CN209909086U - Two-gear variable-speed electric drive axle - Google Patents
Two-gear variable-speed electric drive axle Download PDFInfo
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- CN209909086U CN209909086U CN201920583345.2U CN201920583345U CN209909086U CN 209909086 U CN209909086 U CN 209909086U CN 201920583345 U CN201920583345 U CN 201920583345U CN 209909086 U CN209909086 U CN 209909086U
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- drive axle
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- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 239000000498 cooling water Substances 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 10
- 244000309464 bull Species 0.000 claims description 6
- 230000009194 climbing Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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Abstract
The utility model discloses a two-gear variable-speed electric drive axle, which relates to the technical field of electric drive axles, and comprises a middle shell, wherein a driving component, a transmission component and a differential component are arranged in the middle shell, the driving component comprises a motor shell, a driving motor with a motor hollow shaft is arranged in the motor shell, and a sun wheel is sleeved at the end part of the motor hollow shaft; the transmission assembly comprises a planet support, a plurality of duplicate gears are movably arranged in the planet support, and a primary speed reduction inner gear ring and a secondary speed reduction inner gear ring are arranged in the motor shell; the differential assembly comprises a differential support, and two differential gears and two half axle gears are arranged in the differential support. When the road gradient is large, the primary speed reduction inner gear ring and the duplicate gear are matched and work, the electric drive axle runs at high torque and low speed, and the climbing capacity of the automobile is improved; when the road gradient is small, the secondary speed reduction inner gear ring is matched with the duplicate gear and works, the electric drive axle runs at a low torque and a high speed, the high-speed running capacity of the automobile is enhanced, and the working efficiency of the electric drive axle is improved by adopting double-gear speed change.
Description
Technical Field
The utility model belongs to the technical field of electric drive axle's technique and specifically relates to a two keep off variable speed formula electric drive axle is related to.
Background
The electric automobile is a novel, energy-saving and environment-friendly vehicle, and particularly has huge development potential and wide application prospect in the current large environment with serious air pollution. Electric drive systems for electric vehicles are becoming more and more popular, and have great advantages compared with conventional drive systems, especially in terms of environmental protection.
The electric automobile replaces the traditional fuel engine of the automobile by using the electric motor, the electric motor can be started with load, and the use requirement of the automobile is met by reasonable configuration, which is greatly different from the traditional fuel engine.
At present, an electric vehicle is not suitable for using a multi-gear transmission, but if a speed change transmission device is omitted, requirements of vehicle climbing capacity, high-speed running and the like are difficult to meet, the single transmission ratio of a motor enables the working efficiency of the motor to be extremely low, particularly for small and medium-sized vehicles, and therefore a power system of the electric vehicle needs to be redesigned according to the working characteristics of the motor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a two keep off variable speed formula electric drive axle that low-speed gear and high-speed gear switch convenient, electric drive axle work efficiency is high.
The utility model discloses a can realize through following technical scheme:
a two-gear variable-speed electric transaxle comprising an intermediate housing, the intermediate housing having disposed therein:
the driving assembly comprises a motor shell fixedly arranged at one end in the middle shell, a driving motor with a motor hollow shaft is fixedly arranged in the motor shell, and a sun gear is sleeved at the end part of the motor hollow shaft;
the transmission assembly comprises a planet support rotatably arranged at the other end in the middle shell, a plurality of duplicate gears meshed with the sun gear are rotatably arranged in the planet support, and a primary speed reduction inner gear ring and a secondary speed reduction inner gear ring which can be respectively and independently meshed with the duplicate gears are arranged in the middle shell in an electric control adjusting mode; and
the differential assembly comprises a differential support fixedly arranged at the central position of the planet support, two differential gears are arranged in the differential support, and two half axle gears used for driving a left half axle and a right half axle to rotate are meshed with the two differential gears.
