CN113007291A - Electrically-driven heavy truck multi-gear transmission system and control method thereof - Google Patents

Electrically-driven heavy truck multi-gear transmission system and control method thereof Download PDF

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Publication number
CN113007291A
CN113007291A CN202110223503.5A CN202110223503A CN113007291A CN 113007291 A CN113007291 A CN 113007291A CN 202110223503 A CN202110223503 A CN 202110223503A CN 113007291 A CN113007291 A CN 113007291A
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China
Prior art keywords
motor
gear
output shaft
intermediate shaft
dog clutch
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CN202110223503.5A
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Chinese (zh)
Inventor
郝庆军
冯涛
耿建涛
陆中华
曹铮
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Capotech Suzhou Co ltd
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Capotech Suzhou Co ltd
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Priority to CN202110223503.5A priority Critical patent/CN113007291A/en
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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
    • 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
    • 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
    • F16H57/082—Planet carriers
    • 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
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/04—Smoothing ratio shift
    • 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
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/32—Electric motors actuators or related electrical control means therefor
    • 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
    • F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
    • F16H2200/0056—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising seven forward speeds

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

The invention provides an electrically driven heavy truck multi-gear transmission system and a control method thereof, wherein the hybrid drive system comprises: the device comprises a first motor (24), a second motor (1), a first motor intermediate shaft (18), a second motor intermediate shaft (12), a power output shaft (30) and a third motor (23); the three-motor input mode is adopted, so that different forms of power coupling under multiple working conditions are realized, and the multi-gear transmission requirements of the new energy electrically-driven heavy truck under different working conditions are met; two motors are always kept to drive in the switching process of each mode, and one motor is used for regulating the speed, so that the continuity of power switching is ensured; through controlling the mutual working cooperation of three clutches, realize 7 mode through 4 pairs of output gear to satisfy the multi-gear transmission demand under the different operating modes of new forms of energy electric drive heavy truck.

Description

Electrically-driven heavy truck multi-gear transmission system and control method thereof
Technical Field
The invention relates to the technical field of new energy electrically-driven multiple-gear transmission systems for heavy trucks, in particular to an electrically-driven multiple-gear transmission system for heavy trucks and a control method thereof.
Background
With the continuous development of new energy electrically driven heavy trucks technology, especially in the field of mining trucks, its demand on transmission systems is increasing. Heavy truck electric drive transmission systems in the prior art market suffer from the following disadvantages:
(1) the system has a large mass. A low-speed large-torque motor is mostly adopted, so that the power is low and the weight is heavy.
(2) The system has few gears, and the extreme application working condition can not realize comprehensive coverage.
(3) The total power of the double motors is limited, and the system dynamic performance is weak on a large-tonnage heavy truck; on one hand, the vehicle speed is low when heavy load goes up a slope, and the vehicle operation efficiency is influenced; on the other hand, when heavy load is carried out downhill, the brake needs to be stepped, the energy recovery is insufficient, and the power consumption is influenced.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention provides an electrically-driven heavy truck multi-gear transmission system and a control method thereof.
The technical scheme provided by the invention is as follows: an electrically driven heavy truck multiple speed transmission system, the transmission system comprising:
the output shaft of the first motor (24) is connected with a first motor intermediate shaft (18) through a first motor transmission gear pair;
the output shaft (2) of the second motor (1) is connected with a second motor intermediate shaft (12) through a second motor transmission gear pair;
the gear shifting device comprises a first motor intermediate shaft (18), wherein a first dog clutch A (16) is arranged on the first motor intermediate shaft (18), and a 1-gear driving gear (17) and a 3-gear driving gear (15) are respectively sleeved on two sides of the first dog clutch A (16) in a connectable mode in an empty mode;
the clutch comprises a second motor intermediate shaft (12), wherein a second dog clutch B (10) and a third dog clutch CU (13) are arranged on the second motor intermediate shaft (12), a 2-gear driving gear (11) and a 4-gear driving gear (9) are respectively sleeved on two sides of the second dog clutch B (10) in a connectable mode in an empty mode, and the third dog clutch CU (13) is arranged between the first motor intermediate shaft (18) and the second motor intermediate shaft (12) to realize connection and disconnection of the first motor intermediate shaft (18) and the second motor intermediate shaft (12);
the power output shaft (30) is fixedly connected with a 1-gear driven gear (25), a 3-gear driven gear (26), a 2-gear driven gear (28) and a 4-gear driven gear (29) respectively; the 1-gear driven gear (25) is correspondingly meshed with the 1-gear driving gear (17) to form a 1-gear pair, the 3-gear driven gear (26) is correspondingly meshed with the 3-gear driving gear (15) to form a 3-gear pair, the 2-gear driven gear (28) is correspondingly meshed with the 2-gear driving gear (11) to form a 2-gear pair, and the 4-gear driven gear (29) is correspondingly meshed with the 4-gear driving gear (9) to form a 4-gear pair;
and an output shaft of the third motor (23) is connected with the power output shaft (30).
