Flat wire motor structure with speed reducer
By setting up a sealing structure and positioning device between the output shaft and the box cover hole in an electric vehicle, the problems of unstable sprocket operation and oil leakage are solved, axial positioning and sealing are achieved, and the stability of the motor is improved. Protection performance.
Patent Information
- Application Number
- CN202420780315.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-16
AI Technical Summary
In existing electric vehicles, the coordination between the reducer and the sprocket leads to unstable sprocket operation and oil leakage.
The first bearing, a seal guide sleeve, an oil seal and a seal ring are arranged between the output shaft and the box cover hole, and the output shaft and the sprocket are connected by splines, and the positioning bumps and a stop-retardation groove are set on the wall of the box cover hole. Use elastic retaining rings for axial positioning and sealing to ensure radial and axial sealing.
The axial positioning of the sprocket and the sealing between the output shaft and the box cover hole are realized, which reduces the sprocket movement and oil leakage, and improves the stability and protection performance of the motor.
Smart Images
Figure CN222262384U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a flat wire motor structure with a reducer, belonging to the technical field of flat wire motors. Background Art
[0002] In existing electric vehicles, the motor is a driving element used to drive the vehicle. The motor is usually connected to a reducer to achieve the effect of reducing speed and increasing torque. The reducer uses a sprocket transmission to transmit the reduced driving force of the motor to the wheels. However, the existing coordination between the reducer and the sprocket has the following disadvantages and shortcomings: 1. The reducer uses an output shaft for output, and the sprocket is fixed on the output shaft. The sprocket is prone to axial movement during the operation of the motor, resulting in unstable operation of the sprocket; 2. The end of the output shaft is located outside the reducer case and connected to the sprocket. The reducer case is usually provided with oil to lubricate the gears. The existing output shaft end and the reducer case are prone to oil leakage. Utility Model Content
[0003] The utility model aims to provide a flat wire motor structure with a reducer for realizing radial and axial sealing between an output shaft and a box cover hole in view of the shortcomings of the prior art.
[0004] To achieve the purpose, the technical solution adopted by the utility model is:
[0005] A flat wire motor structure with a reducer comprises a motor body and a reducer, wherein the reducer is provided with a box cover hole, the input shaft of the reducer is connected to the motor body, the end of the output shaft of the reducer passes through the box cover hole and is sleeved with a sprocket, a first bearing, a sealing guide sleeve, an oil seal and a sealing ring are arranged between the output shaft and the box cover hole, the sealing guide sleeve, the sealing ring and the first bearing are sleeved on the output shaft in sequence, and the oil seal is sleeved on the sealing guide sleeve.
[0006] As a further optimization of the above technical solution: the output shaft and the sprocket are connected by splines, a sealing ring groove is formed at the end of the sealing guide sleeve, the sealing ring is located in the sealing ring groove, one end of the sealing guide sleeve is in contact with the first bearing, the sealing ring is tightly attached to the bottom of the sealing ring groove and the side of the first bearing, the side of the sprocket is in contact with the other end of the sealing guide sleeve, and the outer peripheral surface of the oil seal is in contact with the hole wall of the box cover hole.
[0007] As a further optimization of the above technical solution: a first positioning protrusion is formed on the hole wall of the box cover hole, the side surface of the first bearing contacts the first positioning protrusion, and the side surface of the oil seal contacts the first positioning protrusion.
[0008] As a further optimization of the above technical solution: a back-stop groove is also formed on the hole wall of the box cover hole, the back-stop groove is located on the outer side of the outer peripheral surface of the oil seal, and the groove wall of the back-stop groove is set as an inclined surface.
[0009] As a further optimization of the above technical solution: a fastening bolt is also threadedly installed on the end of the output shaft, and the rod of the fastening bolt is sleeved with a first retaining ring, the first retaining ring is an elastic member, and the side surface of the sprocket is in contact with the first retaining ring.
[0010] As a further optimization of the above technical solution: the motor body includes a motor housing, and a front end cover and a rear end cover arranged at both ends of the motor housing, the reducer is arranged on the front end cover, and the reducer includes a reduction gear box body integrally formed on the front end cover and protruding outward, a reduction gear box cover is installed on the reduction gear box body, and the box cover hole is located on the reduction gear box cover.
