CN115750701A - Single-motor driven transmission structure with two forward gears - Google Patents
Single-motor driven transmission structure with two forward gears Download PDFInfo
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- CN115750701A CN115750701A CN202211559340.9A CN202211559340A CN115750701A CN 115750701 A CN115750701 A CN 115750701A CN 202211559340 A CN202211559340 A CN 202211559340A CN 115750701 A CN115750701 A CN 115750701A
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Abstract
The utility model provides a single motor drive's transmission structure that has two forward gears is provided, by the following parts: a torque input unit; a shift unit comprising: the first intermediate shaft is fixedly connected with first output engagement teeth; the second intermediate shaft is sleeved outside the first intermediate shaft in a relatively rotating manner and is fixedly connected with second output joint teeth; the third intermediate shaft is sleeved outside the second intermediate shaft in a relatively rotating manner, the first end of the third intermediate shaft is fixedly connected to the double-star planet row, and the second end of the third intermediate shaft is fixedly connected to the box body; the short shaft is sleeved outside the third intermediate shaft in a relatively rotatable manner, one end of the short shaft is fixedly connected with a torque input gear, the other end of the short shaft is fixedly connected to the planet carrier, and the torque input gear is used for receiving the torque of the torque input unit; an engagement sleeve for selectively transmitting torque from the first output engagement tooth or the second output engagement tooth to the torque output unit; and a torque output unit. The bearing capacity can be effectively improved, and the overall structure is more compact.
Description
Technical Field
The invention relates to the field of new energy automobile parts, in particular to a single-motor-driven transmission structure with two forward gears.
Background
New energy automobiles are increasingly receiving attention from the nation and the automobile industry. However, the existing electric drive bridge has the problems of complex transmission structure, low transmission efficiency, high cost and the like, and cannot meet the diversified requirements of different road conditions on the performance of the whole vehicle.
Therefore, there is a need to develop a single motor driven transmission structure with two forward gears to solve one or more of the above technical problems.
Disclosure of Invention
To solve at least one of the above technical problems, according to an aspect of the present invention, there is provided a single motor driven transmission structure having two forward gears, comprising:
a torque input unit for inputting a torque of the single motor to the shift unit;
a shift unit comprising: the first intermediate shaft is fixedly connected with first output joint teeth; the second intermediate shaft is sleeved outside the first intermediate shaft in a relatively rotatable manner and is fixedly connected with second output joint teeth; the first end of the second intermediate shaft is fixedly connected with a double-star planet row, the second end of the second intermediate shaft is fixedly connected with the box body, the double-star planet row comprises a sun wheel, an inner planet wheel, an outer planet wheel, a planet carrier and a gear ring, the sun wheel is fixedly connected with the third intermediate shaft, the planet carrier is fixedly connected with the second intermediate shaft, and the gear ring is fixedly connected with the first intermediate shaft; the short shaft is sleeved outside the third intermediate shaft in a relatively rotating manner, one end of the short shaft is fixedly connected with a torque input gear, the other end of the short shaft is fixedly connected to the planet carrier, and the torque input gear is used for receiving the torque of the torque input unit; an engagement sleeve for selectively transmitting torque from the first output engagement tooth or the second output engagement tooth to the torque output unit; and
and a torque output unit including a differential for receiving the torque of the first output engagement tooth or the second output engagement tooth and outputting the torque to the first output axle shaft and the second output axle shaft.
According to yet another aspect of the present invention, the first intermediate shaft is a hollow shaft and the first output half shaft passes through the first intermediate shaft.
According to a further aspect of the invention, the stub shaft is connected to the planet carrier of a first side of the double star planet row and the second countershaft is connected to the planet carrier of a second side of the double star planet row.
According to yet another aspect of the present invention, the double star planetary row is disposed on a first side of the torque input gear and the second end of the third countershaft, the second output engagement tooth and the first output engagement tooth are disposed on a second side of the torque input gear.
According to yet another aspect of the invention, the engagement sleeve is disposed between the first and second output engagement teeth.
According to yet another aspect of the present invention, the torque output unit further comprises a reduction planetary row, and the torque from the first output engagement tooth or the second output engagement tooth is transmitted to the differential via the reduction planetary row.
According to still another aspect of the present invention, the torque input unit includes a single motor and a first transmission gear that transmits torque of the single motor to the torque input gear.
According to still another aspect of the present invention, the torque input unit further includes a torque transfer unit disposed between the first transfer gear and the torque input gear.
