CN214314928U - Differential driving system of electric vehicle - Google Patents
Differential driving system of electric vehicle Download PDFInfo
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- CN214314928U CN214314928U CN202120178036.4U CN202120178036U CN214314928U CN 214314928 U CN214314928 U CN 214314928U CN 202120178036 U CN202120178036 U CN 202120178036U CN 214314928 U CN214314928 U CN 214314928U
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Abstract
The utility model discloses a differential driving system of an electric vehicle, which comprises a motor component, a supporting component and a differential device; the motor assembly comprises a motor shell and a motor shaft cylinder; the inner wall of the motor shell is provided with a stator; a support shell is arranged on the outer side of the right end of the motor shell and forms an inner cavity with the support shell; the left part of the motor shaft cylinder is rotatably arranged in the motor shell and is provided with a rotor, and the right part of the motor shaft cylinder is positioned in the inner cavity and is connected with the input end of the differential device through a speed reduction assembly; the supporting component comprises a second half shaft and a first half shaft, the middle part of the first half shaft penetrates through the motor shaft barrel, one end of the first half shaft and one end of the second half shaft are correspondingly connected with the output end of the differential device, and the other end of the first half shaft and the other end of the second half shaft are correspondingly connected with a pair of wheels. This electric motor car differential actuating system, simple structure not only through motor drive with slow down, differential integration in an organic whole for overall structure is compacter, avoids traditional motor output end and reduction gear, differential mechanism to be connected the big condition of occupation space, realizes coaxial line output moreover, realizes the high-speed stable rotation of motor.
Description
Technical Field
The utility model relates to an electric motor car drive field, concretely relates to electric motor car differential actuating system.
Background
The traditional electric vehicle drive drives the rotor to rotate by a rotating magnetic field generated by the stator, so that the rotor realizes power output, but in order to realize speed reduction and torque increase, the output end of the motor is often connected with a speed reducer, and although the speed reducer is convenient to assemble and can work independently, the speed reducer is mostly in an eccentric structure, namely the output end of the motor and the output end of the speed reducer are not on the same axis, so that the occupied space is large due to eccentric output, and the structure is not compact;
in addition, in order to ensure the operation of the wheels of the electric vehicle at different rotating speeds, a differential mechanism structure needs to be added, but in a connection relation, namely the output end of the speed reducer is connected with the differential mechanism, so that the whole structure is complex, the occupied space is large, and the electric vehicle is not suitable for high-speed stable rotation.
Disclosure of Invention
The utility model provides an electric motor car differential actuating system, simple structure not only through motor drive with slow down, differential integration in an organic whole for overall structure is compacter, avoids traditional motor output end and reduction gear, differential mechanism to be connected the big condition of occupation space, realizes coaxial line output moreover, realizes the high-speed stable rotation of motor.
In order to achieve the purpose, the differential driving system of the electric vehicle comprises a motor assembly, a differential driving device and a differential driving device, wherein the motor assembly comprises a motor shell and a motor shaft barrel; the left end of the motor shell is opened and is detachably arranged through a motor sealing cover, and a stator is arranged on the inner wall of the motor shell;
the differential device also comprises a support assembly and a differential device;
a support shell is arranged on the outer side of the right end of the motor shell and forms an inner cavity with the support shell; the left part of the motor shaft cylinder is rotatably arranged in the motor shell and is provided with a rotor, and the right part of the motor shaft cylinder is positioned in the inner cavity and is connected with the input end of the differential device through a speed reduction assembly;
the supporting component comprises a second half shaft and a first half shaft, the middle part of the first half shaft penetrates through the motor shaft barrel, one end of the first half shaft and one end of the second half shaft are correspondingly connected with the output end of the differential device, and the other end of the first half shaft and the other end of the second half shaft are correspondingly connected with a pair of wheels.
Furthermore, a first gear connected with a speed reduction assembly is arranged at the right end of the motor shaft cylinder, and the differential device comprises a differential shell and a differential assembly positioned in the differential shell; the differential shell is rotatably arranged in the inner cavity, and a second gear connected with the speed reduction assembly is arranged on the outer side of the inner cavity.
Further, the differential assembly comprises a central shaft, a pair of planet gears and a pair of sun gears, wherein the pair of planet gears are oppositely arranged on the differential shell through the central shaft and are meshed and connected with the pair of sun gears which are oppositely arranged to form a differential structure;
the pair of sun gears are correspondingly connected with the first half shaft and the second half shaft.
