CN107091305B - Planetary gearbox for electric vehicles - Google Patents
Planetary gearbox for electric vehicles Download PDFInfo
- Publication number
- CN107091305B CN107091305B CN201710480370.3A CN201710480370A CN107091305B CN 107091305 B CN107091305 B CN 107091305B CN 201710480370 A CN201710480370 A CN 201710480370A CN 107091305 B CN107091305 B CN 107091305B
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- gear
- motor
- output shaft
- planetary
- meshed
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
- F16H3/46—Gearings having only two central gears, connected by orbital gears
- F16H3/58—Gearings having only two central gears, connected by orbital gears with sets of orbital gears, each consisting of two or more intermeshing orbital gears
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
- F16H3/46—Gearings having only two central gears, connected by orbital gears
- F16H3/48—Gearings having only two central gears, connected by orbital gears with single orbital gears or pairs of rigidly-connected orbital gears
- F16H3/52—Gearings having only two central gears, connected by orbital gears with single orbital gears or pairs of rigidly-connected orbital gears comprising orbital spur gears
- F16H3/54—Gearings having only two central gears, connected by orbital gears with single orbital gears or pairs of rigidly-connected orbital gears comprising orbital spur gears one of the central gears being internally toothed and the other externally toothed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps; Pressure control
- F16H57/0436—Pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps; Pressure control
- F16H57/0441—Arrangements of pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0482—Gearings with gears having orbital motion
- F16H57/0484—Gearings with gears having orbital motion with variable gear ratio or for reversing rotary motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02039—Gearboxes for particular applications
- F16H2057/02043—Gearboxes for particular applications for vehicle transmissions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02086—Measures for reducing size of gearbox, e.g. for creating a more compact transmission casing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H2057/087—Arrangement and support of friction devices in planetary gearings, e.g. support of clutch drums, stacked arrangements of friction devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
- F16H2200/2038—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes with three engaging means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
- Structure Of Transmissions (AREA)
Abstract
The invention discloses a planetary gear box for an electric automobile, which comprises a first motor, a second motor, a planetary gear mechanism and two brakes, wherein the two brakes are respectively used for braking output shafts of the first motor and the second motor; the planetary gear mechanism comprises a sun gear fixedly sleeved on the output shaft of the first motor, a planetary gear meshed with the sun gear, a planetary carrier with a power output shaft and an outer gear ring meshed with the planetary gear, and outer teeth are arranged on the outer gear ring; an output shaft of the second motor is connected with a biasing gear which rotates synchronously with the output shaft, and the biasing gear is meshed with the external teeth; a clutch is arranged between the sun gear and the outer gear ring, and the sun gear and the outer gear ring can be connected into a whole when the clutch is combined. The invention can meet the speed change requirements of the electric automobile under different working conditions, and has the advantages of compact structure, good reliability, full lubrication and the like.
Description
Technical Field
The invention belongs to the technical field of mechanical transmission, and relates to a planetary transmission for an electric automobile.
Background
In order to fully utilize the advantage of wide motor speed regulation range, the electric automobile usually adopts stepless speed change, and in the prior art, the planetary gear mechanism is utilized to realize stepless speed change, but the structure is difficult to realize the best matching with various working conditions of the vehicle, for example, the motor power is wasted unnecessarily in the process of charging the motor in the sliding or driving process, and the requirement of large torque is difficult to meet when climbing or heavy-load starting.
Disclosure of Invention
In order to solve the technical problems, the invention provides a planetary gear gearbox for an electric automobile, which has high transmission efficiency and can meet the speed change requirements of the electric automobile under different working conditions.
The technical scheme is as follows:
the planetary transmission for the electric automobile comprises a first motor, a second motor, a planetary gear mechanism and two brakes, wherein the brakes are used for braking output shafts of the first motor and the second motor respectively;
the planetary gear mechanism comprises a sun gear fixedly sleeved on the output shaft of the first motor, a planetary gear meshed with the sun gear, a planetary carrier with a power output shaft and an outer gear ring meshed with the planetary gear, and outer teeth are arranged on the outer gear ring;
an output shaft of the second motor is connected with a biasing gear which rotates synchronously with the output shaft, and the biasing gear is meshed with the external teeth;
a clutch is arranged between the sun gear and the outer gear ring, and the sun gear and the outer gear ring can be connected into a whole when the clutch is combined.
The gearbox with the structure can utilize the brake to brake one of the first motor and the second motor in driving, charging and sliding working conditions, namely, a single-motor working mode is adopted; the two brakes are released simultaneously, the planetary gear mechanism works, the whole planetary gear mechanism is equivalent to a rotating speed coupler, and a speed regulation working mode is entered to adapt to the low torque requirement of the vehicle under the condition of high-speed running; when the vehicle is in climbing and heavy-load starting, the sun gear and the gear ring can be combined through the clutch, and the planetary gear mechanism becomes a rigid body at the moment to carry out torque coupling so as to meet the requirement of large torque.
