CN220139370U - Motor drive assembly - Google Patents
Motor drive assembly Download PDFInfo
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- CN220139370U CN220139370U CN202321706010.8U CN202321706010U CN220139370U CN 220139370 U CN220139370 U CN 220139370U CN 202321706010 U CN202321706010 U CN 202321706010U CN 220139370 U CN220139370 U CN 220139370U
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- planetary gear
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- 230000007246 mechanism Effects 0.000 claims abstract description 46
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of new energy automobiles, and discloses a motor drive assembly, which comprises the following components: a housing; the motor assembly comprises a stator and a rotor, wherein the stator is fixed in the shell, the rotor is arranged in the stator, and a cavity is formed in the rotor; the differential mechanism is arranged in the cavity and connected with the inner wall surface of the rotor, and the differential mechanism is connected with an output shaft; the output planet row is arranged on at least one side of the motor assembly and is connected with the output shaft. The differential mechanism arranged in the rotor optimizes the part layout of the motor, fully utilizes the internal space of the device, ensures that the space distribution of motor parts is more reasonable, and reduces the gas occupied by the motor parts; meanwhile, the differential mechanism is positioned at the high-speed end, so that the strength of gears of the differential mechanism is not required to be increased, the cost is saved, and the occupied space of the differential mechanism is reduced.
Description
Technical Field
The utility model relates to the technical field of new energy automobiles, in particular to a motor drive assembly.
Background
At present, a traditional driving mode of an electric automobile mostly adopts a motor, a controller and a speed reducer to be integrated together. The speed reducer transmits motor torque through a scheme of two-stage speed reduction and an external differential mechanism, the external differential mechanism enables the occupied volume of the driving assembly to be larger, and the differential mechanism is stressed at a low speed end and can provide enough strength only through larger gears.
Disclosure of Invention
The purpose of the utility model is that: the motor driving assembly optimizes the part layout of the motor through the differential mechanism arranged in the rotor, fully utilizes the internal space of the device, ensures that the space distribution of motor parts is more reasonable, and reduces the gas occupied by the motor parts; meanwhile, the differential mechanism is positioned at the high-speed end, so that the strength of gears of the differential mechanism is not required to be increased, the cost is saved, and the occupied space of the differential mechanism is reduced.
In order to achieve the above object, the present utility model provides a motor drive assembly comprising:
a housing;
the motor assembly comprises a stator and a rotor, wherein the stator is fixed in the shell, the rotor is arranged in the stator, and a cavity is formed in the rotor;
the differential mechanism is arranged in the cavity and connected with the inner wall surface of the rotor, and the differential mechanism is connected with an output shaft;
the output planet row is arranged on at least one side of the motor assembly and is connected with the output shaft.
Compared with the prior art, the motor drive assembly has the beneficial effects that: the motor assembly comprises a stator fixed in the shell and a rotor arranged in the stator, the rotor drives the differential mechanism arranged in the rotor to rotate during rotation, the differential mechanism is connected with an output shaft, the output shaft transmits power to the output planetary row, and the output planetary row is connected with an external part to be driven. The differential mechanism arranged in the rotor optimizes the part layout of the motor, fully utilizes the internal space of the device, ensures that the space distribution of motor parts is more reasonable, and reduces the gas occupied by the motor parts; meanwhile, the differential mechanism is positioned at the high-speed end, so that the strength of gears of the differential mechanism is not required to be increased, the cost is saved, and the occupied space of the differential mechanism is reduced.
According to the motor driving assembly provided by the embodiment of the utility model, two output planetary rows are arranged and are respectively arranged on two sides of the motor assembly, and the output shafts extend out from two sides of the motor assembly and are connected with the two output planetary rows.
According to the motor driving assembly provided by the embodiment of the utility model, the output shaft comprises the integrated differential sun gear and the output sun gear, the differential sun gear is arranged on the outer peripheral surface of the output sun gear, the differential sun gear is connected with the differential mechanism, and the output sun gear is connected with the output planetary row.
The motor driving assembly comprises a differential planet carrier, a planet gear and a planet gear pin, wherein the differential planet carrier is connected with the stator, the planet gear pin is connected to the end face of the differential planet carrier, and the planet gear is sleeved on the outer side of the planet gear pin and meshed with the differential sun gear.
According to the motor driving assembly provided by the embodiment of the utility model, the spline is arranged on the outer peripheral surface of the differential planet carrier, and the first key groove matched with the spline is arranged on the inner peripheral surface of the rotor.
According to the motor driving assembly provided by the embodiment of the utility model, the end face of the differential planet carrier is provided with the through hole, and the output sun wheel passes through the through hole to be connected with the output planet row.