Further, 3 motors are arranged in a triangular shape in spatial section.
Further, the first motor transmission gear pair comprises a first motor driving gear (27) and a first motor driven gear (14) which are meshed with each other, the first motor driving gear (27) is fixedly connected with an output shaft of the first motor (24), and the first motor driven gear (14) is fixedly connected with the first motor intermediate shaft (18).
Furthermore, the second motor transmission gear pair comprises a second motor driving gear (7) and a second motor driven gear (8) which are meshed with each other, the second motor driving gear (7) is fixedly connected with an output shaft (2) of the second motor (1), and the second motor driven gear (8) is fixedly connected with the second motor intermediate shaft (12).
Further, the output shaft of the third motor (23) is connected with the power output shaft (30) through a planetary row; the third motor (23) is arranged on the same side as the first motor (1) and the second motor (24).
Further, the third motor (23) adopts a high-speed motor.
Further, the planet row comprises a sun gear (22) connected with an output shaft of the third motor (23), a plurality of planet gears (21) which are arranged on the periphery of the sun gear (22) and can rotate around the sun gear (22), a planet carrier (19) connected with the planet gears (21), and a ring gear (20) which is arranged on the periphery of the planet gears (21), is meshed with the planet gears (21) to rotate and is connected with the power output shaft (30).
Further, the third motor (23) is arranged at the end of the power output shaft (30), and the third motor (23) is arranged at the opposite side of the first motor (1) and the second motor (24).
Further, the third motor (23) adopts a low-speed motor.
Further, output shaft (2) of second motor (1) still is connected with mechanical two-way pump (5) and power takeoff (6) through oil pump gear pair, oil pump gear pair includes intermeshing's oil pump driving gear (3) and oil pump driven gear (4), oil pump driving gear (3) with output shaft (2) fixed connection of second motor (1), oil pump driven gear (4) and oil pump jackshaft fixed connection.
Compared with the prior art, the invention has the following beneficial effects:
1) the invention provides a multi-gear transmission system of an electrically driven heavy truck and a control method thereof, wherein a three-motor input mode is adopted to realize different forms of power coupling under multiple working conditions so as to meet the multi-gear transmission requirements of a new energy electrically driven heavy truck under different working conditions;
2) the invention provides an electrically-driven heavy truck multi-gear transmission system and a control method thereof, wherein three motors are adopted for driving, two motors are always kept for driving in the switching process of each mode, and one motor is used for regulating the speed, so that the continuity of power switching is ensured;
3) the invention provides an electrically-driven heavy truck multi-gear transmission system and a control method thereof, wherein three clutches are controlled to work and cooperate with each other, and 7 working modes are realized through 4 pairs of output gears, so that multi-gear transmission requirements of a new energy electrically-driven heavy truck under different working conditions are met.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
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.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 shows an electrically driven multiple-speed transmission system according to embodiment 1 of the present invention, wherein the hybrid drive system includes:
the output shaft of the first motor 24 is connected with the first motor intermediate shaft 18 through a first motor transmission gear pair;
the output shaft 2 of the second motor 1 is connected with a mechanical bidirectional pump 5 and a power takeoff 6 through an oil pump gear pair, and the output shaft 2 of the second motor 1 is connected with a second motor intermediate shaft 12 through a second motor transmission gear pair;
the first motor intermediate shaft 18 is provided with a first dog clutch A16, and two sides of the first dog clutch A16 are respectively sleeved with a 1-gear driving gear 17 and A3-gear driving gear 15 in a connectable manner in a hollow manner;