Further, the brake comprises a brake outer cover, an output hub rotatably arranged in the brake outer cover and a pressure plate opposite to the output hub, wherein the brake outer cover is fixed on a gearbox shell, at least two sliding steel discs are slidably embedded in the inner wall of the brake outer cover, an output shaft mounting hole is formed in the middle of the output hub, a friction disc is arranged on the outer edge of the output hub and extends between the two adjacent sliding steel discs, a retaining pressure spring is connected between the output hub and the pressure plate, at least two hydraulic cylinders are distributed on the outer side of the pressure plate, pistons are slidably arranged in the hydraulic cylinders, and the pistons are rigidly connected to the pressure plate. By adopting the piston type brake, the braking force when the output shafts of the first motor and the second motor are braked can be reliably ensured, and the reliability of the gearbox is improved.
In order to ensure that the braking force provided by the hydraulic cylinders and the pistons is uniformly applied to the pressure plate so as to ensure that the braking process is smooth and does not slip, the total number of the hydraulic cylinders is 4, and the hydraulic cylinders are uniformly distributed along the outer side circumference of the pressure plate.
Further, an input gear is fixedly sleeved on an output shaft of the second motor, an intermediate gear meshed with the input gear is meshed with the offset gear, the intermediate gear and the offset gear are rotatably arranged in the gearbox shell through an intermediate gear shaft and an offset gear shaft respectively, so that the kinetic energy of the second motor is transmitted to the offset gear through the intermediate gear, the internal arrangement of the gearbox can be facilitated, the assembly is facilitated, and the speed regulation range of the second motor is enlarged.
Further, the power output shaft and the output shaft of the second motor are respectively sleeved with a lubricant pump driving gear, two lubricant pump driving gears are respectively meshed with a lubricant pump driven gear, each lubricant pump driven gear respectively drives one lubricant pump, and the two output shafts are respectively provided with corresponding oil ducts, so that the two lubricant pumps are driven by the power of the two output shafts, and reliable lubrication of the gearbox is ensured.
The beneficial effects are that: the planetary gear box for the electric automobile can meet the speed change requirements of the electric automobile under different working conditions, and has the advantages of compact structure, good reliability, full lubrication and the like.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an assembly view of one embodiment of the present invention;
FIG. 3 is a schematic diagram of a planetary gear mechanism;
FIG. 4 is a schematic structural view of a brake;
fig. 5 is a schematic diagram of a lubrication structure on the output shaft of the second motor.
Detailed Description
The present invention will be further described in detail below with reference to examples, which are provided to illustrate the objects, technical solutions and advantages of the present invention. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
A planetary gear box for an electric vehicle as shown in fig. 1 and 2 includes a gear box housing 8, a first motor 1, a second motor 2, and a planetary gear mechanism 3, the first motor 1 and the second motor 2 are mounted outside the gear box housing 8, the output ends thereof are each provided with a brake 4 for braking the output shafts of the first motor 1 and the second motor 2, and the planetary gear mechanism 3 is mounted in the gear box housing 8.
An input gear 21 is fixedly sleeved on the output shaft of the second motor 2, an intermediate gear 22 is meshed with the input gear 21, a bias gear 6 is meshed with the intermediate gear 22, the intermediate gear 22 and the bias gear 6 are respectively rotatably installed in the gearbox housing 8 through an intermediate gear shaft 23 and a bias gear shaft 61, and the bias gear 6 is externally meshed with the outer gear ring 34 and can synchronously rotate with the output shaft of the second motor 2 under the drive of the second motor 2.
Fig. 3 shows a specific structure of the planetary gear mechanism 3, a sun gear 31, a planetary gear 32 meshed with the sun gear 31, a carrier 33 with the power take-off shaft 5, and an outer gear ring 34 meshed with the planetary gear 32.
The sun gear 31 is fixedly sleeved on the output shaft 1a of the first motor 1, the outer gear ring 34 is positioned outside the sun gear 31, a plurality of planetary gears 32 are meshed between the sun gear 31 and the outer gear ring 34, a clutch 7 is further arranged between the sun gear 31 and the outer gear ring 34, and the sun gear 31 and the outer gear ring 34 can be connected into a whole when the clutch 7 is combined.
One side of the outer gear ring 34 is fixedly connected with an external tooth 34a of a fluted disc structure through a retainer 34b so as to be meshed with the offset gear 6, the external tooth 34a is supported by a bearing with the power output shaft 5, and the planet carrier 33 of the planet gear 32 is connected with the power output shaft 5 through a spline.