By adopting the technical scheme, the electric drive axle runs at high torque and low speed aiming at a heavy-gradient road, and the primary speed reduction inner gear ring is matched with the duplicate gear and works, so that the working speed ratio of the electric drive axle is improved, and the climbing capacity of the automobile is enhanced; aiming at a small slope and a horizontal road, the electric drive axle runs at a low torque and a high speed, and the secondary speed reduction inner gear ring is matched with the duplicate gear and works, so that the working speed ratio of the electric drive axle is reduced, and the high-speed running capacity of the automobile is enhanced. The utility model discloses a two keep off the variable speed and improved electric drive axle's work efficiency greatly, the mode that adopts two keep off the variable speed has increased the energy conversion efficiency of battery, and wherein, it is convenient to switch between low-speed fender and the high-speed fender, the utility model discloses the structure is firm, and power transmission efficiency is high, long service life.
Further setting the following steps: the duplex gear comprises a large gear and a small gear which are coaxially arranged, wherein the large gear is meshed with the sun gear, the primary speed reduction inner gear ring is arranged corresponding to the small gear, and the secondary speed reduction inner gear ring is arranged corresponding to the large gear;
during low-speed adjustment, the primary speed reduction inner gear ring is fixed and meshed with the pinion, and the secondary speed reduction inner gear ring rotates along with the bull gear;
during high-speed adjustment, the primary speed reduction inner gear ring rotates along with the pinion, and the secondary speed reduction inner gear ring is fixed and meshed with the bull gear.
By adopting the technical scheme, when the electric drive axle moves at low speed and high speed, the drive duplicate gear is uniformly and directly in a running state by the only sun gear in the electric drive axle, and the variable speed operation is simpler and more stable.
Further setting the following steps: the inner wall of the middle shell is provided with a first-stage electromagnetic actuator in control connection with the first-stage speed reduction inner gear ring and a second-stage electromagnetic actuator in control connection with the second-stage speed reduction inner gear ring, and the end part of the middle shell is provided with an electromagnetic clutch.
By adopting the technical scheme, during low-speed adjustment, the electromagnetic clutch controls the first-stage electromagnetic actuator to work, so that the first-stage speed reduction inner gear ring is fixed, and the second-stage speed reduction inner gear ring rotates along with the large gear; when the high-speed adjustment is carried out, the electromagnetic clutch controls the work of the secondary electromagnetic actuator to enable the secondary speed reduction inner gear ring to be fixed, and the primary speed reduction inner gear ring rotates along with the pinion.
Further setting the following steps: a straight shaft penetrates through the middle of the planet support, and the two differential gears are respectively sleeved at two ends of the straight shaft.
Through adopting above-mentioned technical scheme, the straight axle is directly interlude fixed on the planet carrier, and effective fixed differential gear ensures the stability of two differential gear operation, and the assembly process of straight axle is simple convenient simultaneously.
Further setting the following steps: the driving motor further comprises a motor rotor and a motor stator, and the motor rotor is fixedly connected with the motor hollow shaft.
Through adopting above-mentioned technical scheme, driving motor's motor stator is fixed at the motor casing inner wall, and electric motor rotor drives the rotation of motor hollow shaft.
Further setting the following steps: an inner cavity partition board used for separating the motor shell and the planet carrier is fixedly arranged in the middle shell, and the planet carrier is rotatably arranged on the side wall of the inner cavity partition board.
Through adopting above-mentioned technical scheme, the inner chamber baffle separates motor casing and planet support, reduces mutual interference, and the inner chamber baffle plays the supporting role to planet support simultaneously.
Further setting the following steps: the middle shell is close to one end of the motor shell can be detachably provided with a right end cover, the other end of the middle shell can be detachably provided with a left end cover, and the differential support is arranged at the center of the left end cover of the motor in a rotating mode.
Through adopting above-mentioned technical scheme, there are right-hand member lid and left end lid at the both ends of middle casing through bolt fixed mounting respectively, play the guard action, and the left end lid still can play the supporting role to the differential support simultaneously.
