Integrated electric drive assembly, electric drive axle and vehicle

Abstract

The utility model provides an integrated electric drive assembly, electric drive axle and vehicle, including motor controller, drive motor, decelerator and electromagnetic brake, the three-phase output row of motor controller is connected with drive motor, drive motor includes stator, rotor and motor shaft, motor shaft and rotor coaxial connection, and the stator is connected with the rotor. The rotor and the motor shaft are rotatably arranged in the stator, a rear bearing is arranged at the rear end of the motor shaft, a front bearing is arranged at the front end of the motor shaft, driving teeth are arranged on the side, close to the rear bearing, of the front bearing of the motor shaft, a braking part is arranged on the side, away from the rear bearing, of the front bearing of the motor shaft, and the braking part is connected with an electromagnetic brake. The speed reducer comprises a reduction gear set, and the reduction gear set is meshed with the driving teeth. The electromagnetic brake and the motor shell are located at the two ends of the speed reducer correspondingly, then the gravity centers of the driving motor and the speed reducer can be balanced, and the problems that a motor end cantilever is too long, and the structural strength is affected are solved.

Description

Technical Field

[0001] The utility model relates to the field of new energy, and in particular to an integrated electric drive assembly, an electric drive bridge and a vehicle. Background Art

[0002] New energy vehicles do not generate power by burning gasoline or diesel, so they have many characteristics such as environmental protection and low pollution. With the vigorous promotion and application of new energy power generation such as hydropower, wind power, solar power and nuclear power, many new energy vehicles are gradually being promoted and applied, such as new energy electric cars, new energy electric buses, new energy electric trucks, new energy electric cleaning vehicles, new energy electric rail vehicles, new energy electric flying vehicles, new energy electric shipping vehicles, etc.

[0003] New energy vehicles are equipped with an electric drive assembly, which includes a drive motor, a reducer and an electromagnetic brake. The electromagnetic brake is a device that uses electromagnetic force to achieve braking function. It is mainly composed of electromagnets, brake discs, brake springs and other components. When the electromagnet is energized, the electromagnetic force generated attracts the brake disc, making the brake disc fit tightly against the brake hub, thereby achieving the braking function.

[0004] When the vehicle starts, the electromagnetic brake is energized at the same time, and the electromagnetic brake is in a disengaged and released state, driving the motor to rotate and drive the vehicle to work. When the vehicle stops, in order to prevent the vehicle from sliding, the electromagnetic brake is powered off, and the electromagnetic brake is in a braking state, and the vehicle cannot move.

[0005] Therefore, the layout of the electromagnetic brake is not only related to how to achieve efficient automatic parking, but also to the overall balance and smooth operation of the electric drive assembly. Utility Model Content

[0006] The first object of the present utility model is to provide an efficient and balanced integrated electric drive assembly.

[0007] The second object of the present utility model is to provide an electric drive axle having the above electric drive assembly.

[0008] A third object of the present invention is to provide a vehicle having the above-mentioned electric drive assembly.

[0009] In order to achieve the first purpose of the utility model, the utility model provides an integrated electric drive assembly, including a motor controller, a drive motor, a reducer and an electromagnetic brake. The three-phase output row of the motor controller is connected to the drive motor. The drive motor includes a stator, a rotor and a motor shaft. The motor shaft is coaxially connected to the rotor, and the rotor and the motor shaft are rotatably arranged in the stator; the rear end of the motor shaft is provided with a rear bearing, the front end of the motor shaft is provided with a front bearing, the motor shaft is provided with a driving tooth on the side of the front bearing close to the rear bearing, and the motor shaft is provided with a braking part on the side of the front bearing away from the rear bearing, the braking part is connected to the electromagnetic brake, and the reducer includes a reduction gear set, and the reduction gear set is engaged with the driving tooth.

[0010] A further solution is that the drive motor includes a motor housing and a rear end cover of the motor, the stator, rotor and motor shaft are arranged in the motor accommodating cavity of the motor housing, the rear end cover of the motor covers the rear end of the motor accommodating cavity and is fixedly connected to the motor housing, and the rear bearing is arranged in the rear end cover of the motor; the reducer includes a reducer housing, the reducer housing forms a reduction accommodating cavity, the reduction gear set is arranged in the reduction accommodating cavity, the reducer housing is penetrated by an input hole, the input hole is connected with the reduction accommodating cavity, the front end of the motor shaft passes through the input hole, the front bearing and the driving tooth are located in the input hole, and the electromagnetic brake and the braking part are located outside the input hole.