Fig. 4 is a schematic structural view of a brake 4 fitted over an output shaft 2a of the second motor 2, the brake 4 including a brake housing 41, an output hub 42 rotatably mounted in the brake housing 41, and a pressure plate 43 facing the output hub 42, the brake housing 41 being fixed to the transmission case 8, a slide groove 41a being provided on an inner wall of the brake housing 41, and 4 slide steel plates 44 being slidably fitted, and one fixed steel plate 44a being fixed to a left end portion of the slide groove 41a in the drawing.
The middle part of the output hub 42 is provided with an output shaft mounting hole 42a, and is fixedly sleeved on the output shaft 2a of the second motor 2 through the output shaft mounting hole 42a, the outer edge of the output hub 42 is provided with 4 outwardly extending friction discs 45, and the friction discs 45 extend between two adjacent sliding steel discs 44.
The pressure plate 43 is rotatably sleeved on the output shaft 2a through a rolling bearing, a retaining pressure spring 46 is arranged between the output hub 42 and the pressure plate 43, the friction plate 45 is kept not in tight contact with the sliding steel plate 44 in a normal state, namely in a non-braking state, four hydraulic oil cylinders 47 are uniformly distributed on the outer side of the pressure plate 43 along the circumferential direction, pistons 48 are slidably arranged in the hydraulic oil cylinders 47, the pistons 48 are rigidly connected to the pressure plate 43, and when hydraulic oil is introduced into the hydraulic oil cylinders 47 so as to push the pistons 48 to move leftwards, the pressure plate 43 can force the sliding steel plate 44 to move transversely and press the friction plate 45, so that the output shaft 2a of the second motor 2 is locked with the gearbox housing 8, and braking of the output shaft 2a of the second motor 2 is realized.
The other brake 4, i.e. the brake 4 for braking the output shaft 1a of the first motor 1 and the clutch 7, are similar in structure to the brake 4 sleeved on the output shaft 2a of the second motor 2, and are in the form of cylinder pistons, and the brake 4 for braking the output shaft 1a of the first motor 1 directly acts on the sun gear 31.
For convenient lubrication, the power output shaft 5 and the output shaft of the second motor 2 are respectively sleeved with a lubricant pump driving gear 9, two lubricant pump driving gears 9 are respectively meshed with a lubricant pump driven gear 9a, and each lubricant pump driven gear 9a respectively drives one lubricant pump 9b.
Fig. 5 is a schematic view of the lubrication structure shown in fig. 1, which is disposed on the upper left side of the output shaft 2a of the second motor 2, wherein the lubrication pump driving gear 9 is fixedly sleeved on the output shaft 2a of the second motor 2, the lubrication pump driven gear 9a is fixedly sleeved on the oil pump shaft of the lubrication pump 9b and is meshed with the lubrication pump driving gear 9 to drive the lubrication pump 9b, and the lubrication pump 9b is installed in the transmission housing 8.
Corresponding lubrication oil passages are provided on the power output shaft 5 and the output shaft 2a of the second motor 2, and are communicated with corresponding lubrication oil pumps 9b to lubricate the output shaft, the planetary gear mechanism, the brake and the clutch.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the technical solution, and although the applicant has described the present invention in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents of the technical solution of the present invention can be made without departing from the spirit and scope of the technical solution, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present invention.