Further setting the following steps: and a magnetic resistance type rotary transformer is arranged in the right end cover.
By adopting the technical scheme, the reluctance type rotary transformer can detect the rotation stability of the hollow shaft of the motor.
Further setting the following steps: the outer wall of the motor shell is provided with a spiral cooling water channel.
By adopting the technical scheme, the cooling water is introduced into the cooling water channel, so that the temperature of the electric drive axle during working can be reduced, and the running safety of the electric drive axle is improved.
To sum up, the utility model discloses a beneficial technological effect does:
(1) when the electric drive axle runs at a low speed, the first-stage speed reduction inner gear ring is fixed, the double gears drive the planet support to rotate in the first-stage speed reduction inner gear ring, and the second-stage speed reduction inner gear ring rotates along with the large gear, so that the working speed ratio of the electric drive axle is improved, and the climbing capacity of an automobile is enhanced when the electric drive axle is used on a road with a large gradient;
(2) when the electric drive axle runs at a high speed, the secondary speed reduction inner gear ring is fixed, the dual gears drive the planet support to rotate in the secondary speed reduction inner gear ring, the primary speed reduction inner gear ring rotates along with the pinion, the working speed ratio of the electric drive axle is reduced, and the high-speed running capacity of an automobile is enhanced when the automobile runs on a small-gradient road;
(3) the mode through adopting two grades of variable speeds has improved electric drive axle's work efficiency, and low-speed gear and high-speed gear switch convenient, have increased the energy conversion efficiency of battery, adopt efficient power transmission mode, have also improved electric drive axle's life.
Drawings
Fig. 1 is a sectional view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the transmission of the present invention;
FIG. 3 is a schematic view of the low speed drive path of the present invention;
fig. 4 is a schematic diagram of the high speed transmission path of the present invention.
Reference numerals: 1. a middle housing; 2. an inner cavity partition plate; 3. a right end cap; 4. a left end cap; 5. magnetic resistance type rotary transformer; 6. a cooling water channel; 10. a motor housing; 11. a drive motor; 111. a motor hollow shaft; 112. a motor rotor; 113. a motor stator; 12. a sun gear; 20. a planet carrier; 21. a duplicate gear; 211. a bull gear; 212. a pinion gear; 22. a primary speed reduction annular gear; 23. a primary electromagnetic actuator; 24. a secondary speed reduction annular gear; 25. a secondary electromagnetic actuator; 26. an electromagnetic clutch; 30. a differential carrier; 31. a differential gear; 32. a half shaft gear; 33. a straight axis.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, for the utility model discloses a two keep off variable speed formula electric drive axle, including middle casing 1, middle casing 1 is the tube-shape setting, is provided with the drive assembly who is used for providing electric drive axle drive power in the middle casing 1 for with the car about the differential subassembly that semi-axis power is connected with be used for realizing the transmission's between drive assembly and the differential subassembly transmission assembly.
The one end of middle casing 1 can be dismantled and be provided with right-hand member lid 3, and the other end can be dismantled and be provided with left end lid 4, and right-hand member lid 3 and left end lid 4 all pass through the bolt fastening at the tip of middle casing 1. An inner cavity clapboard 2 is fixed at the central position inside the middle shell 1, and the inner cavity clapboard 2 is arranged annularly. The middle housing 1 is divided into a left chamber and a right chamber by an inner chamber partition 2.
The drive assembly comprises a motor shell 10 fixedly arranged in the middle shell 1, the motor shell 10 is positioned at one end, close to the right end cover 3, of the middle shell 1, the motor shell 10 is in a cylindrical shape and is coaxially arranged with the middle shell 1, the outer wall of the motor shell 10 is provided with a spiral cooling water channel 6, and the end face of the middle shell 1 is provided with a water inlet and a water outlet which are respectively communicated with the two ends of the cooling water channel 6. And cooling water is introduced into the cooling water channel 6, and the temperature of the electric drive axle during working is reduced through continuous cooling water.