[0011] A further solution is that oil seals are respectively provided at both ends of the input hole, and the motor shaft passes through the two oil seals.

[0012] A further solution is that a brake flat key is provided on the braking part, and the brake flat key is connected to the gear sleeve of the electromagnetic brake.

[0013] A further solution is that a rotary transformer is provided in the rear end cover of the motor, the rotary transformer is connected to the rear end of the motor shaft, and the rotary transformer is located on the outer side of the rear bearing.

[0014] A further solution is that the reduction gear set includes a first reduction gear, a second reduction gear and an output shaft gear, and the driving gear, the first reduction gear, the second reduction gear and the output shaft gear are meshed and connected in sequence.

[0015] In order to achieve the second purpose of the utility model, the utility model provides an electric drive axle, including an electric drive assembly, a left axle assembly and a right axle assembly as described above, the left axle assembly including a left axle tube and a left half-shaft, the right axle assembly including a right axle tube and a right half-shaft, the left axle tube and the right axle tube are respectively located on the horizontal sides of the reducer housing and are respectively connected to the reducer housing, and the left half-shaft and the right half-shaft are respectively connected to the reduction gear set.

[0016] A further solution is that the left axle assembly includes a left brake drum, the right axle assembly includes a right brake drum, the left brake drum is connected to the left half-shaft, and the right brake drum is connected to the right half-shaft.

[0017] A further solution is that the electric drive axle includes a differential, which is connected between the reduction gear set, the left half shaft and the right half shaft.

[0018] In order to achieve the third purpose of the present invention, the present invention provides a vehicle including the electric drive assembly according to the above solution.

[0019] The beneficial effect of the present invention is that the electromagnetic brake, front bearing, drive gear and rear bearing are arranged in sequence along the axial direction of the motor shaft, so the electromagnetic brake directly brakes the motor shaft, thereby realizing the automatic parking function while achieving efficient braking. Moreover, since the electromagnetic brake is arranged at the front end of the motor shaft and is located outside the reducer housing, and the electromagnetic brake and the motor housing are respectively located at both ends of the input hole, the center of gravity of the drive motor and the reducer can be balanced, reducing the problem of excessive cantilever length at the motor end and affected structural strength. Furthermore, the reducer and the bridge tube are assembled separately, and compared with the integral axle, the split structure of the reducer and the bridge tube is more convenient to process, can achieve more ideal precision, and is conducive to suppressing gear noise. According to the requirements of different vehicle models, only different bridge tubes need to be replaced, and its versatility is stronger than that of the integral axle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of an embodiment of the electric drive axle of the present utility model.

[0021] Figure 2 This is a diagram of the internal structure of the electric drive assembly in the embodiment of the electric drive axle of the present utility model.

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0023] Reference Figure 1 and Figure 2The electric drive axle includes an electric drive assembly, a differential 26, a left axle assembly and a right axle assembly. The electric drive assembly includes a motor controller 1, a drive motor 12, a reducer 40 and an electromagnetic brake 6. The motor controller 1 is arranged on the radial outside of the motor housing 121. The three-phase output row 3 of the motor controller 1 is connected to the drive motor 12. The drive motor 12 includes a motor housing 121, a motor rear end cover 122, a stator 27, a rotor 141 and a motor shaft 142. The motor shaft 142 is coaxially connected to the rotor 141. The rotor 141 and the motor shaft 142 are rotatably arranged in the stator 27. The stator 27, the rotor 141 and the motor shaft 142 are arranged in the motor accommodating cavity of the motor housing 121. The rear end 143 of the motor shaft 142 is provided with a rear bearing 13, and the front end 144 of the motor shaft 142 is provided with a front bearing 16. The rear end cover 122 of the motor covers the rear end 143 of the motor accommodating cavity and is fixedly connected to the motor housing 121. The rear bearing 13 is arranged in the rear end cover 122 of the motor. A rotary transformer 28 is provided in the rear end cover 122 of the motor. The rotary transformer 28 is connected to the rear end 143 of the motor shaft 142, and the rotary transformer 28 is located on the outside of the rear bearing 13.