Claims (4)
1. Planetary gearbox for electric automobile, including first motor (1), second motor (2) and planetary gear mechanism (3), its characterized in that: the motor also comprises two brakes (4) which are respectively used for braking the output shafts of the first motor (1) and the second motor (2);
the planetary gear mechanism (3) comprises a sun gear (31) fixedly sleeved on the output shaft of the first motor (1), a planetary gear (32) meshed with the sun gear (31), a planetary carrier (33) with a power output shaft (5) and an outer gear ring (34) meshed with the planetary gear (32), and outer teeth (34 a) are arranged on the outer gear ring (34);
an output shaft of the second motor (2) is connected with a biasing gear (6) which rotates synchronously with the output shaft, and the biasing gear (6) is meshed with external teeth (34 a); an external tooth (34 a) of a fluted disc structure is fixedly connected to one side of the external tooth ring (34) through a retainer (34 b) so as to be meshed with the offset gear (6), the external tooth (34 a) is supported with the power output shaft (5) through a bearing, and a planet carrier (33) of the planet gear (32) is connected with the power output shaft (5) through a spline;
a clutch (7) is arranged between the sun gear (31) and the outer gear ring (34), and the sun gear (31) and the outer gear ring (34) can be connected into a whole when the clutch (7) is combined;
during driving, charging and sliding working conditions, one of the first motor (1) and the second motor (2) is braked by utilizing a brake (4), namely a single motor working mode is adopted; the two brakes (4) are released simultaneously, the planetary gear mechanism (3) works and enters a speed regulation working mode so as to adapt to the low torque requirement of the vehicle under the condition of high-speed running; when the vehicle is in climbing and heavy-load starting, the sun gear (31) and the outer gear ring (34) are combined through the clutch, and at the moment, the planetary gear mechanism (3) becomes a rigid body to carry out torque coupling so as to meet the requirement of large torque;
the power output shaft (5) and the output shaft of the second motor (2) are respectively sleeved with a lubricant pump driving gear (9), two lubricant pump driving gears (9) are respectively meshed with a lubricant pump driven gear (9 a), and each lubricant pump driven gear (9 a) drives one lubricant pump (9 b);
the lubrication pump driving gear (9) is fixedly sleeved on the output shaft (2 a) of the second motor (2), the lubrication pump driven gear (9 a) is fixedly sleeved on the oil pump shaft of the lubrication pump (9 b) and meshed with the lubrication pump driving gear (9) so as to drive the lubrication pump (9 b), and the lubrication pump (9 b) is arranged in the gearbox housing (8);
corresponding lubricating oil channels are arranged on the power output shaft (5) and the output shaft (2 a) of the second motor (2) and are communicated with corresponding lubricating oil pumps (9 b) so as to lubricate the power output shaft (5), the planetary gear mechanism (3), the brake (4) and the clutch.
2. The planetary gearbox for an electric vehicle according to claim 1, wherein: the brake (4) comprises a brake housing (41), an output hub (42) rotatably arranged in the brake housing (41) and a pressure plate (43) opposite to the output hub (42), the brake housing (41) is fixed on a gearbox housing (8), at least two sliding steel discs (44) are slidably embedded in the inner wall of the brake housing (41), an output shaft mounting hole (42 a) is formed in the middle of the output hub (42), a friction disc (45) is arranged on the outer edge of the output hub (42), the friction disc (45) stretches into the space between the two adjacent sliding steel discs (44), a retaining pressure spring (46) is connected between the output hub (42) and the pressure plate (43), at least two hydraulic cylinders (47) are distributed on the outer side of the pressure plate (43), pistons (48) are slidably arranged in the hydraulic cylinders (47), and the pistons (48) are rigidly connected to the pressure plate (43).
3. The planetary gearbox for an electric vehicle according to claim 2, wherein: the number of the hydraulic cylinders (47) is 4, and the hydraulic cylinders are uniformly distributed along the outer circumference of the outer side of the pressure plate (43).
4. The planetary gearbox for an electric vehicle according to claim 2, wherein: an input gear (21) is fixedly sleeved on the output shaft of the second motor (2), an intermediate gear (22) is meshed with the input gear (21), the intermediate gear (22) is meshed with the offset gear (6), and the intermediate gear (22) and the offset gear (6) are rotatably mounted in the gearbox housing (8) through an intermediate gear shaft (23) and an offset gear shaft (61) respectively.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710212022.8A CN106931101A (en) | 2017-04-01 | 2017-04-01 | Planetary Gearboxes for Electric Vehicles |
| CN2017102120228 | 2017-04-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107091305A CN107091305A (en) | 2017-08-25 |
| CN107091305B true CN107091305B (en) | 2023-11-07 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710212022.8A Pending CN106931101A (en) | 2017-04-01 | 2017-04-01 | Planetary Gearboxes for Electric Vehicles |
| CN201710480370.3A Active CN107091305B (en) | 2017-04-01 | 2017-06-22 | Planetary gearbox for electric vehicles |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710212022.8A Pending CN106931101A (en) | 2017-04-01 | 2017-04-01 | Planetary Gearboxes for Electric Vehicles |
Country Status (1)
| Country | Link |
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| CN (2) | CN106931101A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019153146A1 (en) * | 2018-02-07 | 2019-08-15 | 深圳市万维博新能源技术有限公司 | New-energy at transmission |
| CN109442005A (en) * | 2018-12-28 | 2019-03-08 | 东风商用车有限公司 | A structure of a large speed ratio high speed planetary gear train reducer |
| CN113236731B (en) * | 2021-05-10 | 2023-01-06 | 柳工柳州传动件有限公司 | Planetary gearboxes and electric construction machinery |
| CN114759730B (en) * | 2022-04-11 | 2025-10-24 | 太原理工大学 | A vibration energy recovery device with adjustable damping based on helical planetary gear transmission |
| CN116766917A (en) * | 2023-07-20 | 2023-09-19 | 昆明理工大学 | Double-motor planetary gear driving system of pure electric vehicle and working mode switching method |
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| CN107091305A (en) | 2017-08-25 |
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