[0011] As a further optimization of the above technical solution: a stator and a rotor are arranged in the motor housing, the stator includes a stator core and a plurality of flat wire conductors assembled on the stator core, the rotor is located in the stator, a motor shaft is passed through the rotor, bearing holes are formed on the front end cover and the rear end cover, a second bearing is arranged in the bearing hole, and both ends of the motor shaft are rotatably mounted on the front end cover and the rear end cover through the second bearing.
[0012] As a further optimization of the above technical solution: the rotor includes several layers of rotor assemblies, the rotor assemblies include a rotor core and a permanent magnet, the side of the rotor core with the self-locking groove is the front side, several layers of the rotor assemblies are stacked axially and arranged in a positive and negative alternating pattern, the angle between two adjacent magnetic pole axes is the magnetic pole angle β, wherein there is an angle α between the center line of the keyway in the inner hole of the rotor core and the center line of the magnetic pole angle β, and the angle α is 1.5°-15°.
[0013] As a further optimization of the above technical solution: a third bearing is provided on the reduction gearbox cover and the reduction gearbox body, the end of the input shaft is located in the third bearing on the reduction gearbox cover, the end of the output shaft is located in the third bearing on the reduction gearbox body, and a second O-ring is sleeved on the input shaft and the output shaft. When the input shaft, the output shaft and the third bearing are matched, the second O-ring is squeezed and fits tightly against the back cutter groove on the input shaft, the back cutter groove on the output shaft and the fillet of the inner ring of the third bearing.
[0014] As a further optimization of the above technical solution: a fastening screw is installed on the motor housing, a positioning groove is formed on the outer peripheral surface of the stator, and the end of the fastening screw is inserted into the positioning groove.
[0015] As a further optimization of the above technical solution: a sealing glue groove is provided on the contact surface between the reduction gear box cover and the reduction gear box body, the sealing glue groove is located on the reduction gear box cover, and the sealing glue groove is used for storing the sealing glue.
[0016] As a further optimization of the above technical solution: the reduction box cover is also provided with an oil inlet hole, the oil inlet hole is used for injecting and adding gear lubricating oil, and the oil inlet hole is provided with an oil inlet bolt for closing and sealing the oil inlet hole.
[0017] As a further optimization of the above technical solution: a second retaining ring is further provided in the bearing hole of the front end cover, the second retaining ring is elastic, and the second bearing is in contact with the second retaining ring.
[0018] As a further optimization of the above technical solution: a second positioning protrusion is also formed in the bearing hole, and the second retaining ring and the second bearing on the rear end cover are in contact with the second positioning protrusion.
[0019] As a further optimization of the above technical solution: an O-ring groove is formed on the hole wall of the bearing hole, a first O-ring is sleeved on the outer peripheral surface of the second bearing, and the first O-ring is located in the O-ring groove.
[0020] As a further optimization of the above technical solution: two baffles are also sleeved on the motor shaft, and the two baffles are respectively located on both sides of the rotor. A positioning step is formed on the motor shaft, and the side surface of the baffle is in contact with the positioning step. A stop washer and a round nut are also sleeved on the motor shaft, and the baffle is in contact with the stop washer. The two baffles perform axial positioning on the rotor.
[0021] As a further optimization of the above technical solution: one end of the rotor extends into the reducer to serve as the input shaft of the reducer, a driving gear and a driven gear are provided in the reduction housing, the driving gear is sleeved on the input shaft, the driven gear is integrally formed on the output shaft and meshes with the driving gear, and the input shaft of the reducer is installed with the driving gear through a spline.
[0022] As a further optimization of the above technical solution: the rear end cover is also provided with an installation cavity connected to the bearing hole, a rotor position sensor is arranged in the installation cavity, the rear end cover is provided with a plurality of waterproof connectors, the front end cover is provided with a waterproof breathable valve, and the reduction box cover is provided with a normally closed vent valve.