The motor driving assembly comprises a first planet gear, a second planet gear, a planet gear pin and an output planet carrier, wherein the first planet gear is meshed with an output sun gear, the planet gear pin is positioned in a shaft hole of the first planet gear, the second planet gear is sleeved at the other end of the planet gear pin, so that the first planet gear and the second planet gear are coaxially arranged, a pin hole is formed in the output planet carrier, and the planet gear pin extends into the pin hole and is connected with the output planet carrier.
According to the motor driving assembly provided by the embodiment of the utility model, one end of the output planet carrier, which is opposite to the output sun gear, is provided with the output hole, and a second key slot is arranged in the output hole and is used for connecting an external component to be driven.
According to the motor driving assembly provided by the embodiment of the utility model, the outer side of the second planet gear is connected with the outer gear in a meshed manner, and the outer gear is fixed on the inner peripheral surface of the shell.
According to the motor driving assembly provided by the embodiment of the utility model, three first planetary gears, three second planetary gears and three planetary gear pins are arranged, and the three first planetary gears, the three second planetary gears and the three planetary gear pins are uniformly distributed on the outer side of the output sun gear.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
FIG. 1 is a schematic cross-sectional view of a motor drive assembly according to an embodiment of the present utility model;
FIG. 2 is a schematic structural view of a differential portion of a motor drive assembly according to an embodiment of the present utility model;
in the figure, 1, a shell; 11. a motor housing; 12. a speed reducer housing; 13. a motor end cover; 2. a motor assembly; 21. a stator; 22. a rotor; 3. a differential; 31. a differential planet carrier; 311. a spline; 32. a planetary gear; 321. a left planetary gear; 322. a right planetary gear; 33. a planetary gear pin; 4. outputting a planet row; 41. a left output planetary row; 42. a right output planet row; 43. a first planet; 44. a second planet wheel; 45. a planet pin; 46. an output planet carrier; 47. external teeth; 461. an output aperture; 462. a second keyway; 5. an output shaft; 51. a left output shaft; 52. a right output shaft; 53. differential sun gear; 54. and outputting a sun gear.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
As shown in fig. 1 and 2, a motor drive assembly according to a preferred embodiment of the present utility model includes a housing 1, a motor assembly 2, a differential 3, and an output planetary gear 4, wherein the motor assembly 2, the differential 3, and the output planetary gear 4 are disposed in the housing 1, and the housing 1 includes a motor case 11, a reducer case 12, and a motor end cover 13 that are connected to each other, and respectively cover the outer sides of the motor assembly 2 and the output planetary gear 4; the motor assembly 2 comprises a stator 21 and a rotor 22, wherein the stator 21 is fixed in the motor shell 11, a containing cavity is formed in the stator 21, the rotor 22 and a coil are arranged in the containing cavity, the rotor 22 is arranged in the coil, the coil electrifying driving device rotates, and a cavity for containing the differential mechanism 3 is formed in the rotor 22; the differential mechanism 3 is arranged in the cavity, the differential mechanism 3 is connected with the inner wall surface of the rotor 22, so that the differential mechanism 3 can rotate along with the rotation of the rotor 22, the differential mechanism 3 is connected with the output shaft 5, and the output shaft 5 can rotate along with the rotation of the differential mechanism 3, so that power is output to the output planetary rows 4; the output planetary row 4 is disposed at one side or both sides of the motor assembly 2, the output planetary row 4 is connected to the output shaft 5 and rotates with the rotation of the output shaft 5, the output shaft 5 transmits torsion to the output planetary row 4, and the output planetary row 4 transmits torsion to an external part to be driven.
When the motor drive assembly works, the coil is electrified, the rotor 22 rotates, the device drives the differential mechanism 3 arranged in the rotor 22 to rotate, the differential mechanism 3 transmits torsion to the output planetary rows 4 through the output shaft 5, and the output planetary rows 4 output the torsion to external parts to be driven. The motor driving assembly optimizes the part layout of the motor through the differential mechanism 3 arranged in the rotor 22, fully utilizes the internal space of the device, ensures that the space distribution of motor parts is more reasonable, and reduces the gas occupied by the motor parts; meanwhile, the differential mechanism 3 is positioned at the high-speed end, so that the strength of gears of the differential mechanism 3 is not required to be increased, the cost is saved, and the occupied space of the differential mechanism 3 is reduced.
In some embodiments of the present utility model, the output planetary rows 4 are provided with two output planetary rows 41 and 42, which are respectively arranged at two sides of the motor assembly 2, and the two output planetary rows 4 are symmetrically arranged at two sides of the motor assembly 2 in the horizontal direction, so that two ends of the motor assembly 2 can be connected with external components to be driven, which is beneficial for the motor assembly 2 to act on various output forms; the output shaft 5 is also in a split arrangement, the output shaft 5 comprises a left output shaft 51 and a right output shaft 52, and the left output shaft 5 and the right output shaft 5 in the split arrangement extend from two sides of the motor assembly 2 and are connected with the left output planetary row 41 and the right output planetary row 42 respectively, so that the left output planetary row 41 and the right output planetary row 42 do not affect each other.