a second motor intermediate shaft 12, wherein a second dog clutch B10 and a third dog clutch CU13 are arranged on the second motor intermediate shaft 12, a 2-gear driving gear 11 and a 4-gear driving gear 9 are respectively sleeved on two sides of the second dog clutch B10 in a connectable manner, and the third dog clutch CU13 is arranged between the first motor intermediate shaft 18 and the second motor intermediate shaft 12 to realize connection and disconnection of the first motor intermediate shaft 18 and the second motor intermediate shaft 12;
a power output shaft 30, wherein a 1-gear driven gear 25, a 3-gear driven gear 26, a 2-gear driven gear 28 and a 4-gear driven gear 29 are fixedly connected to the power output shaft 30; the 1-gear driven gear 25 is correspondingly meshed with the 1-gear driving gear 17 to form a 1-gear pair, the 3-gear driven gear 26 is correspondingly meshed with the 3-gear driving gear 15 to form a 3-gear pair, the 2-gear driven gear 28 is correspondingly meshed with the 2-gear driving gear 11 to form a 2-gear pair, and the 4-gear driven gear 29 is correspondingly meshed with the 4-gear driving gear 9 to form a 4-gear pair;
a third motor 23, an output shaft of the third motor 23 is connected with the power output shaft 30 through a planetary row;
a planetary row which comprises a sun gear 22 connected with an output shaft of the third motor 23, a plurality of planetary gears 21 positioned on the periphery of the sun gear 22 and capable of rotating around the sun gear 22, a planetary carrier 19 connected with the planetary gears 21, and a ring gear 20 positioned on the periphery of the plurality of planetary gears 21 and meshed with the planetary gears 21 to rotate and connected with the power output shaft 30;
specifically, the first motor transmission gear pair includes a first motor driving gear 27 and a first motor driven gear 14 which are engaged with each other, the first motor driving gear 27 is fixedly connected with an output shaft of the first motor 24, and the first motor driven gear 14 is fixedly connected with the first motor intermediate shaft 18.
Specifically, the oil pump gear pair includes intermeshing's oil pump driving gear 3 and oil pump driven gear 4, oil pump driving gear 3 with the output shaft 2 fixed connection of second motor 1, oil pump driven gear 4 and oil pump jackshaft fixed connection.
Specifically, the second motor transmission gear pair includes a second motor driving gear 7 and a second motor driven gear 8 which are engaged with each other, the second motor driving gear 7 is fixedly connected with the output shaft 2 of the second motor 1, and the second motor driven gear 8 is fixedly connected with the second motor intermediate shaft 12.
The first motor 24, the second motor 1, and the third motor 23 are spatially arranged in a triangular shape (accordingly, a connecting line between the first motor driving gear 27 and the first motor driven gear 14 is a broken line in fig. 1), that is, 3 motors are spatially arranged in a triangular shape in cross section from a side view direction.
Specifically, embodiment 1 of the present invention also provides a method for controlling an electrically driven multiple-speed transmission system, the system including the following operating modes (as shown in table 1):
TABLE 1 operating position table of each clutch of the system under each mode
Figure DEST_PATH_IMAGE002
Note: the check square indicates the corresponding engagement position of each dog clutch in each mode.
Mode 1
The first dog clutch A16 is combined on the left, the third dog clutch CU13 is combined on the left, the output power of the first motor 24 is transmitted to the first motor intermediate shaft 18 through the first motor transmission gear pair, the output power of the second motor 1 is transmitted to the second motor intermediate shaft 12 through the second motor transmission gear pair, the first motor intermediate shaft 18 is connected with the second motor intermediate shaft 12, the power is converged and transmitted to the power output shaft 30 through the 1-gear pair, meanwhile, the output power of the third motor 23 is transmitted to the power output shaft 30 through the planetary gear pair, and the power is output together after being converged again; the gear is used for escaping from the trouble and is used for obstacle crossing and other unconventional working conditions.
