CN112519497A - Split type double-motor coaxial wheel-side planet wheel speed reduction drive axle - Google Patents

Split type double-motor coaxial wheel-side planet wheel speed reduction drive axle Download PDF

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Publication number
CN112519497A
CN112519497A CN201910877259.7A CN201910877259A CN112519497A CN 112519497 A CN112519497 A CN 112519497A CN 201910877259 A CN201910877259 A CN 201910877259A CN 112519497 A CN112519497 A CN 112519497A
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CN
China
Prior art keywords
wheel
motor
assembly
planetary gear
reducing mechanism
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910877259.7A
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Chinese (zh)
Inventor
石雅清
万林园
刘传超
邓勇
王冬伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongfeng Dana Axle Co Ltd
Original Assignee
Dongfeng Dana Axle Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dongfeng Dana Axle Co Ltd filed Critical Dongfeng Dana Axle Co Ltd
Priority to CN201910877259.7A priority Critical patent/CN112519497A/en
Publication of CN112519497A publication Critical patent/CN112519497A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/12—Torque-transmitting axles
    • B60B35/121—Power-transmission from drive shaft to hub
    • B60B35/122—Power-transmission from drive shaft to hub using gearings
    • B60B35/125—Power-transmission from drive shaft to hub using gearings of the planetary type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
    • B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

The invention discloses a split double-motor coaxial wheel-side planet wheel speed reduction drive axle. Belongs to the technical field of new energy automobile chassis. The novel electric vehicle mainly solves the problems that an externally-mounted structure on the electric vehicle in the existing market has large transmission efficiency loss, short driving range of the vehicle, large self weight of an assembly, and limited space arrangement and vehicle load. It is mainly characterized in that: the system comprises a first motor, a second motor, a first-stage planetary gear speed reducing mechanism, a second-stage planetary gear speed reducing mechanism, a first wheel-side speed reducer assembly, a second wheel-side speed reducer assembly, a first wheel assembly, a second wheel assembly, an independent suspension assembly and an axle housing; the first motor, the second motor, the first stage planetary gear speed reducing mechanism and the second stage planetary gear speed reducing mechanism are respectively arranged on two sides of the middle part of the axle housing and are coaxially arranged with the first wheel-side speed reducer and the second wheel-side speed reducer. The invention has the characteristics of relatively small occupied chassis structure arrangement space, no influence on the arrangement quantity of batteries, wide efficient working area of the motor, high energy utilization rate, long driving range of the vehicle and capability of giving consideration to the dynamic property and the economical efficiency of the whole vehicle.