In some embodiments of the present utility model, the output shaft 5 includes an integrated differential sun gear 53 and an output sun gear 54, the differential sun gear 53 is sleeved on the outer peripheral surface of the output sun gear 54, the differential sun gear 53 and the output sun gear 54 coaxially rotate, the differential sun gear 53 is connected with the differential 3 and can rotate along with the rotation of the differential 3, and drives the output sun gear 54 to rotate, the output sun gear 54 is connected with the output planet row 4, the torque is transmitted to the output planet row 4 when the output sun gear 54 rotates, and the integrated coaxially arranged differential sun gear 53 and output sun gear 54 has a simple structure, and the torque output is stable.
In some embodiments of the present utility model, the differential 3 includes a differential planet carrier 31, planet gears 32 and planet gear pins 33, the differential planet carrier 31 is disposed at two ends of the differential 3, the outer peripheral surface of the differential planet carrier 31 is connected with the rotor 22, two ends of the planet gear pins 33 are respectively fixedly connected to opposite end surfaces of the two differential planet carriers 31, and the planet gears 32 are sleeved outside the planet gear pins 33 and are meshed with the differential sun gear 53; specifically, the planetary gear 32 includes a left planetary gear 321 and a right planetary gear 322, which are respectively connected to the left output shaft 51 and the right output shaft 52, at least three of the left planetary gear 321 and the right planetary gear 322 are respectively provided, and at least three of the planetary gear pins 33 are correspondingly provided. When the rotor 22 rotates, the differential planet carrier 31 rotates along with the rotation, the planet gears 32 rotate around the differential sun gear 53 under the drive of the planet gear pins 33, torque is transmitted to the differential sun gear 53 in the rotating process, and the differential sun gear 53 drives the output sun gear 54 to output torque. The differential 3 has a simple structure and can stably output torsion to the output planetary rows 4.
In some embodiments of the present utility model, the outer peripheral surface of the differential planet carrier 31 is provided with a plurality of splines 311 which are uniformly distributed, the inner peripheral surface of the rotor 22 is provided with a first key slot which is matched with the splines 311, and the connection between the differential planet carrier 31 and the rotor 22 is firm through the matching of the splines 311 and the key slots, so that the differential planet carrier is not easy to slip in the rotation process, and the reliability of the torque transmission process is ensured.
In some embodiments of the present utility model, the end surfaces of the differential planet carriers 31 on both sides are each provided with a through hole provided in the center of the end surface of the differential planet carrier 31 so that the output sun gear 54 passes through the through hole to connect the left output planet row 41 and the right output planet row 42.
In some embodiments of the present utility model, each of the left output planet row 41 and the right output planet row 42 includes a first planet 43, a second planet 44, a planet pin 45 and an output planet carrier 46, where the first planet 43 is located outside the output sun 54 and is meshed with the output sun 54, the planet pin 45 is located in a shaft hole of the first planet 43 and can rotate around the output sun 54 along with rotation of the first planet 43, the second planet 44 is sleeved at the other end of the planet pin 45, so that the first planet 43 and the second planet 44 are coaxially arranged, a pin hole is provided on the output planet carrier 46, the planet pin 45 extends into the pin hole and is connected with the output planet carrier 46, the output planet carrier 46 is driven to rotate when the planet pin 45 rotates, the output planet carrier 46 transmits torsion to an external component to be driven, and the planet pin 45 is driven to drive the output planet carrier 46 through the first planet 43, so that the structure of the output planet 4 is simple, and the torsion process is stable and reliable.
In some embodiments of the present utility model, an output hole 461 is disposed at an end of the output planet carrier 46 facing away from the output sun gear 54, a second key slot 462 is disposed in the output hole 461, and the second key slot 462 is used for connecting an external component to be driven, and the external component to be driven is connected with the output planet carrier 46 through a spline 311, so that the connection between the external component to be driven and the output planet carrier 46 is firm, and slipping is not easy in the rotation process, and reliability of the torque transmission process is ensured.
In some embodiments of the present utility model, the outer side of the second planet gear 44 is engaged with and connected with an outer ring gear 47, the rotation track of the second planet gear 44 is defined by the outer ring gear 47, the outer ring gear 47 is fixed on the inner peripheral surface of the speed reducer casing 12, the arrangement of the outer ring gear 47 limits the rotation range of the output planet row 4 inside the speed reducer casing 12, so that axial errors in rotation of the output planet row 4 in the torque output process are prevented, and stable torque output of the output planet row 4 is ensured.