The driving motor 11 is fixedly arranged in the motor casing 10, the driving motor 11 comprises a motor rotor 112, a motor stator 113 and a motor hollow shaft 111, the motor stator 113 of the driving motor 11 is fixed on the inner wall of the motor casing 10, the motor rotor 112 is arranged in the motor stator 113 and is in magnetic contact with the motor stator 113, the motor hollow shaft 111 is fixed on the inner side of the motor rotor 112, and the motor hollow shaft 111 and the middle casing 1 are coaxially arranged. After the driving motor 11 is started, the motor rotor 112 drives the motor hollow shaft 111 to rotate, so as to provide driving force for the electric drive axle. The right half shaft of the vehicle can extend into the hollow motor shaft 111. The end of the hollow motor shaft 111 pointing to the middle housing 1 is sleeved with a sun gear 12, and the sun gear 12 is located at the center of the middle housing 1. A plurality of reluctance type rotary transformers 5 are fixed at the center position of the right end cover 3, and the plurality of reluctance type rotary transformers 5 are wound on the peripheral side of the motor hollow shaft 111. The stability of the rotation of the hollow shaft 111 of the motor can be detected by the reluctance type rotary transformer 5.
The transmission assembly comprises a planet carrier 20 rotatably arranged in the middle shell 1, the planet carrier 20 and the motor shell 10 are positioned on two sides of the inner cavity partition plate 2, the planet carrier 20 is rotatably arranged on the inner cavity partition plate 2 through a bearing, a plurality of duplicate gears 21 meshed with the sun gear 12 are movably arranged in the planet carrier 20, and the duplicate gears 21 are preferably three groups and circumferentially arrayed respectively by taking the motor hollow shaft 111 as an axis. The duplicate gear 21 comprises a large gear 211 and a small gear 212 which are coaxially and fixedly arranged, the diameter of the large gear 211 is larger than that of the small gear 212, the large gear 211 is positioned on one side close to the inner cavity partition plate 2 and is meshed with the sun gear 12, and the small gear 212 is positioned on one side close to the left end cover 4.
The inner wall of the middle shell 1 is provided with a primary speed reduction ring gear 22 and a secondary speed reduction ring gear 24 which can be respectively and independently meshed with the duplicate gear 21 in an electric control manner, the primary speed reduction ring gear 22 is arranged corresponding to the small gear 212, and the secondary speed reduction ring gear 24 is arranged corresponding to the large gear 211. The primary reduction ring gear 22 and the secondary reduction ring gear 24 are rotatable or fixed inside the intermediate case 1. A primary electromagnetic actuator 23 which is in control connection with the primary speed reduction ring gear 22 and a secondary speed reduction ring gear are fixed on the inner wall of the middle shell 1The inner gear ring 24 controls a connected secondary electromagnetic actuator 25, and an electromagnetic clutch 26 is fixed on one side of the left end cover 4 facing the inner cavity partition plate 2. Referring to fig. 2, during low-speed adjustment, the electromagnetic clutch 26 controls the first-stage electromagnetic actuator 23 to work, so that the first-stage reduction ring gear 22 is fixed and meshed with the pinion 212, the second-stage reduction ring gear 24 rotates along with the bull gear 211, and the working speed ratio is high speed ratio i1(ii) a During high-speed adjustment, the electromagnetic clutch 26 controls the work of the secondary electromagnetic actuator 25, so that the secondary speed reduction ring gear 24 is fixed and meshed with the large gear 211, the primary speed reduction ring gear 22 rotates along with the small gear 212, and the working speed ratio is low speed ratio i at the moment2，i1Greater than i2. When the electric drive axle moves at low speed and high speed, the only sun gear 12 in the electric drive axle drives the duplicate gear 21 to be in a running state, and the internal transmission structure of the electric drive axle is simple, so that the variable speed operation of the electric drive axle is more stable.