[0024] The reducer 40 includes a reducer housing and a reduction gear set. The reducer housing includes a right reducer housing 4 and a left reducer housing 5. The right reducer housing 4 and the left reducer housing 5 are interlocked and enclosed to form a reduction accommodating chamber. The reduction gear set is arranged in the reduction accommodating chamber. The right reducer housing 4 and the left reducer housing 5 are penetrated by an input hole 51. The input hole 51 is communicated with the reduction accommodating chamber. The motor shaft 142 is provided with a driving tooth 145 on the side of the front bearing 16 close to the rear bearing 13. The motor shaft 142 is provided with a brake part 19 on the side of the front bearing 16 away from the rear bearing 13. The front end 144 of the motor shaft 142 passes through the input hole 51. The bearing 16 and the driving tooth 145 are located in the input hole 51, and the two ends of the input hole 51 are respectively provided with an oil seal 15 and an oil seal 17. The motor shaft 142 passes through the oil seal 15 and the oil seal 17. The brake key 18 is provided on the braking part 19. The brake key 18 is connected to the gear sleeve of the electromagnetic brake 6. The electromagnetic brake 6 and the braking part 19 are located outside the input hole 51. It can be seen that the gear sleeve, braking part 19, front bearing 16, driving tooth 145, rear bearing 13 and rotary transformer 28 of the electromagnetic brake 6 in this case are arranged in sequence along the axial direction of the motor shaft 142, which can balance the center of gravity of the drive motor and the reducer and reduce the excessive length of the cantilever at the motor end.

[0025] The reduction gear set includes a first reduction gear 20, a second reduction gear 21 and an output shaft gear 25. The driving gear 145, the first reduction gear 20, the second reduction gear 21 and the output shaft gear 25 are meshed and connected in sequence. The second reduction gear 21 is supported by a bearing 22, and the output shaft gear 25 is supported by an output shaft bearing 24. The left axle assembly includes a left axle tube 71, a left half shaft 81 and a left brake drum 73. The right axle assembly includes a right axle tube 72, a right half shaft 82 and a right brake drum 74. The differential 26 is connected to the output shaft gear 25, the left half shaft 81 and the right half shaft. The shafts 82, that is, the internal splines of the output shaft gear 25, the internal splines of the differential 26 are connected to the external splines of the left half-shaft 81 and the external splines of the right half-shaft 82, the left brake drum 73 is connected to the left half-shaft 81, the right brake drum 74 is connected to the right half-shaft 82, the left bridge tube 71 and the right bridge tube 72 are respectively located on the horizontal sides of the reducer housing and are respectively connected to the reducer housing, the left bridge tube 71 is connected to the left reducer housing 5, the right bridge tube 72 is connected to the right reducer housing 4, the two half-shaft oil seals 23, the left half-shaft 81, and the right half-shaft 82 constitute the power output end sealing structure.

[0026] Of course, in addition to this embodiment, there are many ways to arrange the reduction gear set. The corresponding reduction ratio and reduction gear can be set according to actual product requirements, and the differential can also be set according to requirements. The left half shaft and the right half shaft can also be directly connected to the reduction gear set.

[0027] The vehicle includes an electric drive assembly as described above, and the vehicle can be a new energy electric car, a new energy electric bus, a new energy electric truck, a new energy electric cleaning vehicle, a new energy electric rail vehicle, a new energy electric flying vehicle, a new energy electric shipping vehicle, etc.

[0028] New energy vehicles are equipped with an electric drive assembly, which includes a drive motor, a reducer and an electromagnetic brake. The electromagnetic brake is a device that uses electromagnetic force to achieve braking function. It is mainly composed of electromagnets, brake discs, brake springs and other components. When the electromagnet is energized, the electromagnetic force generated attracts the brake disc, making the brake disc fit tightly against the brake hub, thereby achieving the braking function.