Furthermore, the speed reduction assembly comprises a duplicate gear, the duplicate gear is rotatably installed in the inner cavity and is respectively meshed with the first gear and the second gear, and the number of teeth at one end, meshed with the first gear, of the duplicate gear is larger than that of teeth at one end, meshed with the second gear, of the duplicate gear.
The oil seal assembly comprises a first oil seal, a second oil seal and a third oil seal;
the first oil seal is arranged at the contact position of the second half shaft penetrating through the support shell, the second oil seal is arranged at the contact position of the first half shaft penetrating through the motor shell, and the third oil seal is arranged at the contact position of the motor shaft barrel penetrating through the motor shell.
Furthermore, an oil filling hole communicated with the inner cavity is formed in the supporting shell.
Furthermore, the motor shaft cylinder is rotatably installed on the motor shell through a bearing, and the differential shell is rotatably installed on the support shell through a bearing.
Compared with the prior art, the differential driving system of the electric vehicle has the following advantages:
(1) the utility model discloses because the rotor drives the rotation of motor shaft section of thick bamboo, through reducing the subassembly with power transmission to differential gear on, consequently not only realize the speed reduction increase of torsion effect to electric motor car drive, guarantee its differential drive, and the support shell directly is connected with motor casing and forms the inner chamber, with the motor subassembly with the integration of reducing the subassembly, differential gear together, make overall structure compacter, occupation space is little, avoid traditional motor output end suit at the reduction gear, and with the differential gear connection cause the condition that occupation space is big;
(2) the utility model discloses because one end through first semi-axis and second semi-axis corresponds and is connected with the differential subassembly, the other end corresponds and is connected with a pair of wheel, consequently not only guarantee the differential and travel under the condition that does not influence the drive, realize whole stable support, and first semi-axis passes motor shaft section of thick bamboo moreover, and motor power output's motor shaft section of thick bamboo is unanimous with the axis of differential output driven first semi-axis, second semi-axis, avoids traditional drive and reduction gear, differential mechanism to be connected the condition that causes power eccentric output, realizes the high-speed stable rotation of motor;
(3) the utility model discloses because set up the first oil blanket between second semi-axis and the support shell, set up the second oil blanket between first semi-axis and the motor casing, the third oil blanket between motor shaft section of thick bamboo and the motor casing, therefore accessible first oil blanket, second oil blanket, the third oil blanket realizes sealing it, prevents that the dust from entering and influencing power drive, can be equipped with the oil filler point with inner chamber intercommunication in addition on the support shell, through pouring into lubricating oil into the intracavity from the oil filler point, realize lubricating the speed reduction subassembly of inner chamber, make its rotation smoother, life is longer;
this electric motor car differential actuating system, simple structure not only through motor drive with slow down, differential integration in an organic whole for overall structure is compacter, avoids traditional motor output end and reduction gear, differential mechanism to be connected the big condition of occupation space, realizes coaxial line output moreover, realizes the high-speed stable rotation of motor.
Drawings
Fig. 1 is an overall schematic view of the present invention;
FIG. 2 is a schematic view of the differential assembly of the present invention;
FIG. 3 is a front view of the differential assembly of the present invention;
in the figure: 11. the motor comprises a motor shell, 12, a rotor, 13, a stator, 14, a motor cover, 2, a support shell, 31, a motor shaft barrel, 32, a duplicate gear, 33, a first gear, 4, a differential assembly, 41, a differential shell, 43, a second gear, 44, a planetary gear, 45, a sun gear, 46, a central shaft, 51, a first half shaft, 52, a second half shaft, 61, a first oil seal, 62, a second oil seal, 63 and a third oil seal.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, the differential drive system of the electric vehicle comprises a motor assembly, a support assembly and a differential device;
the motor assembly comprises a motor shell 11 and a motor shaft cylinder 31;
the left end of the motor shell 11 is opened and is detachably arranged through a motor sealing cover 14, the inner wall of the motor shell is provided with a stator 13, and the outer side of the right end of the motor shell is provided with a support shell 2 and forms an inner cavity with the support shell;