Description

Split type double-motor coaxial wheel-side planet wheel speed reduction drive axle
Technical Field
The invention relates to the technical field of new energy automobile chassis, in particular to a split type double-motor coaxial wheel-side planet wheel speed reduction drive axle.
Background
In order to meet the market demand of new energy automobiles, more and more finished automobile manufacturers try to provide power by replacing an engine with a motor in the development of new automobile models, and most of the manufacturers adopt a motor externally-hung structure, namely a motor, a gearbox and a traditional integral axle. The structure has the following defects: firstly, the transmission efficiency loss is large due to the long transmission chain; secondly, because each part has a large volume, the chassis structure arrangement space is excessively occupied, the arrangement quantity of batteries is influenced, and the driving range of the vehicle is short; thirdly, the assembly has large self weight, so that the whole vehicle dynamic property and the economy are hardly considered. In addition, for a single motor driven axle, the arrangement space and the vehicle load are limited due to the limited power and specific power of the motor.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the split double-motor coaxial wheel-side planet wheel speed reduction drive axle which is compact in structural arrangement, relatively shortened in length of a transmission chain, capable of improving transmission efficiency, reducing the occupied space of an axle, reducing the weight of the whole axle, increasing the passenger capacity of a carriage, increasing the battery capacity and improving the driving range of a vehicle.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a coaxial wheel limit planet wheel speed reduction transaxle of split type bi-motor, includes first motor, first wheel reduction assembly, second wheel reduction assembly, first wheel assembly, second wheel assembly, independent suspension assembly and axle housing, its characterized in that: the device also comprises a first primary planetary gear speed reducing mechanism, a second primary planetary gear speed reducing mechanism and a second motor; the first motor and the first primary planetary gear speed reducing mechanism are positioned on one side of the middle part of the axle housing and are connected with the first wheel-side speed reducer assembly; the second motor and the second primary planetary gear speed reducing mechanism are positioned on the other side of the middle part of the axle housing and are connected with the second wheel-side speed reducer assembly; the first motor and the second motor are arranged on two sides of the center of the axle at intervals; the first motor, the second motor, the first primary planetary gear speed reducing mechanism, the second primary planetary gear speed reducing mechanism, the first wheel-side speed reducer assembly and the second wheel-side speed reducer assembly are coaxially arranged; the independent suspension assembly is arranged between the middle part of the axle housing and the two wheel edges; the first wheel reduction assembly is located in the first wheel assembly, and the second wheel reduction assembly is located in the second wheel assembly.
In the above scheme, the first primary planetary gear reduction mechanism includes a first sun gear, a first gear ring, a first planet gear, a first planet carrier and a third output shaft, the first wheel reduction assembly includes a second sun gear, a second gear ring, a second planet gear, a second planet carrier and a fourth output shaft, the first sun gear is mounted on the first output shaft of the first motor, the second sun gear is mounted on the third output shaft, and the fourth output shaft is connected with the first wheel; the second-stage planetary gear speed reducing mechanism comprises a third sun gear, a third gear ring, a third planetary gear, a third planet carrier and a fifth output shaft; the second hub reduction gear assembly comprises a fourth sun gear, a fourth gear ring, a fourth planet gear, a fourth planet carrier and a sixth output shaft, the third sun gear is arranged on a second output shaft of the second motor, the fourth sun gear is arranged on a fifth output shaft, and the sixth output shaft is connected with the second wheel; the first output shaft, the third output shaft, the fourth output shaft and the sixth output shaft are coaxially arranged.
In the above scheme, two ends of the fourth output shaft are respectively connected with the second planet carrier and the first wheel assembly; and two ends of the sixth output shaft are respectively connected with the fourth planet carrier and the second wheel assembly.
In the above scheme, the first gear ring, the second gear ring, the third gear ring and the fourth gear ring are fixedly connected to the axle housing.
In the above scheme, the first motor is the same as the second motor, the first primary planetary gear speed reducing mechanism is the same as the second primary planetary gear speed reducing mechanism, and the first motor and the first primary planetary gear speed reducing mechanism are symmetrically distributed on two sides of the axle housing center as well as the second motor and the second primary planetary gear speed reducing mechanism.