Mode 2
The first dog clutch A16 is combined on the left, the third dog clutch CU13 is disengaged, the second dog clutch B10 is combined on the left, the output power of the first motor 24 is transmitted to the first motor intermediate shaft 18 through the first motor transmission gear pair and then transmitted to the power output shaft 30 through the 1-gear pair; the output power of the second motor 1 is transmitted to a second motor intermediate shaft 12 through a second motor transmission gear pair and then transmitted to a power output shaft 30 through a 2-gear pair; the output power of the first motor 24 and the second motor 1 is coupled at the power output shaft 30, and the output power of the third motor 23 is transmitted to the power output shaft 30 through the planetary row, and the power is converged again and then output together, which is the starting gear.
Mode 3
The first dog clutch A16 is disengaged, the second dog clutch B10 is combined on the left, the third dog clutch CU13 is combined on the left, the output power of the first motor 24 is transmitted to the first motor intermediate shaft 18 through the first motor transmission gear pair, the output power of the second motor 1 is transmitted to the second motor intermediate shaft 12 through the second motor transmission gear pair, the first motor intermediate shaft 18 is connected with the second motor intermediate shaft 12, the power is transmitted to the power output shaft 30 through the 2-gear pair after being converged, meanwhile, the output power of the third motor 23 is transmitted to the power output shaft 30 through the planetary gear pair, and the power is output together after being converged again.
Mode 4
The first dog clutch A16 is combined right, the second dog clutch B10 is combined left, the third dog clutch CU13 is disengaged, the output power of the first motor 24 is transmitted to the first motor intermediate shaft 18 through the first motor transmission gear pair and then transmitted to the power output shaft 30 through the 3-gear pair; the output power of the second motor 1 is transmitted to a second motor intermediate shaft 12 through a second motor transmission gear pair and then transmitted to a power output shaft 30 through a 2-gear pair; the output power of the first motor 24 and the second motor 1 is coupled at the power output shaft 30, and the output power of the third motor 23 is transmitted to the power output shaft 30 through the planetary row, and the power is output together after being converged again.
Mode 5
The right combination of the first dog clutch A16, the disengagement of the second dog clutch B10, the left combination of the third dog clutch CU13, the output power of the first motor 24 is transmitted to the first motor intermediate shaft 18 through the first motor transmission gear pair, the output power of the second motor 1 is transmitted to the second motor intermediate shaft 12 through the second motor transmission gear pair, the first motor intermediate shaft 18 and the second motor intermediate shaft 12 are connected, the power is transmitted to the power output shaft 30 through the 3-gear pair after being converged, meanwhile, the output power of the third motor 23 is transmitted to the power output shaft 30 through the planetary row, and the power is output together after being converged again.
Mode 6
The first dog clutch A16 is combined right, the second dog clutch B10 is combined right, the third dog clutch CU13 is disengaged, the output power of the first motor 24 is transmitted to the first motor intermediate shaft 18 through the first motor transmission gear pair and then transmitted to the power output shaft 30 through the 3-gear pair; the output power of the second motor 1 is transmitted to a second motor intermediate shaft 12 through a second motor transmission gear pair and then transmitted to a power output shaft 30 through a 4-gear pair; the output power of the first motor 24 and the second motor 1 is coupled at the power output shaft 30, and the output power of the third motor 23 is transmitted to the power output shaft 30 through the planetary row, and the power is output together after being converged again.
Mode 7
The first dog clutch A16 is disengaged, the second dog clutch B10 is engaged on the right, the third dog clutch CU13 is engaged on the left, the output power of the first motor 24 is transmitted to the first motor intermediate shaft 18 through the first motor transmission gear pair, the output power of the second motor 1 is transmitted to the second motor intermediate shaft 12 through the second motor transmission gear pair, the first motor intermediate shaft 18 is connected with the second motor intermediate shaft 12, the power is converged and transmitted to the power output shaft 30 through the 4-gear pair, meanwhile, the output power of the third motor 23 is transmitted to the power output shaft 30 through the planet row, and the power is output together after being converged again, namely, the high-speed gear.
The switching process among the working modes is as follows:
mode 2 or mode 3 is selected to start, modes 4, 5, 6 are normal gears, and mode 7 is the highest vehicle speed gear.
During the upshift, when the mode 2 is switched to the mode 3, the first dog clutch a16 is disengaged, the second motor 1 and the third motor 23 maintain power, and the third dog clutch CU13 is engaged after the speed of the first motor 24 is adjusted, thereby completing the switching from the mode 2 to the mode 3.