the left part of the motor shaft cylinder 31 is rotatably arranged in the motor shell 11 and is provided with a rotor 12, and the right part is positioned in the inner cavity and is connected with the input end of the differential device through a speed reduction assembly;
the support assembly comprises a second half shaft 52 and a first half shaft 51, the middle part of the first half shaft 51 penetrates through the motor shaft barrel 31, one end of the first half shaft 51 and one end of the second half shaft 52 are correspondingly connected with the output end of the differential device, and the other ends of the first half shaft 51 and the second half shaft are correspondingly connected with a pair of wheels;
as shown in fig. 2 and 3, further, the right end of the motor shaft cylinder 31 is provided with a first gear 33 connected with a speed reduction assembly, and the differential device comprises a differential housing 41 arranged in an inner cavity and a differential assembly 4 positioned in the differential housing 41; the differential shell 41 is rotatably arranged in the inner cavity, and the outer side of the differential shell is provided with a second gear 43 connected with the speed reducing assembly;
further, the differential assembly 4 includes a central shaft 46, a pair of planet gears 44 and a pair of sun gears 45, the pair of planet gears 44 are oppositely arranged on the differential housing 41 through the central shaft 46 and are meshed and connected with the pair of sun gears 45 which are oppositely arranged, so as to form a differential structure;
the pair of sun gears 45 are correspondingly connected with the first half shaft 51 and the second half shaft 52;
further, the speed reducing assembly comprises a duplicate gear 32, the duplicate gear 32 is rotatably installed in the inner cavity and is respectively in meshing connection with the first gear 33 and the second gear 43, and the number of teeth at one end, meshed and connected with the first gear 33, of the duplicate gear 32 is greater than that at one end, meshed and connected with the second gear 43, of the duplicate gear 32;
further, the device also comprises an oil seal assembly, wherein the oil seal assembly comprises a first oil seal 61, a second oil seal 62 and a third oil seal 63;
a first oil seal 61 is provided at the contact between the second half shaft 52 passing through the support case 2, a second oil seal 62 is provided at the contact between the first half shaft 51 passing through the motor housing 11, and a third oil seal 63 is provided at the contact between the motor shaft barrel 31 passing through the motor housing 11;
further, an oil filling hole communicated with the inner cavity is formed in the supporting shell 2;
further, the motor shaft cylinder 31 is rotatably mounted on the motor housing 11 through a bearing, and the differential housing 41 is rotatably mounted on the support housing 2 through a bearing;
when the differential driving system of the electric vehicle is used, the stator 13 is electrified to generate a rotating magnetic field to drive the rotor 12 to rotate, the rotor 12 is fixedly arranged on the motor shaft cylinder 31, and the motor shaft cylinder 31 is rotatably arranged, so that the first gear 33 at one end of the motor shaft cylinder 31 is connected with the differential device through the speed reduction assembly, and the differential driving system has the functions of speed reduction, torque increase and differential operation;
the method specifically comprises the following steps: the motor shaft cylinder 31 rotates along with the rotor 12, the first gear 33 drives the duplicate gear 32, the duplicate gear 32 is meshed with the second gear 43 on the differential shell 41 to realize power transmission, the differential component 4 is meshed with the sun gear 45 through the planetary gear 44 to form a differential structure, so that the first half shaft 51 and the second half shaft 52 connected with the pair of sun gears 45 rotate at different rotating speeds, the speed reduction and torque increase effects on the driving of the electric vehicle are realized, the differential driving of the electric vehicle is guaranteed, the support shell 2 is directly connected with the motor shell 11 to form an inner cavity, the motor component, the speed reduction component and the differential device are integrated together, the whole structure is more compact, the occupied space is small, and the condition that the occupied space is large due to the fact that the output end of a traditional motor is sleeved on a speed reducer and connected with the differential device is avoided;
one end of the shaft of the first half shaft 51 and one end of the shaft of the second half shaft 52 are correspondingly connected with the differential assembly 4, and the other end of the shaft of the first half shaft 51 and the other end of the shaft of the second half shaft 52 are correspondingly connected with a pair of wheels, so that differential running is guaranteed under the condition that driving is not influenced, and the whole body is stably supported.