In the scheme, an independent suspension assembly is respectively arranged between the axle housing center and two wheel sides; the upper end of the independent suspension assembly is connected with an automobile body, and the lower end of the independent suspension assembly is connected with an axle housing.
In the above scheme, two ends of the fourth output shaft are respectively connected with the second planet carrier and the first wheel assembly; two ends of the sixth output shaft are respectively connected with the fourth planet carrier and the second wheel assembly; the first gear ring, the second gear ring, the third gear ring and the fourth gear ring are fixedly connected to the axle housing; the first motor and the second motor are the same, the first primary planetary gear speed reducing mechanism and the second primary planetary gear speed reducing mechanism are the same, and the first motor and the first primary planetary gear speed reducing mechanism, the second motor and the second primary planetary gear speed reducing mechanism are symmetrically distributed on two sides of the center of the axle housing; an independent suspension assembly is respectively arranged between the axle housing center and the two wheel sides; the upper end of the independent suspension assembly is connected with an automobile body, and the lower end of the independent suspension assembly is connected with an axle housing.
The two motors and the two-stage gear reduction mechanisms are integrated into a whole, the compact structural arrangement shortens the length of a transmission chain, improves the efficiency, reduces the space occupied by an axle, reduces the weight of the whole axle, increases the passenger capacity and the battery capacity of a carriage, and improves the driving range of the vehicle; the integral reliability is improved by the independent driving system of the double motors; the purposes of actively controlling differential speed and operating stability are achieved through a dual-motor independent control algorithm; the double motors are symmetrically and compactly distributed on two sides of the center of the axle, and independent suspension connection spaces are reserved at the center of the drive axle and two wheel sides.
Compared with the prior art, the invention has compact structure, high transmission efficiency, convenient structural arrangement of the chassis, light dead weight and good economical efficiency and safety of the whole vehicle.
The invention has the characteristics of relatively small occupied chassis structure arrangement space, no influence on the arrangement quantity of batteries, wide efficient working area of the motor, high energy utilization rate, long driving range of the vehicle and capability of giving consideration to the dynamic property and the economical efficiency of the whole vehicle.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. a first motor; 2. a second motor; 3. a first output shaft; 4. a first sun gear; 5. a first carrier; 6. a first ring gear; 7. a third output shaft; 8. a second sun gear; 9. a second ring gear; 10. a second planet carrier; 11. a second output shaft; 12. a third sun gear; 13. a third ring gear; 14. a third carrier; 15. a fifth output shaft; 16. a fourth sun gear; 17. a fourth ring gear; 18. a fourth planet carrier; 19. a sixth output shaft; 20. a second wheel assembly; 21. a fourth output shaft; 22. a first wheel assembly; 23. an independent suspension assembly; 24. a first planet gear; 25. a second planet wheel; 26. a third planet gear; 27. and a fourth star wheel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a split type double-motor coaxial wheel-side planet wheel speed reduction drive axle comprises a first motor 1, a second motor 2, a first one-level planet gear speed reduction mechanism, a second one-level planet gear speed reduction mechanism, a first wheel-side speed reducer assembly, a second wheel-side speed reducer assembly, a first wheel assembly 22, a second wheel assembly 20, an independent suspension assembly 23 and an axle housing. The first electric machine 1 comprises a first output shaft 2 and the second electric machine 2 comprises a second output shaft 11. The first primary planetary gear speed reducing mechanism comprises a first sun gear 4, a first gear ring 6, a first planet gear 24, a first planet carrier 5 and a third output shaft 7; the second-stage planetary gear speed reducing mechanism comprises a third sun gear 12, a third gear ring 13, a third planetary gear 26, a third planet carrier 14 and a fifth output shaft 15, the arrangement space of the first-stage planetary gear speed reducing mechanism and the second-stage planetary gear speed reducing mechanism is reduced, and the reliability of the speed reducing mechanism is improved.