[0023] Compared with the prior art, the utility model provides a first bearing, a sealing guide sleeve, an oil seal and a sealing ring between the output shaft and the case cover hole, so as to realize the radial and axial sealing between the output shaft and the case cover hole and realize the axial positioning of the sprocket; the first retaining ring is an elastic member, the sprocket contacts the first retaining ring, and the first retaining ring adopts an elastic method to axially position the sprocket, so as to compensate for the eccentric error after the chain is installed; the stator adopts a flat wire structure to improve the power density and lightweight of the motor; a second O-ring is provided between the input shaft, the output shaft and the third bearing, and the second O-ring buffers and compensates the axial force generated by the driving gear and the driven gear during operation, thereby reducing the impact noise; the fastening screw and the positioning groove cooperate to position the stator to prevent the stator from being forced to rotate or axially displaced under extreme conditions. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.
[0025] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at point A in the middle.
[0026] Figure 3 It is a three-dimensional structural schematic diagram of the utility model.
[0027] Figure 4 It is a structural schematic diagram of the rotor in the utility model. DETAILED DESCRIPTION
[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations. Figure 1-4 As shown, a flat wire motor structure with a reducer includes a motor body 1 and a reducer 2. The motor body 1 includes a motor housing 11, and a front cover 12 and a rear cover 13 arranged at both ends of the motor housing 11. The reducer 2 is arranged on the front cover 12. The reducer 2 includes a reduction box body 21 that is integrally formed on the front cover 12 and protrudes outward. A reduction box cover 22 is installed on the reduction box body 21, and a box cover hole is formed on the reduction box cover 22. The input shaft of the reducer 2 is connected to the motor body 1, and the end of the output shaft 23 of the reducer 2 passes through the box cover hole and is sleeved with a sprocket 3. The output shaft 23 and the sprocket 3 are connected by an involute spline. The reduction box body 21 is integrally formed on the front cover 12, which greatly reduces the axial length of the motor.
[0029] In the above technical scheme, a first bearing 24, a sealing guide sleeve 25, an oil seal 26 and a sealing ring 27 are arranged between the output shaft 23 and the box cover hole. The first bearing 24, the sealing guide sleeve 25 and the sealing ring 27 are all sleeved on the output shaft 23, and the outer peripheral surface of the first bearing 24 contacts the hole wall of the box cover hole. A first positioning convex block 28 is formed on the hole wall of the box cover hole, and the side surface of the first bearing 24 contacts the first positioning convex block 28. A sealing ring groove 251 is formed at the end of the sealing guide sleeve 25, and the sealing ring 27 is located in the sealing ring groove 251. One end of the sealing guide sleeve 25 contacts the first bearing 24, and the sealing ring groove 251 squeezes the sealing ring 27, so that the sealing ring 27 is closely attached to the groove bottom of the sealing ring groove 251 and the side surface of the first bearing 24, and the sealing ring 27 realizes the axial sealing between the sealing guide sleeve 25 and the first bearing 24 and the output shaft 23. The side surface of the sprocket wheel 3 contacts the other end of the sealing guide sleeve 25 , and the sealing guide sleeve 25 performs axial positioning on the installation of the sprocket wheel 3 .
[0030] In the above technical solution: the oil seal 26 is sleeved on the sealing guide sleeve 25, the outer peripheral surface of the oil seal 26 contacts the hole wall of the box cover hole, and the outer peripheral surface of the sealing guide sleeve 25 is radially sealed through the oil seal 26. The side of the oil seal 26 contacts the first positioning protrusion 28. A backstop groove 29 is also formed on the hole wall of the box cover hole. The backstop groove 29 is located on the outer side of the outer peripheral surface of the oil seal 26. When the air pressure inside the reducer 2 is too high, the backstop groove 29 plays a role of buffering and regulation, so that the air pressure inside and outside the reducer 2 is more balanced, preventing the oil seal 26 from popping out due to excessive air pressure, ensuring the stable installation of the oil seal 26, and reducing oil leakage. The groove wall of the backstop groove 29 is set as an inclined surface 291. During the installation of the oil seal, the inclined surface 291 prevents the outer diameter of the oil seal from being scratched and damaged by the notch of the backstop groove 29, which affects the sealing effect.