When the mode 3 is switched to the mode 4, the second dog clutch B10 is kept engaged, the third dog clutch CU13 is disengaged, the first dog clutch A16 returns to the neutral gear, the second motor 1 and the third motor 23 are kept driven, the first motor 24 adjusts the speed, the first dog clutch A16 is engaged to the right after the speed adjustment is finished, and the mode 3 is switched to the mode 4.
When the mode 4 is switched to the mode 5, the first dog clutch a16 is kept engaged, the second dog clutch B10 returns to the neutral gear, the first motor 24 and the third motor 23 are kept in power driving, the second motor 1 performs motor speed regulation, and after the speed regulation is completed, the third dog clutch CU13 is engaged to the left, so that the mode 4 is switched to the mode 5.
When the mode 5 is switched to the mode 6, the first dog clutch A16 is kept in right combination, the third dog clutch CU13 is disconnected, the first motor 24 and the third motor 23 are kept in power driving, the second motor 1 carries out motor speed regulation, and the second dog clutch B10 is combined right after the speed regulation is finished, so that the mode 5 is switched to the mode 6.
When the mode 6 is switched to the mode 7, the second dog clutch B10 is kept engaged, the first dog clutch A16 is disengaged, the second motor 1 and the third motor 23 are kept in power driving, the first motor 24 carries out motor speed regulation, and the third dog clutch CU13 is engaged on the left after the speed regulation is finished, so that the mode 6 is switched to the mode 7.
The downshift is performed in the same manner and in reverse.
Fig. 2 shows an electrically driven multiple-speed transmission system according to embodiment 2 of the present invention, wherein the hybrid drive system includes:
the output shaft of the first motor 24 is connected with the first motor intermediate shaft 18 through a first motor transmission gear pair;
the output shaft 2 of the second motor 1 is connected with a mechanical bidirectional pump 5 and a power takeoff 6 through an oil pump gear pair, and the output shaft 2 of the second motor 1 is connected with a second motor intermediate shaft 12 through a second motor transmission gear pair;
the first motor intermediate shaft 18 is provided with a first dog clutch A16, and two sides of the first dog clutch A16 are respectively sleeved with a 1-gear driving gear 17 and A3-gear driving gear 15 in a connectable manner in a hollow manner;
a second motor intermediate shaft 12, wherein a second dog clutch B10 and a third dog clutch CU13 are arranged on the second motor intermediate shaft 12, a 2-gear driving gear 11 and a 4-gear driving gear 9 are respectively sleeved on two sides of the second dog clutch B10 in a connectable manner, and the third dog clutch CU13 is arranged between the first motor intermediate shaft 18 and the second motor intermediate shaft 12 to realize connection and disconnection of the first motor intermediate shaft 18 and the second motor intermediate shaft 12;
a power output shaft 30, wherein a 1-gear driven gear 25, a 3-gear driven gear 26, a 2-gear driven gear 28 and a 4-gear driven gear 29 are fixedly connected to the power output shaft 30; the 1-gear driven gear 25 is correspondingly meshed with the 1-gear driving gear 17 to form a 1-gear pair, the 3-gear driven gear 26 is correspondingly meshed with the 3-gear driving gear 15 to form a 3-gear pair, the 2-gear driven gear 28 is correspondingly meshed with the 2-gear driving gear 11 to form a 2-gear pair, and the 4-gear driven gear 29 is correspondingly meshed with the 4-gear driving gear 9 to form a 4-gear pair;
a third motor 23, an output shaft of the third motor 23 is connected with the power output shaft 30, and the third motor 23 is arranged at the end of the power output shaft 30, that is, the third motor 23 is arranged opposite to the first motor 1 and the second motor 24;
specifically, the first motor transmission gear pair includes a first motor driving gear 27 and a first motor driven gear 14 which are engaged with each other, the first motor driving gear 27 is fixedly connected with an output shaft of the first motor 24, and the first motor driven gear 14 is fixedly connected with the first motor intermediate shaft 18.
Specifically, the oil pump gear pair includes intermeshing's oil pump driving gear 3 and oil pump driven gear 4, oil pump driving gear 3 with the output shaft 2 fixed connection of second motor 1, oil pump driven gear 4 and oil pump jackshaft fixed connection.