The differential assembly comprises a differential support 30 fixedly arranged at the central position of the planet support 20, the differential support 30 is rotatably arranged at the central position of the left end cover 4 through a bearing, two differential gears 31 are rotatably arranged in the differential support 30, the two differential gears 31 are oppositely arranged, a straight shaft 33 is fixed at the middle position of the planet support 20, the two differential gears 31 are respectively sleeved at two ends of the straight shaft 33, two half-axle gears 32 are further rotatably arranged in the differential support 30, the two differential gears 31 are respectively meshed with the two half-axle gears 32, and the axis of the differential gear 31 is orthogonal to the axis of the half-axle gear 32. Thereby fix differential gear 31 on planet carrier 20 through the direct interlude of straight axle 33, ensure the stability of two differential gear 31 operations, right semi-axis and left semi-axis of car pass left end lid 4 and right end lid 3 respectively and stretch into to middle casing 1 inside, right semi-axis and left semi-axis are fixed with two side gear 32.
The implementation principle and the beneficial effects of the embodiment are as follows:
referring to fig. 3, when the electric drive axle is in a low-speed high-torque mode on a heavy-gradient road, the drive motor 11 drives the motor hollow shaft 111 to rotate and then drives the dual gear 21 to rotate, and at the moment, the electromagnetic clutch 26 controls the first-stage electromagnetic actuator 23 to work, so that the first-stage reduction ring gear 22 is fixed and is connected with the small reduction ring gear 22The gear 212 is engaged, the second-stage reduction ring gear 24 rotates along with the large gear 211, the planet carrier 20 drives the differential carrier 30 to rotate in the rotating process, and then the differential gear 31 drives the half axle gear 32 to rotate, and the working speed ratio is the high speed ratio i1。
Referring to fig. 4, when the electric drive axle is on a low-gradient or horizontal road, the drive motor 11 drives the motor hollow shaft 111 to rotate and then drives the dual gear 21 to rotate, at this time, the electromagnetic clutch 26 controls the second-stage electromagnetic actuator 25 to work, so that the second-stage reduction ring gear 24 is fixed and meshed with the large gear 211, the first-stage reduction ring gear 22 rotates along with the small gear 212, the planetary support 20 drives the differential support 30 to rotate during rotation, and further drives the half-axle gear 32 to rotate through the differential gear 31, and at this time, the working speed ratio is the low speed ratio i2。
The utility model discloses an adopt the mode of keeping off two kinds of differences of low-speed gear and high-speed gear to adjust different road conditions, two keep off the variable speed and improved the work efficiency of electric drive axle greatly, increased the energy conversion ability of battery, it is convenient simultaneously to keep off and switch with the high-speed gear, and is easy and simple to handle, and the electric drive axle structure is firm simultaneously, and power transmission efficiency is high, and life is longer.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (9)
1. The utility model provides a two keep off variable speed formula electric transaxle which characterized in that, includes middle casing (1), be provided with in middle casing (1):
the driving assembly comprises a motor shell (10) fixedly arranged at one end in the middle shell (1), a driving motor (11) with a motor hollow shaft (111) is fixedly arranged in the motor shell (10), and a sun wheel (12) is sleeved at the end part of the motor hollow shaft (111);
the transmission assembly comprises a planet support (20) rotatably arranged at the other end in the middle shell (1), a plurality of duplicate gears (21) meshed with the sun gear (12) are rotatably arranged in the planet support (20), and a primary speed reduction inner gear ring (22) and a secondary speed reduction inner gear ring (24) which can be respectively and independently meshed with the duplicate gears (21) are arranged in the middle shell (1) in an electric control adjusting mode; and
the differential assembly comprises a differential support (30) fixedly arranged at the central position of the planet support (20), two differential gears (31) are arranged in the differential support (30), and two side gears (32) used for respectively driving a left half shaft and a right half shaft to rotate are meshed with the two differential gears (31).