[0031] In the above technical solution, the outer peripheral surface of the sealing guide sleeve 25 is also formed with a circle of reinforcing protrusions 252. Compared with the straight-tube shaft sleeve, the sealing guide sleeve 25 can increase the contact area with the sprocket 3 and has a better positioning effect. At the same time, the sealing guide sleeve 25 has stronger rigidity and is not prone to out-of-roundness (roundness) phenomenon, thereby ensuring the coaxiality between the oil seal 26 and the sealing guide sleeve 25.
[0032] In the above technical solution: a fastening bolt 210 is also threadedly installed at the end of the output shaft 23, and a first retaining ring 211 is sleeved on the rod of the fastening bolt 210. The two sides of the sprocket 3 are respectively in contact with the sealing guide sleeve 25 and the first retaining ring 211. The first retaining ring 211 is an elastic member, and the first retaining ring 211 adopts an elastic method to axially position the sprocket, so as to compensate for the eccentricity error after the chain is installed.
[0033] In the above technical solution: a stator 14 and a rotor 15 are arranged in the motor housing 11. The stator 14 includes a stator core 141 and a plurality of flat wire conductors 142 mounted on the stator core 141. The flat wire structure can improve the power density and lightness of the motor. The rotor 15 is located in the stator 14, and a motor shaft 16 is passed through the rotor 15. The front cover 12 and the rear cover 13 are both provided with bearing holes, and a second bearing 17 is arranged in the bearing hole. The two ends of the motor shaft 16 are rotatably mounted on the front cover 12 and the rear cover 13 through the second bearing 17. Specifically, the model of the second bearing 17 is 2RZ (non-contact with labyrinth rubber cover sealing structure), which can take into account low resistance and low grease leakage rate when the motor runs at high speed.
[0034] In the above technical solution: the rotor 15 includes several layers of rotor assemblies, and the rotor assemblies are composed of a rotor core 152 and a permanent magnet 151 according to a certain magnetic pole arrangement. Assume that the side with the self-locking groove on the rotor core 152 is the front side, and several layers of rotor assemblies are stacked along the axial direction and arranged in a positive and negative alternating pattern. There is an angle α between the center line of the keyway of the inner hole of the rotor core 152 and the center line of the magnetic pole angle β, and the angle α is 1.5°-15°. The magnetic pole angle β refers to the angle between the axes of two adjacent magnetic poles in the motor. The above structure enables the permanent magnet 151 of each pole of the rotor to form a skewed pole structure setting composed of multiple permanent magnet segments, which breaks the existing permanent magnet motor inner rotor structure The vertical integral structure of the same-pole permanent magnet can effectively reduce the rotor tooth slot positioning torque, thereby improving the output performance of the rotor, reducing the vibration and noise of the motor operation, and improving the transient starting performance of the motor, and obtaining excellent NVH performance. NVH performance refers to the English abbreviation of noise, vibration and harshness, which is used to measure the manufacturing quality of automobiles.
[0035] In the above technical solution: an O-ring groove is formed on the wall of the bearing hole, and a first O-ring 18 is sleeved on the outer peripheral surface of the second bearing 17, and the first O-ring 18 is located in the O-ring groove. The first O-ring 18 is an elastic member. When the motor is running or the radial movement occurs due to thermal expansion and contraction, the first O-ring 18 can compensate for the existing radial clearance and play a buffering role; at the same time, the first O-ring 18 can also reduce the frequency and amplitude of the 1, 3, and 5 harmonic vibrations.
[0036] In the above technical solution: a second retaining ring 19 is also provided in the bearing hole of the front end cover 12, the second retaining ring 19 is elastic, the second bearing 17 is in contact with the second retaining ring 19, and the second retaining ring 19 is used to compensate for the axial displacement of the second bearing 17 caused by thermal expansion and contraction of the motor.
[0037] In the above technical solution, a second positioning protrusion 110 is also formed in the bearing hole, and the second retaining ring 19 and the second bearing 17 on the rear end cover 13 are in contact with the second positioning protrusion 110. The second positioning protrusion 110 positions the installation of the second bearing 17.