Specifically, the second motor transmission gear pair includes a second motor driving gear 7 and a second motor driven gear 8 which are engaged with each other, the second motor driving gear 7 is fixedly connected with the output shaft 2 of the second motor 1, and the second motor driven gear 8 is fixedly connected with the second motor intermediate shaft 12.
The first motor 24, the second motor 1, and the third motor 23 are spatially arranged in a triangular shape (accordingly, a connecting line between the first motor driving gear 27 and the first motor driven gear 14 is a broken line in fig. 1), that is, 3 motors are spatially arranged in a triangular shape in cross section from a side view direction.
Specifically, embodiment 2 of the present invention also provides a method for controlling an electrically driven multiple-speed transmission system, the system including the following operating modes (as shown in table 1):
TABLE 1 operating position table of each clutch of the system under each mode
Figure DEST_PATH_IMAGE004
Note: the check square indicates the corresponding engagement position of each dog clutch in each mode.
Mode 1
The first dog clutch A16 is combined on the left, the third dog clutch CU13 is combined on the left, the output power of the first motor 24 is transmitted to the first motor intermediate shaft 18 through the first motor transmission gear pair, the output power of the second motor 1 is transmitted to the second motor intermediate shaft 12 through the second motor transmission gear pair, the first motor intermediate shaft 18 is connected with the second motor intermediate shaft 12, the power is converged and transmitted to the power output shaft 30 through the 1-gear pair, meanwhile, the output power of the third motor 23 is transmitted to the power output shaft 30, and the power is output together after being converged again; the gear is used for escaping from the trouble and is used for obstacle crossing and other unconventional working conditions.
Mode 2
The first dog clutch A16 is combined on the left, the third dog clutch CU13 is disengaged, the second dog clutch B10 is combined on the left, the output power of the first motor 24 is transmitted to the first motor intermediate shaft 18 through the first motor transmission gear pair and then transmitted to the power output shaft 30 through the 1-gear pair; the output power of the second motor 1 is transmitted to a second motor intermediate shaft 12 through a second motor transmission gear pair and then transmitted to a power output shaft 30 through a 2-gear pair; the output power of the first motor 24 and the output power of the second motor 1 are coupled at the power output shaft 30, and the output power of the third motor 23 is transmitted to the power output shaft 30, and the power is converged again and then output together, which is the starting gear.
Mode 3
The first dog clutch A16 is disengaged, the second dog clutch B10 is combined on the left, the third dog clutch CU13 is combined on the left, the output power of the first motor 24 is transmitted to the first motor intermediate shaft 18 through the first motor transmission gear pair, the output power of the second motor 1 is transmitted to the second motor intermediate shaft 12 through the second motor transmission gear pair, the first motor intermediate shaft 18 is connected with the second motor intermediate shaft 12, the power is transmitted to the power output shaft 30 through the 2-gear pair after being converged, meanwhile, the output power of the third motor 23 is transmitted to the power output shaft 30, and the power is output together after being converged again.
Mode 4
The first dog clutch A16 is combined right, the second dog clutch B10 is combined left, the third dog clutch CU13 is disengaged, the output power of the first motor 24 is transmitted to the first motor intermediate shaft 18 through the first motor transmission gear pair and then transmitted to the power output shaft 30 through the 3-gear pair; the output power of the second motor 1 is transmitted to a second motor intermediate shaft 12 through a second motor transmission gear pair and then transmitted to a power output shaft 30 through a 2-gear pair; the output power of the first motor 24 and the second motor 1 is coupled at the power output shaft 30, and the output power of the third motor 23 is transmitted to the power output shaft 30, and the power is output together after being recombined.
Mode 5
The right combination of the first dog clutch A16, the disengagement of the second dog clutch B10, the left combination of the third dog clutch CU13, the output power of the first motor 24 is transmitted to the first motor intermediate shaft 18 through the first motor transmission gear pair, the output power of the second motor 1 is transmitted to the second motor intermediate shaft 12 through the second motor transmission gear pair, the first motor intermediate shaft 18 and the second motor intermediate shaft 12 are connected, the power is transmitted to the power output shaft 30 through the 3-gear pair after being converged, meanwhile, the output power of the third motor 23 is transmitted to the power output shaft 30, and the power is output together after being converged again.
