rear axle 1, and the driven gear 4 is arranged on the differential 11, and the driven gear 4 is in transmission connection with the power shaft in the rear axle 1, and the two ends of the power shaft are in transmission connection with the wheels.

[0032] The structure of the electromagnetic double clutch type power mechanism includes the motor 6, and the motor 6 provides power for the driven gear 4 through the electromagnetic clutch type transmission mechanism. The transmission shaft 13 is arranged outside the differential 11, and the driving gear 5, the bull gear 2 and the pinion 3 are arranged on the transmission shaft 13 in parallel and coaxially, and the deep groove ball bearings 8 are respectively sleeved and fixed at the two ends of the transmission shaft 13, and the deep groove ball bearings 8 are fixed in the shell, so that the transmission shaft 13 is axially fixed. The diameter of the bull gear 2 is greater than that of the pinion 3, the driving gear 5 is engaged with the driven gear 4, and power transmission on the transmission shaft 13 is realized to the driven gear 4. The bull gear 2 and the pinion 3 are in staggered transmission connection with the motor 6 through the electromagnetic clutch type transmission mechanism, and the power on the motor 6 cannot be simultaneously transmitted to the bull gear 2 and the pinion 3.

[0033] The electromagnetic clutch type transmission mechanism includes an axially movable fixed ring, and the fixed ring is an electromagnetic core 29, and two electromagnetic coils 14 are arranged in parallel in the electromagnetic core 29, and the two electromagnetic coils 14 are equal-diameter annular rings, and the electromagnetic coils 14 are coaxially embedded in the electromagnetic core 29. An armature 15 is fixedly arranged at the outer side of each of the two opposite ends of the electromagnetic coil 14 in the axial direction, and the electromagnetic coil 14 generates magnetic attraction force on the armature 15 after being electrified.

[0034] The cylindrical clutch outer core 12 is axially fixed with the electromagnetic core 29, and is located at the radial inner side of the electromagnetic core 29. The clutch outer core 12 is axially slidingly connected with the motor shaft in the opposite circumferential direction, and can rotate relative to the electromagnetic core 29 under the driving of the motor shaft. The fast gear clutch assembly 22 and the slow gear clutch assembly 25 are arranged in parallel in the clutch outer core 12, and the clutch outer core 12 is circumferentially connected with the fast gear clutch assembly 22 and the slow gear clutch assembly 25. The inner shifting structure is axially fixed in the clutch outer core 12, and when the clutch outer core 12 moves towards the corresponding armature 15, the inner shifting structure is axially driven by the clutch outer core 12 to drive the fast gear clutch assembly 22 and the slow gear clutch assembly 25, so that the corresponding clutch assembly forms a joint that meets the transmission requirements.

[0035] The fast gear shaft 27 and the slow gear shaft 28 are axially fixed in the clutch outer core 12, and are inserted and matched together in the opposite circumferential direction, and the deep groove ball bearings 8 are fixed on the outer circumferences of the fast gear shaft 27 and the slow gear shaft 28, and the deep groove ball bearings 8 are fixed in the outer shell, so that the fast gear shaft 27 and the slow gear shaft 28 are axially fixed. The fast gear 9 is fixedly connected to the fast gear shaft 27, and the fast gear clutch assembly 22 is circumferentially connected with the fast gear shaft 27. The slow gear 10 is arranged on the slow gear shaft 28, and the slow gear clutch assembly 25 is circumferentially connected with the slow gear shaft 28. In order to facilitate the transmission connection, the slow gear 10 and the fast gear 9 are located at the axial outer side of the clutch outer core 12, the diameter of the slow gear 10 is smaller than that of the fast gear 9, the slow gear 10 is engaged with the large gear 2 outside the clutch outer core 12, and the fast gear 9 is engaged with the small gear 3 outside the clutch outer core 12.

[0036] The electromagnetic core 29 axially slides between the two armatures 15 under the action of the electromagnetic force generated by the two electromagnetic coils 14, so as to realize the dislocation of the fast gear clutch assembly 22 and the slow gear clutch assembly 25, and the two clutch assemblies cannot be engaged at the same time. When one clutch assembly is engaged, the other clutch assembly is in a separated state.

[0037] The inner dial structure comprises an annular inner top plate 24 and a rotation-stopping plate 23. The rotation-stopping plate 23 is made of stainless steel, and the inner top plate 24 and the rotation-stopping plate 23 are coaxially stacked together. The rotation-stopping plate 23 is clamped on the inner circumferential surface of the clutch outer core 12. Since the rotation-stopping plate 23 is clamped on the inner circumferential surface of the clutch outer core 12, the inner dial structure is axially stable in the clutch outer core 12. A plurality of clamping heads are integrally formed on the outer edge of the rotation-stopping plate 23 and extend obliquely to the same side. A plurality of grooves 121 are formed on the inner circumferential surface of the clutch outer core 12 and are arranged along the axial direction of the clutch outer core 12. The grooves 121 are uniformly distributed in the circumferential direction of the clutch outer core 12. The number of the clamping heads and the grooves 121 is consistent. One clamping head is correspondingly abutted on the bottom surface of one groove 121. When the rotation-stopping plate 23 is assembled, the rotation-stopping plate 23 is stamped away from the extending direction of the clamping head, so that the clamping head is deformed. The deformed clamping head is abutted on the outer edge of the inner top plate 24, so that the inner top plate 24 is axially fixed in the clutch outer core 12.