In some embodiments of the present utility model, the first planetary gears 43, the second planetary gears 44 and the planetary gear pins 45 are all provided with three, the three first planetary gears 43, the second planetary gears 44 and the planetary gear pins 45 are uniformly distributed on the outer side of the output sun gear 54, and the uniformly distributed first planetary gears 43, second planetary gears 44 and planetary gear pins 45 make the connection between the output sun gear 54 and the output planet carrier 46 stable, and the torque transmission is smooth and reliable.
The working process of the utility model is as follows: the motor assembly 2 comprises a stator 21 fixed in the shell 1 and a rotor 22 arranged in the stator 21, the rotor 22 rotates to drive the differential mechanism 3 arranged in the rotor 22 to rotate, the differential mechanism 3 is connected with an output shaft 5, the output shaft 5 transmits power to the output planetary row 4, and the output planetary row 4 is connected with an external part to be driven.
In summary, the embodiment of the utility model provides a motor driving assembly, which optimizes the part layout of a motor through a differential mechanism 3 arranged in a rotor 22, fully utilizes the internal space of the device, ensures that the space distribution of motor parts is more reasonable, and reduces the gas occupied by the motor parts; meanwhile, the differential mechanism 3 is positioned at the high-speed end, so that the strength of gears of the differential mechanism 3 is not required to be increased, the cost is saved, and the occupied space of the differential mechanism 3 is reduced.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.
Claims (10)
1. A motor drive assembly, comprising:
a housing;
the motor assembly comprises a stator and a rotor, wherein the stator is fixed in the shell, the rotor is arranged in the stator, and a cavity is formed in the rotor;
the differential mechanism is arranged in the cavity and connected with the inner wall surface of the rotor, and the differential mechanism is connected with an output shaft;
the output planet row is arranged on at least one side of the motor assembly and is connected with the output shaft.
2. The motor drive assembly of claim 1, wherein: the output planetary rows are arranged at two sides of the motor assembly respectively, and the output shafts extend out from two sides of the motor assembly and are connected with the two output planetary rows.
3. The motor drive assembly of claim 2, wherein: the output shaft comprises an integrated differential sun gear and an output sun gear, wherein the differential sun gear is arranged on the outer peripheral surface of the output sun gear, the differential sun gear is connected with the differential mechanism, and the output sun gear is connected with the output planet row.
4. A motor drive assembly as claimed in claim 3, wherein: the differential mechanism comprises a differential planet carrier, a planet gear and a planet gear pin, wherein the differential planet carrier is connected with the stator, the planet gear pin is connected with the end face of the differential planet carrier, and the planet gear is sleeved on the outer side of the planet gear pin and meshed with the differential sun gear.
5. The motor drive assembly of claim 4, wherein: the differential planet carrier is characterized in that a spline is arranged on the outer peripheral surface of the differential planet carrier, and a first key groove matched with the spline is arranged on the inner peripheral surface of the rotor.
6. The motor drive assembly of claim 4, wherein: and a through hole is formed in the end face of the differential planet carrier, and the output sun wheel passes through the through hole to be connected with the output planet row.
7. A motor drive assembly as claimed in claim 3, wherein: the planetary gear transmission device comprises an output planetary gear row, a planetary gear transmission mechanism and a planetary gear transmission mechanism, wherein the output planetary gear row comprises a first planetary gear, a second planetary gear, a planetary gear pin and an output planetary gear frame, the first planetary gear is meshed with an output sun gear, the planetary gear pin is located in a shaft hole of the first planetary gear, the second planetary gear is sleeved at the other end of the planetary gear pin, so that the first planetary gear and the second planetary gear are coaxially arranged, a pin hole is formed in the output planetary gear frame, and the planetary gear pin stretches into the pin hole to be connected with the output planetary gear frame.
8. The motor drive assembly of claim 7, wherein: the output planet carrier is provided with the output hole in the one end of being away from output sun gear, be provided with the second keyway in the output hole, the second keyway is used for connecting the external component of waiting to drive.
9. The motor drive assembly of claim 7, wherein: the outer side of the second planet wheel is connected with an outer gear in a meshed mode, and the outer gear is fixed on the inner peripheral surface of the shell.
10. The motor drive assembly of claim 7, wherein: the first planet gears, the second planet gears and the planet gear pins are all provided with three, and the three first planet gears, the second planet gears and the planet gear pins are uniformly distributed on the outer sides of the output sun gears.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321706010.8U CN220139370U (en) | 2023-06-30 | 2023-06-30 | Motor drive assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321706010.8U CN220139370U (en) | 2023-06-30 | 2023-06-30 | Motor drive assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220139370U true CN220139370U (en) | 2023-12-05 |
Family
ID=88962870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321706010.8U Active CN220139370U (en) | 2023-06-30 | 2023-06-30 | Motor drive assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220139370U (en) |
-
2023
- 2023-06-30 CN CN202321706010.8U patent/CN220139370U/en active Active
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Effective date of registration: 20240313 Granted publication date: 20231205 |