[0038] In the above technical solution: one end of the rotor 15 extends into the reducer 2 to serve as the input shaft of the reducer 2. A driving gear 212 and a driven gear 213 are provided in the reduction housing 21. The driving gear 212 is sleeved on the input shaft, and the driven gear 213 is integrally formed on the output shaft 23 to mesh with the driving gear 212. The input shaft of the reducer 2 is mounted with the driving gear 212 through a spline.
[0039] In the above technical solution: the third bearing 214 is provided on the reduction box cover 22 and the reduction box body 21, the end of the input shaft is located in the third bearing 214 on the reduction box cover 22, and the end of the output shaft 23 is located in the third bearing 214 on the reduction box body 21. The input shaft and the output shaft 23 are sleeved with a second O-ring 215. When the input shaft, the output shaft 23 and the third bearing 214 are matched, the second O-ring is squeezed and fits tightly with the undercut groove on the input shaft, the undercut groove on the output shaft 23, and the inner round corner of the third bearing 214. The second O-ring 215 buffers and compensates the axial force generated by the driving gear 212 and the driven gear 213 during operation, reducing impact noise.
[0040] In the above technical solution: the rear end cover 13 is also provided with an installation cavity connected to the bearing hole, and a rotor position sensor 4 is arranged in the installation cavity. The installation cavity is used as a rotor position signal installation space, and various position sensors such as magnetic encoders, rotary transformers and Hall sensors can be optionally installed. The rotor position sensor 4 and the phase line lead-out line on the motor shaft 16 adopt a split structure, and a plurality of waterproof connectors 5 are arranged on the rear end cover 13, so that while improving the motor protection level, the interference of high-frequency waves of large current on the phase line to the signal is reduced, which is conducive to the continuous and stable operation of the motor. A waterproof breathable valve 6 is arranged on the front end cover 12, which is used for the air in the cavity to breathe to balance the air pressure when the motor is running and heating and cooling, and at the same time prevents water vapor from entering the motor to cause a malfunction.
[0041] In the above technical solution: two baffles 7 are sleeved on the motor shaft 16, and the two baffles 7 are respectively located on both sides of the rotor 15. A positioning step 161 is formed on the motor shaft 16, and the side of one baffle 7 is in contact with the positioning step 161. A stop washer 162 and a round nut 163 are also sleeved on the motor shaft 16, and the other baffle 7 is in contact with the stop washer 162. The round nut 163 and the stop washer 162 are used for axial pre-tightening and anti-loosening of the baffle 7. The two baffles 7 perform axial positioning on the rotor 15, and also serve as dynamic balancing plates, debug the material removal area, and balance the rotor.
[0042] In the above technical solution: the motor housing 11 adopts an aluminum alloy stretching process and a T5 or T6 heat treatment process. Compared with the casting process, its mechanical properties are superior and its weight is better. A fastening screw 8 is installed on the motor housing 11, and a positioning groove is formed on the outer peripheral surface of the stator 14. The end of the fastening screw 8 is inserted into the positioning groove. The fastening screw 8 and the positioning groove cooperate to position the stator to prevent the stator from being forced to rotate or axially displaced in extreme cases.
[0043] In the above technical solution: a normally closed vent valve 9 is provided on the reduction box cover 22, which allows the air in its cavity to breathe and cause air pressure balance, and also prevents mud or water vapor from entering the box, reducing the risk of gear lubricating oil emulsification.
[0044] In the above technical solution: a sealant groove 221 is provided on the contact surface between the reduction box cover 22 and the reduction box body 21. The sealant groove 221 is located on the reduction box cover 22. The sealant groove 221 is used to store sealant, thereby enhancing the sealing effect between the reduction box cover 22 and the reduction box body 21.
[0045] In the above technical solution: the reduction box cover 22 is also provided with an oil inlet hole, which is used for injecting and adding gear lubricating oil. The oil inlet hole is provided with an oil inlet bolt 10 for closing and sealing the oil inlet hole.