[0029] When the vehicle starts, the electromagnetic brake is energized, disengaging the brake and allowing the motor to rotate, driving the vehicle. When the vehicle stops, the electromagnetic brake is de-energized to prevent the vehicle from sliding, locking it in place and immobilizing the vehicle. This arrangement of the electromagnetic brake enables efficient automatic parking and improves the overall balance and smooth operation of the electric drive assembly.

[0030] As can be seen from the above, the electromagnetic brake, front bearing, drive gear and rear bearing of this case are arranged in sequence along the axial direction of the motor shaft. Therefore, the braking of the electromagnetic brake directly brakes the motor shaft, thereby realizing the automatic parking function while achieving efficient braking. Moreover, since the electromagnetic brake is arranged at the front end of the motor shaft and is located on the outside of the reducer housing, and the electromagnetic brake and the motor housing are respectively located at the two ends of the input hole, the center of gravity of the drive motor and the reducer can be balanced, reducing the problem of excessive cantilever at the motor end and affected structural strength.

Claims

1. An integrated electric drive assembly, comprising a motor controller, a drive motor, a reducer, and an electromagnetic brake, wherein a three-phase output bus of the motor controller is connected to the drive motor, the drive motor comprising a stator, a rotor, and a motor shaft, the motor shaft being coaxially connected to the rotor, and the rotor and the motor shaft being rotatably disposed within the stator; Its characteristics are: A rear bearing is provided at the rear end of the motor shaft, a front bearing is provided at the front end of the motor shaft, a driving tooth is provided on the side of the front bearing close to the rear bearing, and a braking part is provided on the side of the front bearing away from the rear bearing. The braking part is connected to the electromagnetic brake, and the reducer includes a reduction gear set, which is engaged with the driving tooth.

2. The electric drive assembly according to claim 1, characterized in that: The drive motor includes a motor housing and a motor rear end cover, the stator, the rotor and the motor shaft are arranged in a motor accommodating cavity of the motor housing, the motor rear end cover covers the rear end of the motor accommodating cavity and is fixedly connected to the motor housing, and the rear bearing is arranged in the motor rear end cover; The reducer includes a reducer housing, which forms a reduction accommodating chamber. The reduction gear set is arranged in the reduction accommodating chamber. An input hole is provided through the reducer housing, which is connected to the reduction accommodating chamber. The front end of the motor shaft passes through the input hole, the front bearing and the driving tooth are located in the input hole, and the electromagnetic brake and the braking part are located outside the input hole.

3. The electric drive assembly according to claim 2, characterized in that: Oil seals are respectively provided at both ends of the input hole, and the motor shaft passes through the two oil seals.

4. The electric drive assembly according to claim 2, characterized in that: The braking part is provided with a brake flat key, and the brake flat key is connected to the gear sleeve of the electromagnetic brake.

5. The electric drive assembly according to claim 2, characterized in that: A rotary transformer is provided in the rear end cover of the motor. The rotary transformer is connected to the rear end of the motor shaft and is located on the outer side of the rear bearing.

6. The electric drive assembly according to any one of claims 1 to 5, characterized in that: The reduction gear set includes a first reduction gear, a second reduction gear and an output shaft gear, and the driving gear, the first reduction gear, the second reduction gear and the output shaft gear are meshed and connected in sequence.

7. Electric drive axle, characterized in that, It comprises an electric drive assembly, a left axle assembly and a right axle assembly as described in any one of claims 2 to 6 above, the left axle assembly comprising a left axle tube and a left half-shaft, the right axle assembly comprising a right axle tube and a right half-shaft, the left axle tube and the right axle tube being respectively located on both horizontal sides of the reducer housing and respectively connected to the reducer housing, and the left half-shaft and the right half-shaft being respectively connected to the reduction gear set.

8. The electric drive axle according to claim 7, characterized in that: The left axle assembly includes a left brake drum, and the right axle assembly includes a right brake drum. The left brake drum is connected to the left half-shaft, and the right brake drum is connected to the right half-shaft.

9. The electric drive axle according to claim 7, characterized in that: The electric drive axle includes a differential connected between the reduction gear set, the left half shaft, and the right half shaft.

10. A means of transport, characterized in that It comprises the electric drive assembly according to any one of claims 1 to 9 above.

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