The first hub reduction gear assembly comprises a second sun gear 8, a second gear ring 9, a second planet gear 25, a second planet carrier 10 and a fourth output shaft 21; the second wheel reduction assembly comprises a fourth sun gear 16, a fourth gear ring 17, a fourth planet gear 27, a fourth planet carrier 18 and a sixth output shaft 21, and the wheel base length is reduced by the first wheel reduction assembly and the second wheel reduction assembly. The first primary planetary gear speed reducing mechanism and the second primary planetary gear speed reducing mechanism are the same as the components of the first wheel reduction gear assembly and the second wheel reduction gear assembly, the power of the motor is output and then reduced through the primary planetary gear speed reducing mechanism, the power is transmitted to the wheels after being reduced through the wheel reduction gear assembly, the highest rotating speed of the motor is improved, and better dynamic performance is provided for the drive axle.
First motor 1, first primary planet gear reduction unit are located one side in axle housing middle part to with first wheel reduction gear assembly interconnect. The second motor 2 and the second primary planetary gear speed reducing mechanism are positioned on the other side of the middle part of the axle housing and are connected with the second wheel-side speed reducer assembly.
Two ends of a third output shaft 7 are respectively connected with the first planet carrier 5 and a second sun gear 8 of the first wheel reduction assembly, a first sun gear 4 is connected with a first output shaft 3 of the first motor 1, and two ends of a fourth output shaft 21 are respectively connected with a second planet carrier 10 and a first wheel assembly 22; the fifth output shaft 15 is connected at both ends to the third planet carrier 14 and the fourth sun gear 16 of the second wheel reduction assembly, respectively, the third sun gear 12 is connected to the second output shaft 11 of the second electric machine 2, and the sixth output shaft 19 is connected at both ends to the fourth planet carrier 18 and the second wheel assembly 20, respectively. The first gear ring 6, the second gear ring 9, the third gear ring 13 and the fourth gear ring 17 are fixedly connected to the axle housing. The first motor 1, the second motor 2, the first primary planetary gear speed reducing mechanism, the second primary planetary gear speed reducing mechanism, the first wheel reduction gear assembly and the second wheel reduction gear assembly are coaxially arranged and distributed in a straight line shape.
The first motor 1 is the same as the second motor 2, the first primary planetary gear speed reducing mechanism is the same as the second primary planetary gear speed reducing mechanism, and the first motor 1 and the first primary planetary gear speed reducing mechanism are symmetrically distributed on two sides of the center of the axle housing with the second motor 2 and the second primary planetary gear speed reducing mechanism. The power transmission chains of the first motor 1 and the second motor 2 are symmetrically distributed, the power transmission process is consistent, and the transmission efficiency is high. The first motor 1 and the second motor 2 are drive motors of the same type or different types.
The independent suspension assembly 23 is arranged between the middle part of the axle housing and two wheel edges, an independent suspension assembly 23 is respectively arranged between the axle housing center and the two wheel edges, the wheel edges refer to the axle housing positions beside the first wheel assembly 22 or the second wheel assembly 20, the upper end of the independent suspension assembly 23 is connected with an automobile body, and the lower end of the independent suspension assembly is connected with the axle housing. The first wheel reduction assembly is located within the first wheel assembly 22 and the second wheel reduction assembly is located within the second wheel assembly 20.
The drive axle of the invention integrates double motors, a symmetrical primary power planetary gear speed reducing mechanism and a primary wheel-side planetary gear speed reducing mechanism; the first wheel assembly 22 and the second wheel assembly 20 are driven independently by independent driving sources, and the driving wheels of the driving axles are wheels without mechanical power connection, so that independent torque output control can be performed, and active differential speed and torque differential control can be performed. The first motor 1 and the second motor 2 can be used by two low-power motors in a superposition manner, so that a high-power effect is achieved, and the use of a high-efficiency area of the motors is facilitated.
The invention has the following beneficial effects: 1. due to the design of double motors, the high-efficiency area of the motor is wider, and the use is more excellent; 2. each motor has small volume and more reasonable arrangement, and the space of the chassis is saved; 3. the double motors are symmetrically arranged, so that the problem of motor offset is solved, and the driving comfort of the vehicle is improved; 4. the wheel hub reducer is arranged, so that the trafficability and the dynamic property of the whole vehicle are improved; 5. the independent suspension design reduces the inclination and vibration of the vehicle body.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims (7)