Mode 6
The first dog clutch A16 is combined right, the second dog clutch B10 is combined right, the third dog clutch CU13 is disengaged, the output power of the first motor 24 is transmitted to the first motor intermediate shaft 18 through the first motor transmission gear pair and then transmitted to the power output shaft 30 through the 3-gear pair; the output power of the second motor 1 is transmitted to a second motor intermediate shaft 12 through a second motor transmission gear pair and then transmitted to a power output shaft 30 through a 4-gear pair; the output power of the first motor 24 and the second motor 1 is coupled at the power output shaft 30, and the output power of the third motor 23 is transmitted to the power output shaft 30, and the power is output together after being recombined.
Mode 7
The first dog clutch A16 is disengaged, the second dog clutch B10 is engaged on the right, the third dog clutch CU13 is engaged on the left, the output power of the first motor 24 is transmitted to the first motor intermediate shaft 18 through the first motor transmission gear pair, the output power of the second motor 1 is transmitted to the second motor intermediate shaft 12 through the second motor transmission gear pair, the first motor intermediate shaft 18 is connected with the second motor intermediate shaft 12, the power is converged and transmitted to the power output shaft 30 through the 4-gear pair, meanwhile, the output power of the third motor 23 is transmitted to the power output shaft 30, and the power is output together after being converged again, namely, the high-speed gear.
The switching process among the working modes is as follows:
selecting a mode 2 or a mode 3 to start, wherein the modes 4, 5 and 6 are conventional gears, and the mode 7 is a highest vehicle speed gear;
during the upshift, when the mode 2 is switched to the mode 3, the first dog clutch a16 is disengaged, the second motor 1 and the third motor 23 maintain power, and the third dog clutch CU13 is engaged after the speed of the first motor 24 is adjusted, thereby completing the switching from the mode 2 to the mode 3.
When the mode 3 is switched to the mode 4, the second dog clutch B10 is kept engaged, the third dog clutch CU13 is disengaged, the first dog clutch A16 returns to the neutral gear, the second motor 1 and the third motor 23 are kept driven, the first motor 24 adjusts the speed, the first dog clutch A16 is engaged to the right after the speed adjustment is finished, and the mode 3 is switched to the mode 4.
When the mode 4 is switched to the mode 5, the first dog clutch a16 is kept engaged, the second dog clutch B10 returns to the neutral gear, the first motor 24 and the third motor 23 are kept in power driving, the second motor 1 performs motor speed regulation, and after the speed regulation is completed, the third dog clutch CU13 is engaged to the left, so that the mode 4 is switched to the mode 5.
When the mode 5 is switched to the mode 6, the first dog clutch A16 is kept in right combination, the third dog clutch CU13 is disconnected, the first motor 24 and the third motor 23 are kept in power driving, the second motor 1 carries out motor speed regulation, and the second dog clutch B10 is combined right after the speed regulation is finished, so that the mode 5 is switched to the mode 6.
When the mode 6 is switched to the mode 7, the second dog clutch B10 is kept engaged, the first dog clutch A16 is disengaged, the second motor 1 and the third motor 23 are kept in power driving, the first motor 24 carries out motor speed regulation, and the third dog clutch CU13 is engaged on the left after the speed regulation is finished, so that the mode 6 is switched to the mode 7.
The downshift is performed in the same manner and in reverse.