2. The two-speed variable-speed electric drive axle according to claim 1, wherein the duplicate gear (21) comprises a gearwheel (211) and a pinion (212) that are coaxially arranged, wherein the gearwheel (211) meshes with the sun gear (12), the primary reduction ring gear (22) is arranged in correspondence with the pinion (212), and the secondary reduction ring gear (24) is arranged in correspondence with the gearwheel (211);
during low-speed adjustment, the primary speed reduction ring gear (22) is fixed and meshed with the pinion (212), and the secondary speed reduction ring gear (24) rotates along with the bull gear (211);
during high-speed adjustment, the primary speed reduction ring gear (22) rotates along with the pinion (212), and the secondary speed reduction ring gear (24) is fixed and meshed with the bull gear (211).
3. The two-speed variable-speed electric drive axle according to claim 2, wherein a primary electromagnetic actuator (23) in control connection with the primary speed reduction ring gear (22) and a secondary electromagnetic actuator (25) in control connection with the secondary speed reduction ring gear (24) are provided on the inner wall of the intermediate housing (1), and an electromagnetic clutch (26) is provided at an end portion of the intermediate housing (1).
4. The two-speed variable-speed electric drive axle is characterized in that a straight shaft (33) penetrates through the middle position of the planet carrier (20), and two differential gears (31) are sleeved at two ends of the straight shaft (33) respectively.
5. The two-speed, variable-speed electric drive axle according to claim 1, characterized in that the drive motor (11) further comprises a motor rotor (112) and a motor stator (113), the motor rotor (112) being fixedly connected to the motor hollow shaft (111).
6. The two-speed variable-speed electric drive axle according to claim 1, wherein an inner cavity partition plate (2) for separating the motor casing (10) and the planet carrier (20) is fixedly arranged in the middle housing (1), and the planet carrier (20) is rotatably arranged on the side wall of the inner cavity partition plate (2).
7. The two-speed, variable-speed electric drive axle according to claim 6, characterized in that the intermediate housing (1) is detachably provided with a right end cover (3) at one end close to the motor casing (10) and a left end cover (4) at the other end, and the differential carrier (30) is rotatably disposed at the center of the left end cover (4).
8. Two-speed, variable-speed electric drive axle according to claim 7, characterized in that a reluctance-type rotary transformer (5) is arranged in the right end cap (3).
9. The two-speed variable-speed electric drive axle according to claim 1, wherein a spiral cooling water channel (6) is formed in an outer wall of the motor housing (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920583345.2U CN209909086U (en) | 2019-04-25 | 2019-04-25 | Two-gear variable-speed electric drive axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920583345.2U CN209909086U (en) | 2019-04-25 | 2019-04-25 | Two-gear variable-speed electric drive axle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209909086U true CN209909086U (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920583345.2U Expired - Fee Related CN209909086U (en) | 2019-04-25 | 2019-04-25 | Two-gear variable-speed electric drive axle |
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| Country | Link |
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| CN (1) | CN209909086U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005764A (en) * | 2019-04-25 | 2019-07-12 | 湖北星星电驱动有限公司 | A kind of two grades of speed changing type electric drive axles |
| WO2021073184A1 (en) * | 2019-10-14 | 2021-04-22 | 舍弗勒技术股份两合公司 | Two-gear variable-speed bridge driving system without driving force interruption |
-
2019
- 2019-04-25 CN CN201920583345.2U patent/CN209909086U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005764A (en) * | 2019-04-25 | 2019-07-12 | 湖北星星电驱动有限公司 | A kind of two grades of speed changing type electric drive axles |
| WO2021073184A1 (en) * | 2019-10-14 | 2021-04-22 | 舍弗勒技术股份两合公司 | Two-gear variable-speed bridge driving system without driving force interruption |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200107 |