Because the first oil seal 61 is arranged between the second half shaft 52 and the support shell 2, the second oil seal 62 is arranged between the first half shaft 51 and the motor shell 11, and the third oil seal 63 is arranged between the motor shaft cylinder 31 and the motor shell 11, the first oil seal 61, the second oil seal 62 and the third oil seal 63 can be used for sealing the motor shaft cylinder, so that dust is prevented from entering and influencing power driving;
this device will support the direct inner chamber that forms of shell 2 and motor casing 11 on the one hand, through motor drive and speed reduction, differential integration in an organic whole, not only realize coaxial output speed reduction, make the structure compacter, it causes occupation space big to avoid traditional motor output suit to lead to the fact eccentric output in the reduction gear, and guarantee differential drive, on the other hand first semi-axis 51 passes motor shaft section of thick bamboo 31, motor power output's motor shaft section of thick bamboo 31 and differential output driven first semi-axis 51, the axis of second semi-axis 52 is unanimous, avoid traditional drive and reduction gear, differential mechanism is connected and is caused the eccentric output's of power the condition, realize the high-speed stable rotation of motor.
Claims (7)
1. The differential driving system of the electric vehicle comprises a motor assembly, wherein the motor assembly comprises a motor shell (11) and a motor shaft barrel (31); the left end of the motor shell (11) is opened and is detachably arranged through a motor sealing cover (14), and the inner wall of the motor shell is provided with a stator (13);
the differential mechanism is characterized by also comprising a support assembly and a differential device;
the outer side of the right end of the motor shell (11) is provided with a supporting shell (2) and forms an inner cavity with the supporting shell; the left part of the motor shaft cylinder (31) is rotatably arranged in the motor shell (11) and is provided with a rotor (12), and the right part is positioned in the inner cavity and is connected with the input end of the differential device through a speed reduction assembly;
the support assembly comprises a second half shaft (52) and a first half shaft (51) with the middle part penetrating through the motor shaft barrel (31), one end of the first half shaft (51) and one end of the second half shaft (52) are correspondingly connected with the output end of the differential device, and the other end of the first half shaft (51) and the other end of the second half shaft are correspondingly connected with a pair of wheels.
2. The differential drive system of the electric vehicle as claimed in claim 1, characterized in that the right end of the electric motor shaft barrel (31) is provided with a first gear (33) connected with a speed reduction assembly, and the differential device comprises a differential housing (41) and a differential assembly (4) positioned in the differential housing (41); the differential shell (41) is rotatably arranged in the inner cavity, and a second gear (43) connected with the speed reducing assembly is arranged on the outer side of the inner cavity.
3. The differential drive system of the electric vehicle as claimed in claim 2, characterized in that the differential assembly (4) comprises a central shaft (46), a pair of planetary gears (44) and a pair of sun gears (45), the pair of planetary gears (44) are oppositely arranged on the differential shell (41) through the central shaft (46) and are in meshed connection with the pair of sun gears (45) which are oppositely arranged to form a differential structure;
the pair of sun gears (45) are correspondingly connected with the first half shaft (51) and the second half shaft (52).
4. The differential drive system of the electric vehicle as claimed in claim 2 or 3, characterized in that the speed reduction assembly comprises a duplicate gear (32), the duplicate gear (32) is rotatably arranged in the inner cavity and is respectively meshed with the first gear (33) and the second gear (43), and the number of teeth at one end of the duplicate gear (32) meshed with the first gear (33) is larger than that at one end of the duplicate gear (32) meshed with the second gear (43).
5. The differential drive system of an electric vehicle of claim 4, further comprising an oil seal assembly comprising a first oil seal (61), a second oil seal (62), and a third oil seal (63);
a first oil seal (61) is provided at a contact point where the second half shaft (52) passes through the support case (2), a second oil seal (62) is provided at a contact point where the first half shaft (51) passes through the motor housing (11), and a third oil seal (63) is provided at a contact point where the motor shaft cylinder (31) passes through the motor housing (11).
6. Differential drive system for electric vehicles according to claim 5, characterised in that the support shell (2) is provided with oil holes communicating with the internal cavity.
7. Differential drive system for electric vehicles according to claim 4, characterised in that the motor shaft (31) is mounted rotatably by bearings on the motor housing (11) and the differential housing (41) is mounted rotatably by bearings on the support housing (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120178036.4U CN214314928U (en) | 2021-01-22 | 2021-01-22 | Differential driving system of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120178036.4U CN214314928U (en) | 2021-01-22 | 2021-01-22 | Differential driving system of electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214314928U true CN214314928U (en) | 2021-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120178036.4U Active CN214314928U (en) | 2021-01-22 | 2021-01-22 | Differential driving system of electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214314928U (en) |
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2021
- 2021-01-22 CN CN202120178036.4U patent/CN214314928U/en active Active
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