The invention can obtain one or more of the following technical effects:
1. the single motor is matched with the double-star planet row to realize a two-gear mechanism by speed reduction transmission, so that the utilization rate of the motor power is improved;
2. adopt two star planet row to slow down, the gear step ratio reduces, and the impact of shifting reduces, and it is more level and smooth to shift, has improved the driving and has controlled the travelling comfort.
3. The double-star planetary reduction transmission is adopted, so that the bearing capacity can be effectively improved, and the overall structure is more compact;
4. the combined gear sleeve mode is adopted, so that power passes through the double-star planetary reduction mechanism at the first gear, and directly passes through the double-star planetary reduction mechanism at the second gear to be directly connected to the next-stage reduction mechanism, and the transmission efficiency of the second gear is improved.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic diagram of a single motor driven two forward speed transmission configuration in accordance with a preferred embodiment of the present invention.
Fig. 2-3 are schematic torque transmission routes for two forward gears of a single motor driven two forward gear transmission according to a preferred embodiment of the present invention.
Fig. 4 is a schematic view of a single motor driven two forward speed drive configuration in accordance with another preferred embodiment of the present invention.
Detailed Description
The best mode for carrying out the invention will now be described in detail by way of preferred embodiments with reference to the accompanying drawings, wherein the detailed description is intended to illustrate the invention in detail without limiting the invention thereto, and various changes and modifications can be made without departing from the spirit and scope of the invention as defined by the appended claims.
Example 1
According to a preferred embodiment of the present invention, referring to fig. 1, there is provided a single motor driven transmission structure having two forward gears, characterized by comprising:
a torque input unit for inputting the torque of the single motor M1 to the shift unit;
a shift unit comprising: a first intermediate shaft 30 to which the first output engagement teeth 15 are fixedly connected; the second intermediate shaft 31 is sleeved outside the first intermediate shaft 30 in a relatively rotatable manner and is fixedly connected with the second output engagement teeth 14; the third intermediate shaft 32 is sleeved outside the second intermediate shaft 31 in a relatively rotatable manner, a first end of the third intermediate shaft is fixedly connected to the double-star planet row, a second end of the third intermediate shaft is fixedly connected to the box body 20, the double-star planet row comprises a sun gear 10, an inner planet gear 11, an outer planet gear 12, a planet carrier 9 and a gear ring 13, the sun gear 10 is fixedly connected to the third intermediate shaft 32, the planet carrier 9 is fixedly connected to the second intermediate shaft 31, and the gear ring 13 is fixedly connected to the first intermediate shaft 30; the short shaft 2 is sleeved outside the third intermediate shaft 32 in a relatively rotatable manner, one end of the short shaft is fixedly connected with a torque input gear 8, the other end of the short shaft is fixedly connected to the planet carrier 9, and the torque input gear 8 is used for receiving the torque of the torque input unit; an engaging sleeve 16 for selectively transmitting torque from the first output engaging tooth 15 or the second output engaging tooth 14 to the torque output unit; and
a torque output unit, including a differential 27, for receiving the torque of the first output engagement teeth 15 or the second output engagement teeth 14 and outputting the torque to first and second output half shafts 29, 28.
In accordance with a further preferred embodiment of the present invention, the first intermediate shaft 30 is a hollow shaft through which the first output half shaft passes.
According to a further preferred embodiment of the invention, the stub shaft 2 is connected to the planet carrier on the first side of the double star planet row and the second countershaft 31 is connected to the planet carrier on the second side of the double star planet row.
According to a further preferred embodiment of the present invention, said double star planetary row is arranged on a first side of the torque input gear 8 and the second end of the third intermediate shaft 32, the second output engagement teeth 14 and the first output engagement teeth 15 are arranged on a second side of the torque input gear 8.
According to a further preferred embodiment of the invention, said engagement sleeve 16 is arranged between the first and second output engagement teeth.
According to a further preferred embodiment of the invention, see fig. 1, the torque output unit further comprises a reduction planetary row, via which the torque from the first or second output engagement teeth is transferred back to the differential 27. The reduction planetary row comprises a sun wheel 22, planet wheels 23, a planet carrier 24 and a ring gear 25.
According to still another preferred embodiment of the present invention, referring to fig. 4, the torque input unit includes a single motor and a first transmission gear that transmits the torque of the single motor to the torque input gear.
According to a further preferred embodiment of the present invention, referring to fig. 1 and 4, the torque input unit further comprises a torque transfer unit disposed between the first transmission gear 4 and the torque input gear 8.