[0046] In the utility model, a first bearing 24, a sealing guide sleeve 25, an oil seal 26 and a sealing ring 27 are arranged between the output shaft 23 and the box cover hole, so as to realize the radial and axial sealing between the output shaft 23 and the box cover hole and realize the axial positioning of the sprocket 3; the first retaining ring 211 is an elastic member, the sprocket 3 is in contact with the first retaining ring 211, and the first retaining ring 211 adopts an elastic method for the axial positioning of the sprocket, which is used to compensate for the eccentricity error after the chain is installed; the stator 14 adopts a flat wire structure to improve the power density and lightweight of the motor; a second O-ring 215 is arranged between the input shaft, the output shaft 23 and the third bearing 214, and the second O-ring 215 buffers and compensates the axial force generated by the driving gear 212 and the driven gear 213 during operation, thereby reducing the impact noise; the fastening screw 8 cooperates with the positioning groove to position the stator to prevent the stator from being forced to rotate or axially displaced in extreme cases.
[0047] The preferred specific embodiments of the present utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the present utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the present utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should fall within the protection scope of the present utility model.
Claims
1. A flat wire motor structure with a reducer, characterized in that The invention comprises a motor body (1) and a reducer (2), wherein the reducer (2) is provided with a case cover hole, the input shaft of the reducer (2) is connected to the motor body (1), the end of the output shaft (23) of the reducer (2) passes through the case cover hole and is sleeved with a sprocket (3), a first bearing (24), a sealing guide sleeve (25), an oil seal (26) and a sealing ring (27) are arranged between the output shaft (23) and the case cover hole, the sealing guide sleeve (25), the sealing ring (27) and the first bearing (24) are sleeved on the output shaft (23) in sequence, and the oil seal (26) is sleeved on the sealing guide sleeve (25).
2. A flat wire motor structure with a reducer according to claim 1, characterized in that The output shaft (23) and the sprocket (3) are connected by a spline, a sealing ring groove (251) is formed at the end of the sealing guide sleeve (25), the sealing ring (27) is located in the sealing ring groove (251), one end of the sealing guide sleeve (25) is in contact with the first bearing (24), the sealing ring (27) is in close contact with the bottom of the sealing ring groove (251) and the side of the first bearing (24), the side of the sprocket (3) is in contact with the other end of the sealing guide sleeve (25), and the outer peripheral surface of the oil seal (26) is in contact with the hole wall of the box cover hole.
3. A flat wire motor structure with a reducer according to claim 2, characterized in that A first positioning protrusion (28) is formed on the hole wall of the box cover hole, the side surface of the first bearing (24) contacts the first positioning protrusion (28), and the side surface of the oil seal (26) contacts the first positioning protrusion (28); A stop groove (29) is also formed on the hole wall of the box cover hole. The stop groove (29) is located outside the outer peripheral surface of the oil seal (26). The groove wall of the stop groove (29) is configured as an inclined surface (291).
4. The flat wire motor structure with a reducer according to claim 1, characterized in that A fastening bolt (210) is also threadedly mounted on the end of the output shaft (23); a first retaining ring (211) is sleeved on the rod of the fastening bolt (210); the first retaining ring (211) is an elastic member; and the side surface of the sprocket (3) is in contact with the first retaining ring (211).
5. The flat wire motor structure with a reducer according to claim 1, characterized in that The motor body (1) comprises a motor housing (11), and a front end cover (12) and a rear end cover (13) arranged at two ends of the motor housing (11); the reducer (2) is arranged on the front end cover (12); the reducer (2) comprises a reduction box body (21) integrally formed on the front end cover (12) and protruding outward; a reduction box cover (22) is installed on the reduction box body (21); and the cover hole is located on the reduction box cover (22); A stator (14) and a rotor (15) are arranged in the motor housing (11); the stator (14) comprises a stator core (141) and a plurality of flat wire conductors (142) mounted on the stator core (141); the rotor (15) is located in the stator (14); a motor shaft (16) is passed through the rotor (15); bearing holes are formed on the front end cover (12) and the rear end cover (13); second bearings (17) are arranged in the bearing holes; and two ends of the motor shaft (16) are rotatably mounted on the front end cover (12) and the rear end cover (13) via the second bearings (17).