[0038] The clutch assembly comprises a plurality of annular friction plates 31 and clamping plates 30 which are coaxially arranged together. The axial end surface of the friction plate 31 is provided with a grid-shaped pattern to increase the friction. The clamping plate 30 is made of stainless steel. The friction plates 31 and the clamping plates 30 in the fast gear clutch assembly 22 and the slow gear clutch assembly 25 are respectively arranged at intervals in the axial direction. The outer edge of the clamping plate 30 is in spline structure cooperation with the inner circumferential surface of the clutch outer core 12. The friction plate 31 in the slow gear clutch assembly 25 is in spline structure cooperation with the slow gear shaft 28. The friction plate 31 in the fast gear clutch assembly 22 is in spline structure cooperation with the fast gear shaft 27. The outer edge of the friction plate 31 is not in contact with the inner circumferential surface of the clutch inner core. The inner edge of the clamping plate 30 is not in contact with the slow gear shaft 28 and the fast gear shaft 27. A protruding convex body is integrally formed on the inner edge of the friction plate 31. The number of the convex body corresponds to the spline groove on the fast gear shaft 27 and the slow gear shaft 28. The convex body on the friction plate 31 is correspondingly and gapingly inserted into the spline groove. A protruding convex body is also integrally formed on the outer edge of the clamping plate 30. The number of the convex body corresponds to the number of the grooves 121 on the inner circumferential surface of the clutch outer core 12. The convex body on the clamping plate 30 is correspondingly and gapingly inserted into the groove 121. In order to block the clutch assembly in the axial direction, the slow gear stop 26 is protrudingly arranged on the slow gear shaft 28 in the axial direction. The slow gear stop 26 and the inner dial structure are arranged on opposite sides of the slow gear clutch assembly 25. The fast gear stop 20 is protrudingly arranged on the fast gear shaft 27 in the axial direction. The fast gear stop 20 and the inner dial structure are arranged on opposite sides of the fast gear clutch assembly 22. Under the blocking action of the slow gear stop 26 and the fast gear stop 20, when the inner dial structure axially pushes the clutch assembly, the clamping plate 30 and the friction plate 31 in the clutch assembly are axially abutted together to generate static friction. The generated static friction is greater than the corresponding dynamic transmission requirement.

[0039] The slow gear 10 is in a "convex" shape, and is horizontally arranged and fixedly connected to the slow shaft 28. The fast shaft 27 is inserted into the slow gear 10 and the slow shaft 28, and the fast gear 9 and the fast clutch assembly 22 are arranged on opposite sides of the slow gear 10 and the slow shaft 28. As shown in the figure, the slow clutch assembly 25 is arranged on the left side of the stop plate 23, and the fast clutch assembly 22 is arranged on the right side of the stop plate 23. The clamping plate 30 and the friction plate 31 in the slow clutch assembly 25 are four groups to meet the transmission requirement of slow speed and large torque, and the clamping plate 30 and the friction plate 31 in the fast clutch assembly 22 are two groups to meet the transmission requirement of fast speed and small torque.

[0040] The coupling seat 21 is fixedly connected to the outer core 12 away from the one end, and is a block-shaped body. The power input shaft 17 is fixedly connected to the coupling seat 21 at the axial position, and the power input shaft 17 and the motor 6 are horizontally arranged. The power input shaft 17 and the motor shaft are coaxially arranged, and the spline structure is arranged between the end portions close to each other of the power input shaft 17 and the motor shaft, and the power input shaft 17 can axially slide relative to the motor shaft. The electromagnetic core 29 and the coupling seat 21 are axially overlapped, and the supporting bearing 16 is arranged between the overlapped portions of the electromagnetic core 29 and the coupling seat 21, and the supporting bearing 16 is axially fixed relative to the electromagnetic core 29 and the coupling seat 21.

[0041] The fixed cylinder 7 is fixedly connected to the one end of the motor 6 facing the power input shaft 17, the one end of the fixed cylinder 7 is closed, the other end of the fixed cylinder 7 is open, and the closed end of the fixed cylinder 7 is fixed on the end portion of the motor 6 by bolts. The armature 15 is a circular ring, and the outer circumferential surface of the armature 15 is fixedly connected to the inner circumferential surface of the fixed cylinder 7, and the power input shaft 17 passes through the closed end of the fixed cylinder 7 in a clearance. The needle bearing 19 is arranged between the closed end of the fixed cylinder 7 and the power input shaft 17, and between the fast shaft 27 and the slow shaft 28, and the oil seal 18 is arranged between the power input shaft 17 and the closed end of the fixed cylinder 7.