According to another preferred embodiment of the present invention, there is provided a single motor driven transmission structure having two forward gears, characterized in that: the motor M1 is connected with a gear 4 through a motor shaft 3, the gear 4 is meshed with the gear 5, the gear 5 is rigidly connected with an intermediate shaft 6 and a gear 7, the gear 7 is meshed with a gear 8, the gear 8 is rigidly connected with a planet carrier 9, an inner planet wheel 11 and an outer planet wheel 12 both revolve around the central axis of the planet carrier 9 and rotate around the axis of the gear under the constraint of the planet carrier 9, a sun gear 10 is fixed with a shell 20, the inner planet wheel 11 is meshed with the outer planet wheel 12, the outer planet wheel 12 is meshed with an inner gear ring 13, the inner gear ring 13 is rigidly connected with an output engaging gear 15, an engaging gear sleeve 16 is connected with a shifting fork 17, the shifting fork 17 is fixed on a shifting transmission rod 18, the shifting fork 17 and a spline sleeve 21 are radially fixed and axially keep relative sliding, and the shifting motor 19 drives the shifting transmission rod 18 to slide left and right for shifting; the output joint teeth 14 and the output joint teeth 15 are distributed on two sides of the joint gear sleeve 16 and respectively used as a first position and a second position of a shifting gear, the spline sleeve 21 is coaxially and rigidly connected with the sun gear 22, the sun gear 22 is meshed with the planet gears 23, the planet gears 23 are meshed with the inner gear ring 25, the inner gear ring 25 is fixed with the shell 20, the planet gears 23 revolve around the central axis of the planet carrier 24 and rotate around the self axis of the planet gear shaft under the constraint of the planet carrier 24, the planet carrier 24 is coaxially and rigidly connected with the differential shell 26, the differential shell 26 drives the differential 27, and the differential 27 transmits power to the first half shaft 28 and the second half shaft 29 and then to the wheel edge.
The working principle of the invention is as follows.
First gear (low gear): referring to fig. 2, the output torque of the motor M1 is transmitted to the gear 4 through the motor shaft 3, the gear 4 is respectively engaged with the gear 5, the gear 5 is rigidly connected with the gear 7, the gear 7 transmits power to the gear 8 through the gear engagement connection, the gear 8 is rigidly connected with the planet carrier 9, the gear shifting motor 19 drives the gear shifting transmission rod 18, the gear shifting transmission rod 18 drives the shifting fork 17 and the engaging gear sleeve 16 to axially slide along the spline sleeve 21, the engaging gear sleeve 16 is engaged with the output engaging gear 15 to reach a first gear position, the inner gear ring 13 is rigidly connected with the output engaging gear 15, the sun gear 10 is fixed, the planet carrier 9 drives the inner planet gear 11 and the outer planet gear 12 to rotate around the central axis, the inner planet gear 11 is engaged with the sun gear 10, the outer planetary gear 12 is meshed with the inner planetary gear 11, the inner gear ring 13 is meshed with the outer planetary gear 12, at the moment, a double-planetary-row structure consisting of the planet carrier 9, the inner planetary gear 11, the outer planetary gear 12 and the inner gear ring 13 is in a speed reduction transmission state, the inner gear ring 13 is rigidly connected with the spline housing 21 and the sun gear 22, the sun gear 22 is meshed with the planet gear 23, the planet gear 23 is meshed with the inner gear ring 25, the inner gear ring 25 is fixed, the planet gear 23 drives the planet carrier 24 to rotate around a central axis, the planet carrier 24 is rigidly connected with the differential case 26, power is respectively transmitted to the first output half shaft 28 and the second output half shaft 29 through the differential 27, and finally the power is output to the wheel edge.
Second gear (high gear): referring to fig. 3, the output torque of the motor M1 is transmitted to the gear 4 through the motor shaft 3, the gear 4 is respectively engaged with the gear 5, the gear 5 is rigidly connected with the gear 7, the gear 7 transmits power to the gear 8 through the gear engagement connection, the gear 8 is rigidly connected with the planet carrier 9 and the output engaging tooth 14, the gear-shifting motor 19 drives the gear-shifting transmission rod 18, the gear-shifting driving rod 18 drives the shifting fork 17 and the engaging tooth sleeve 16 to axially slide along the spline sleeve 21, the engaging tooth sleeve 16 is engaged with the output engaging tooth 14 to reach the second gear position, the sun gear 10 is fixed, the planet carrier 9 drives the inner planet gear 11 and the outer planet gear 12 to rotate around the central axis, and at the moment, the double-planet-row structure formed by the planet carrier 9, the inner planet gear 11 and the outer planet gear 12 is in a direct transmission state. The planet carrier 9 is rigidly connected with the spline housing 21 and the sun gear 22, the sun gear 22 is meshed with the planet gear 23, the planet gear 23 is meshed with the annular gear 25, the annular gear 25 is fixed, the planet gear 23 drives the planet carrier 24 to rotate around a central axis, the planet carrier 24 is rigidly connected with the differential case 26, power is respectively transmitted to the first output half shaft 28 and the second output half shaft 29 through the differential 27, and finally the power is output to the wheel edge.