1. The utility model provides a coaxial wheel limit planet wheel speed reduction transaxle of split type bi-motor, includes first motor (1), first wheel reduction assembly, second wheel reduction assembly, first wheel assembly (22), second wheel assembly (20), independent suspension assembly (23) and axle housing, its characterized in that: the device also comprises a first primary planetary gear speed reducing mechanism, a second primary planetary gear speed reducing mechanism and a second motor (2); the first motor (1) and the first primary planetary gear speed reducing mechanism are positioned on one side of the middle part of the axle housing and are connected with the first wheel-side speed reducer assembly; the second motor (2) and the second primary planetary gear speed reducing mechanism are positioned on the other side of the middle part of the axle housing and are connected with the second wheel-side speed reducer assembly; the first motor (1) and the second motor (2) are arranged on two sides of the center of the axle at intervals; the first motor (1), the second motor (2), the first primary planetary gear speed reducing mechanism, the second primary planetary gear speed reducing mechanism, the first wheel reduction gear assembly and the second wheel reduction gear assembly are coaxially arranged; the independent suspension assembly (23) is arranged between the middle part of the axle housing and two wheel edges; the first wheel reduction assembly is located within a first wheel assembly (22) and the second wheel reduction assembly is located within a second wheel assembly (20).
2. The split double-motor coaxial wheel-side planet wheel speed reduction drive axle of claim 1, wherein: the first primary planetary gear speed reducing mechanism comprises a first sun gear (4), a first gear ring (6), a first planetary gear (24), a first planet carrier (5) and a third output shaft (7), the first wheel side speed reducer assembly comprises a second sun gear (8), a second gear ring (9), a second planetary gear (25), a second planet carrier (10) and a fourth output shaft (21), the first sun gear (4) is installed on the first output shaft (3) of the first motor (1), the second sun gear (8) is installed on the third output shaft (7), and the fourth output shaft (21) is connected with the first wheel (22); the second-stage planetary gear speed reducing mechanism comprises a third sun gear (12), a third gear ring (13), a third planetary gear (26), a third planet carrier (14) and a fifth output shaft (15); the second hub reduction gear assembly comprises a fourth sun gear (16), a fourth gear ring (17), a fourth planet wheel (27), a fourth planet carrier (18) and a sixth output shaft (19), wherein the third sun gear (12) is arranged on a second output shaft (11) of the second motor (2), the fourth sun gear (16) is arranged on a fifth output shaft (15), and the sixth output shaft (19) is connected with a second wheel (20); the first output shaft (3), the third output shaft (11), the fourth output shaft (13) and the sixth output shaft (21) are coaxially arranged.
3. The split double-motor coaxial wheel-side planet wheel speed reduction drive axle of claim 2, wherein: two ends of the fourth output shaft (21) are respectively connected with the second planet carrier (10) and the first wheel assembly (22); and two ends of the sixth output shaft (19) are respectively connected with the fourth planet carrier (18) and the second wheel assembly (20).
4. The split double-motor coaxial wheel-side planet wheel speed reduction drive axle of claim 2, wherein: the first gear ring (6), the second gear ring (9), the third gear ring (13) and the fourth gear ring (17) are fixedly connected to the axle housing.
5. The split double-motor coaxial wheel-side planet wheel speed reduction drive axle of claim 2, wherein: the first motor (1) is the same as the second motor (2), the first primary planetary gear speed reducing mechanism is the same as the second primary planetary gear speed reducing mechanism, and the first motor (1) and the first primary planetary gear speed reducing mechanism are symmetrically distributed on two sides of the axle housing center along with the second motor (2) and the second primary planetary gear speed reducing mechanism.
6. The split double-motor coaxial wheel-side planetary wheel speed reduction drive axle according to claim 1 or 2, characterized in that: an independent suspension assembly (23) is respectively arranged between the axle housing center and the two wheel sides; the upper end of the independent suspension assembly (23) is connected with an automobile body, and the lower end of the independent suspension assembly is connected with an axle housing.
7. The split double-motor coaxial wheel-side planetary wheel speed reduction drive axle according to claim 1 or 2, characterized in that: two ends of the fourth output shaft (21) are respectively connected with the second planet carrier (10) and the first wheel assembly (22); two ends of the sixth output shaft (19) are respectively connected with the fourth planet carrier (18) and the second wheel assembly (20); the first gear ring (6), the second gear ring (9), the third gear ring (13) and the fourth gear ring (17) are fixedly connected to the axle housing; the first motor (1) is the same as the second motor (2), the first primary planetary gear speed reducing mechanism is the same as the second primary planetary gear speed reducing mechanism, and the first motor (1) and the first primary planetary gear speed reducing mechanism are symmetrically distributed on two sides of the center of the axle housing together with the second motor (2) and the second primary planetary gear speed reducing mechanism; an independent suspension assembly (23) is respectively arranged between the axle housing center and the two wheel sides; the upper end of the independent suspension assembly (23) is connected with an automobile body, and the lower end of the independent suspension assembly is connected with an axle housing.
CN201910877259.7A 2019-09-17 2019-09-17 Split type double-motor coaxial wheel-side planet wheel speed reduction drive axle Pending CN112519497A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910877259.7A CN112519497A (en) 2019-09-17 2019-09-17 Split type double-motor coaxial wheel-side planet wheel speed reduction drive axle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910877259.7A CN112519497A (en) 2019-09-17 2019-09-17 Split type double-motor coaxial wheel-side planet wheel speed reduction drive axle

Publications (1)

Publication Number Publication Date
CN112519497A true CN112519497A (en) 2021-03-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910877259.7A Pending CN112519497A (en) 2019-09-17 2019-09-17 Split type double-motor coaxial wheel-side planet wheel speed reduction drive axle

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114290889A (en) * 2021-06-30 2022-04-08 华为数字能源技术有限公司 Power device and vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114290889A (en) * 2021-06-30 2022-04-08 华为数字能源技术有限公司 Power device and vehicle

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