Claims

1. An electromagnetic dual clutch type power mechanism comprising a motor and an electromagnetic clutch type transmission mechanism, characterized by, The electromagnetic clutch type transmission mechanism comprises an axially movable fixed ring, two electromagnetic coils arranged side by side on the fixed ring, and a clapper fixedly arranged outside the opposite ends of the fixed ring in the axial direction; The cylindrical clutch outer core is axially fixed with the fixed ring, and is axially slidably connected with the motor shaft in the relative circumferential fixed manner. Under the driving of the motor shaft, the clutch outer core can rotate relative to the fixed ring. The fast gear clutch assembly and the slow gear clutch assembly are arranged side by side in the clutch outer core, and the clutch outer core is circumferentially connected with the fast gear clutch assembly and the slow gear clutch assembly. The inner shifting structure is axially fixed in the clutch outer core, and is used for axially acting on the fast gear clutch assembly and the slow gear clutch assembly under the driving of the clutch outer core. The fast gear shaft and the slow gear shaft are axially fixed in the clutch outer core, and are relatively circumferentially rotatable and insertedly fitted together. The fast gear shaft is provided with a fast gear, and the fast gear clutch assembly is circumferentially connected with the fast gear shaft in a clutching manner. The slow gear shaft is provided with a slow gear, and the slow gear clutch assembly is circumferentially connected with the slow gear shaft in a clutching manner. The slow gear and the fast gear are both arranged outside the clutch outer core in the axial direction, and the diameter of the slow gear is smaller than that of the fast gear. Under the action of the electromagnetic force generated by the two electromagnetic coils, the fixed ring axially slides between the two clappers, so as to realize the dislocation of the fast gear clutch assembly and the slow gear clutch assembly.

2. The electromagnetic twin-clutch power mechanism according to claim 1, characterized by The inner shifting structure comprises an annular inner top plate and a rotation-stopping plate, and the inner top plate and the rotation-stopping plate are coaxially stacked together, and the rotation-stopping plate is clamped on the inner circumferential surface of the clutch outer core.

3. The electromagnetic dual clutch power mechanism according to claim 2, characterized by The outer edge of the rotation-stopping plate is integrally formed with a plurality of clamping heads extending obliquely to the same side, the clamping heads are correspondingly arranged in a plurality of grooves formed on the inner circumferential surface of the clutch outer core, and the clamping heads are arranged on the outer edge of the inner top plate.

4. The electromagnetic twin-clutch power mechanism according to claim 3, characterized by The clutch assembly comprises a plurality of annular friction plates and clamping plates arranged coaxially and side by side together, the friction plates and the clamping plates in the fast gear clutch assembly and the slow gear clutch assembly are respectively arranged at intervals in the axial direction, the outer edge of the clamping plate is in spline structure with the inner circumferential surface of the clutch inner core, the friction plate in the slow gear clutch assembly is in spline structure with the slow gear shaft, and the friction plate in the fast gear clutch assembly is in spline structure with the fast gear shaft. The slow gear stopper is axially and protrusively arranged on the slow gear shaft, and the slow gear stopper and the inner shifting structure are arranged on opposite sides of the slow gear clutch assembly. The fast gear stopper is axially and protrusively arranged on the fast gear shaft, and the fast gear stopper and the inner shifting structure are arranged on opposite sides of the fast gear clutch assembly.

5. The electromagnetic, dual-clutch power mechanism of claim 4, wherein, The slow gear is in a "convex” shape, and the slow gear is horizontally arranged and insertedly and fixedly connected in the slow gear shaft. The fast gear shaft is inserted in the slow gear and the slow gear shaft, and the fast gear and the fast gear clutch assembly are arranged on opposite sides of the slow gear and the slow gear shaft.

6. The electromagnetic, dual-clutch power mechanism of claim 1, wherein, The coupling seat is fixedly arranged on the opposite end of the clutch inner core, the power input shaft is fixedly arranged at the axial position of the coupling seat, and the power input shaft and the motor shaft are axially and slidably connected.

7. The electromagnetic, dual-clutch power mechanism of claim 6, wherein, The fixed ring and the coupling seat are axially overlapped, and the supporting bearing is arranged between the overlapped parts of the fixed ring and the coupling seat.

8. The electromagnetic, dual-clutch power mechanism of claim 6, wherein, A fixed cylinder is fixed on the end of the motor towards the power input shaft, the armature is fixed in the fixed cylinder, the end of the fixed cylinder towards the motor is closed, the other end of the fixed cylinder is open, the power input shaft passes through the closed end of the fixed cylinder in clearance.

9. The electromagnetic, dual-clutch power mechanism of claim 8, wherein, The armature is circular ring, the outer circumferential surface of the armature is fixed on the inner circumferential surface of the fixed cylinder, the fixed ring is an electromagnetic core, the two electromagnetic coils are equal-diameter circular rings, the electromagnetic coils are separately embedded in the electromagnetic core.

10. The electromagnetic, dual-clutch power mechanism of claim 8, wherein, Roller bearings are respectively arranged between the closed end of the fixed cylinder and the power input shaft, and between the fast shift shaft and the slow shift shaft, and an oil seal is arranged between the power input shaft and the closed end of the fixed cylinder.

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