The third motor 23 in embodiment 1 adopts a high-speed motor and planetary row combination form to meet the requirement of internal structure arrangement; the output shaft of the third motor 23 in embodiment 2 is located at the output end, and needs to bear large torque, and needs a thick output shaft, while the high-speed motor is not satisfactory, so the low-speed motor is selected.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (10)

1. An electrically driven multiple-speed transmission system for a heavy truck, comprising: the transmission system includes:
the output shaft of the first motor (24) is connected with a first motor intermediate shaft (18) through a first motor transmission gear pair;
the output shaft (2) of the second motor (1) is connected with a second motor intermediate shaft (12) through a second motor transmission gear pair;
the gear shifting device comprises a first motor intermediate shaft (18), wherein a first dog clutch A (16) is arranged on the first motor intermediate shaft (18), and a 1-gear driving gear (17) and a 3-gear driving gear (15) are respectively sleeved on two sides of the first dog clutch A (16) in a connectable mode in an empty mode;
the clutch comprises a second motor intermediate shaft (12), wherein a second dog clutch B (10) and a third dog clutch CU (13) are arranged on the second motor intermediate shaft (12), a 2-gear driving gear (11) and a 4-gear driving gear (9) are respectively sleeved on two sides of the second dog clutch B (10) in a connectable mode in an empty mode, and the third dog clutch CU (13) is arranged between the first motor intermediate shaft (18) and the second motor intermediate shaft (12) to realize connection and disconnection of the first motor intermediate shaft (18) and the second motor intermediate shaft (12);
the power output shaft (30) is fixedly connected with a 1-gear driven gear (25), a 3-gear driven gear (26), a 2-gear driven gear (28) and a 4-gear driven gear (29) respectively; the 1-gear driven gear (25) is correspondingly meshed with the 1-gear driving gear (17) to form a 1-gear pair, the 3-gear driven gear (26) is correspondingly meshed with the 3-gear driving gear (15) to form a 3-gear pair, the 2-gear driven gear (28) is correspondingly meshed with the 2-gear driving gear (11) to form a 2-gear pair, and the 4-gear driven gear (29) is correspondingly meshed with the 4-gear driving gear (9) to form a 4-gear pair;
and an output shaft of the third motor (23) is connected with the power output shaft (30).
2. An electrically driven multiple-speed transmission system according to claim 1, wherein: the 3 motors are arranged in a triangular shape on the spatial section.
3. An electrically driven multiple-speed transmission system according to claim 1 or 2, wherein: the first motor transmission gear pair comprises a first motor driving gear (27) and a first motor driven gear (14) which are meshed with each other, the first motor driving gear (27) is fixedly connected with an output shaft of the first motor (24), and the first motor driven gear (14) is fixedly connected with the first motor intermediate shaft (18).
4. An electrically driven multiple-speed transmission system according to claim 1 or 2, wherein: the second motor transmission gear pair comprises a second motor driving gear (7) and a second motor driven gear (8) which are meshed with each other, the second motor driving gear (7) is fixedly connected with an output shaft (2) of the second motor (1), and the second motor driven gear (8) is fixedly connected with a second motor intermediate shaft (12).
5. An electrically driven multiple-speed transmission system according to claim 1 or 2, wherein: the output shaft of the third motor (23) is connected with the power output shaft (30) through a planetary row; the third motor (23) is arranged on the same side as the first motor (1) and the second motor (24).
6. An electrically driven multiple-speed transmission system according to claim 5, wherein: the third motor (23) adopts a high-speed motor.
7. An electrically driven multiple-speed transmission system according to claim 5, wherein: the planet row comprises a sun wheel (22) connected with an output shaft of the third motor (23), a plurality of planet wheels (21) which are positioned on the periphery of the sun wheel (22) and can rotate around the sun wheel (22), a planet carrier (19) connected with the planet wheels (21), and a gear ring (20) which is positioned on the periphery of the planet wheels (21), rotates in a meshing manner with the planet wheels (21) and is connected with the power output shaft (30).
8. An electrically driven multiple-speed transmission system according to claim 1 or 2, wherein: the third motor (23) is arranged at the tail end of the power output shaft (30), and the third motor (23) is arranged on the opposite side of the first motor (1) and the second motor (24).
9. An electrically driven multiple speed transmission system as defined in claim 8 wherein: the third motor (23) adopts a low-speed motor.
10. An electrically driven multiple-speed transmission system according to claim 1 or 2, wherein: output shaft (2) of second motor (1) still are connected through oil pump gear pair and mechanical two-way pump (5) and power takeoff (6), oil pump gear pair includes intermeshing's oil pump driving gear (3) and oil pump driven gear (4), oil pump driving gear (3) with output shaft (2) fixed connection of second motor (1), oil pump driven gear (4) and oil pump jackshaft fixed connection.
CN202110223503.5A 2021-03-01 2021-03-01 Electrically-driven heavy truck multi-gear transmission system and control method thereof Pending CN113007291A (en)

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CN113696705A (en) * 2021-10-26 2021-11-26 凯博易控车辆科技(苏州)股份有限公司 Multi-motor speed change system

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