6. A flat wire motor structure with a reducer according to claim 5, characterized in that The rotor (15) comprises a plurality of layers of rotor assemblies, wherein the rotor assemblies comprise a rotor core (152) and a permanent magnet (151), wherein the surface of the rotor core (152) having the self-locking groove is the front surface, wherein the plurality of layers of the rotor assemblies are stacked along the axial direction and arranged in a positive and negative alternating pattern, wherein the angle between the axes of two adjacent magnetic poles is the magnetic pole angle β, wherein an angle α is present between the center line of the keyway in the inner hole of the rotor core (152) and the center line of the magnetic pole angle β, and the angle α is 1.5°-15°.
7. The flat wire motor structure with a reducer according to claim 5, characterized in that The reduction box cover (22) and the reduction box body (21) are both provided with a third bearing (214); the end of the input shaft is located in the third bearing (214) on the reduction box cover (22); the end of the output shaft (23) is located in the third bearing (214) on the reduction box body (21); the input shaft and the output shaft (23) are both sleeved with a second O-ring (215); when the input shaft, the output shaft (23) and the third bearing (214) are matched, the second O-ring is squeezed and tightly fits against the undercut groove on the input shaft, the undercut groove on the output shaft (23) and the inner rounded corner of the third bearing (214).
8. The flat wire motor structure with a reducer according to claim 5, characterized in that A fastening screw (8) is installed on the motor housing (11), and a positioning groove is formed on the outer peripheral surface of the stator (14), and the end of the fastening screw (8) is inserted into the positioning groove; A sealing glue groove (221) is provided on the contact surface between the reduction gearbox cover (22) and the reduction gearbox body (21); the sealing glue groove (221) is located on the reduction gearbox cover (22); and the sealing glue groove (221) is used to store sealing glue; The reduction box cover (22) is also provided with an oil inlet hole, which is used for injecting and adding gear lubricating oil. The oil inlet hole is provided with an oil inlet bolt (10) for closing and sealing the oil inlet hole.
9. The flat wire motor structure with a reducer according to claim 5, characterized in that A second retaining ring (19) is also provided in the bearing hole of the front end cover (12); the second retaining ring (19) is elastic, and the second bearing (17) is in contact with the second retaining ring (19); A second positioning protrusion (110) is also formed in the bearing hole, and the second retaining ring (19) and the second bearing (17) on the rear end cover (13) are in contact with the second positioning protrusion (110); An O-ring groove is formed on the wall of the bearing hole, and a first O-ring (18) is sleeved on the outer peripheral surface of the second bearing (17), and the first O-ring (18) is located in the O-ring groove.
10. The flat wire motor structure with a reducer according to claim 5, characterized in that Two baffles (7) are sleeved on the motor shaft (16), and the two baffles (7) are respectively located on both sides of the rotor (15). A positioning step (161) is formed on the motor shaft (16), and the side surface of the baffle (7) is in contact with the positioning step (161). A stop washer (162) and a round nut (163) are also sleeved on the motor shaft (16), and the baffle (7) is in contact with the stop washer (162). The two baffles (7) perform axial positioning on the rotor (15).
11. The flat wire motor structure with a reducer according to claim 5, characterized in that One end of the rotor (15) extends into the reducer (2) to serve as the input shaft of the reducer (2); a driving gear (212) and a driven gear (213) are provided in the reduction housing (21); the driving gear (212) is sleeved on the input shaft; the driven gear (213) is integrally formed on the output shaft (23) and meshes with the driving gear (212); the input shaft of the reducer (2) is mounted on the driving gear (212) via a spline; The rear end cover (13) is also provided with a mounting cavity connected to the bearing hole, a rotor position sensor (4) is arranged in the mounting cavity, the rear end cover (13) is provided with a plurality of waterproof joints (5), the front end cover (12) is provided with a waterproof breathable valve (6), and the reduction box cover (22) is provided with a normally closed vent valve (9).