The invention can obtain one or more of the following technical effects:
1. the single motor is matched with the double-star planet row for speed reduction transmission to realize a two-gear mechanism, so that the utilization rate of the motor power is improved;
2. adopt two star planet row to slow down, the gear step ratio reduces, and the impact of shifting reduces, and it is more level and smooth to shift, has improved the driving and has controlled the travelling comfort.
3. The double-star planetary reduction transmission is adopted, so that the bearing capacity can be effectively improved, and the overall structure is more compact;
4. the combined gear sleeve mode is adopted, so that power passes through the double-star planetary reduction mechanism at the first gear and directly enters the next-stage reduction mechanism at the second gear across the double-star planetary reduction mechanism, and the transmission efficiency of the second gear is improved.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A single motor driven transmission structure with two forward gears is characterized by comprising the following components:
a torque input unit for inputting a torque of the single motor to the shift unit;
a shift unit comprising: the first intermediate shaft is fixedly connected with first output engagement teeth; the second intermediate shaft is sleeved outside the first intermediate shaft in a relatively rotating manner and is fixedly connected with second output joint teeth; the first end of the first intermediate shaft is fixedly connected with a double-star planet row, the second end of the first intermediate shaft is fixedly connected to the box body, the double-star planet row comprises a sun wheel, an inner planet wheel, an outer planet wheel, a planet carrier and a gear ring, the sun wheel is fixedly connected to the first intermediate shaft, the planet carrier is fixedly connected to the second intermediate shaft, and the gear ring is fixedly connected to the first intermediate shaft; the short shaft is sleeved outside the third intermediate shaft in a relatively rotating manner, one end of the short shaft is fixedly connected with a torque input gear, the other end of the short shaft is fixedly connected to the planet carrier, and the torque input gear is used for receiving the torque of the torque input unit; an engagement sleeve for selectively transmitting torque from the first output engagement tooth or the second output engagement tooth to the torque output unit; and
and a torque output unit including a differential for receiving the torque of the first output engagement tooth or the second output engagement tooth and outputting the torque to the first output half shaft and the second output half shaft.
2. The single motor driven two forward speed drive of claim 1 wherein said first intermediate shaft is a hollow shaft through which the first output half shaft passes.
3. The single motor driven two forward speed drive configuration of claim 2 wherein the stub shaft is connected to the planet carrier on a first side of the double star planetary row and the second countershaft is connected to the planet carrier on a second side of the double star planetary row.
4. A single motor driven two forward speed transmission according to any one of claims 1 to 3 wherein the double star planetary row is disposed on a first side of the torque input gear and the second end of the third countershaft, the second output engagement tooth and the first output engagement tooth are disposed on a second side of the torque input gear.
5. The single motor driven two forward speed drive of claim 4 wherein the engagement sleeve is disposed between the first and second output engagement teeth.
6. The single motor driven two forward speed drive configuration of claim 5, wherein the torque output unit further includes a reduction planetary row, torque from the first or second output engagement teeth being transmitted back to the differential via the reduction planetary row.
7. The single motor driven transmission structure having two forward speeds according to claim 6, wherein the torque input unit includes a single motor and a first transmission gear that transmits the torque of the single motor to the torque input gear.
8. The single motor driven transmission structure having two forward speeds of claim 7, wherein the torque input unit further comprises a torque transmission unit disposed between the first transmission gear and the torque input gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211559340.9A CN115750701A (en) | 2022-12-06 | 2022-12-06 | Single-motor driven transmission structure with two forward gears |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211559340.9A CN115750701A (en) | 2022-12-06 | 2022-12-06 | Single-motor driven transmission structure with two forward gears |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115750701A true CN115750701A (en) | 2023-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211559340.9A Pending CN115750701A (en) | 2022-12-06 | 2022-12-06 | Single-motor driven transmission structure with two forward gears |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115750701A (en) |
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2022
- 2022-12-06 CN CN202211559340.9A patent/CN115750701A/en active Pending
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