CN111365426A - Electric drive four-gear speed changer - Google Patents

Electric drive four-gear speed changer Download PDF

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Publication number
CN111365426A
CN111365426A CN202010193361.8A CN202010193361A CN111365426A CN 111365426 A CN111365426 A CN 111365426A CN 202010193361 A CN202010193361 A CN 202010193361A CN 111365426 A CN111365426 A CN 111365426A
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CN
China
Prior art keywords
gear
intermediate shaft
shaft
input shaft
transmission
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
CN202010193361.8A
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Chinese (zh)
Inventor
耿毓巍
梁志海
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Getec Vehicle Technology Suzhou Co ltd
Original Assignee
Getec Vehicle Technology Suzhou Co ltd
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Publication date
Application filed by Getec Vehicle Technology Suzhou Co ltd filed Critical Getec Vehicle Technology Suzhou Co ltd
Priority to CN202010193361.8A priority Critical patent/CN111365426A/en
Publication of CN111365426A publication Critical patent/CN111365426A/en
Pending legal-status Critical Current

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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
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/20—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear
    • F16H3/22—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially
    • F16H3/24—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially with driving and driven shafts coaxial
    • F16H3/26—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially with driving and driven shafts coaxial and two or more additional shafts
    • 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
    • B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
    • B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical 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
    • 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
    • B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
    • B60K17/165—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing provided between independent half axles
    • 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
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • 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
    • 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
    • F16H61/0403—Synchronisation before shifting
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/34—Locking or disabling mechanisms
    • F16H63/3416—Parking lock mechanisms or brakes in the transmission
    • F16H63/3425—Parking lock mechanisms or brakes in the transmission characterised by pawls or wheels
    • 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
    • F16H61/0403—Synchronisation before shifting
    • F16H2061/0422—Synchronisation before shifting by an electric machine, e.g. by accelerating or braking the input shaft
    • 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
    • F16H2061/326—Actuators for range selection, i.e. actuators for controlling the range selector or the manual range valve in the transmission
    • 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
    • F16H2200/0043—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising four forward speeds

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Structure Of Transmissions (AREA)

Abstract

The invention discloses an electrically-driven four-gear transmission, which comprises an input shaft, wherein the input shaft is sleeved on a differential half shaft in a hollow manner, a motor is fixedly arranged on the input shaft, and the central axes of the motor, the input shaft and the differential half shaft are coaxial; the two sides of the input shaft are provided with an intermediate shaft I and an intermediate shaft II which are arranged in a symmetrical structure and are parallel to the input shaft I for receiving power transmitted by the input shaft I, a differential is arranged between the intermediate shaft I and the intermediate shaft II, the intermediate shaft I is in transmission connection with the input shaft and the differential through an odd transmission set, and the intermediate shaft II is in transmission connection with the input shaft and the differential through an even transmission set. The invention has the following beneficial effects: the output shaft of the differential is arranged coaxially with the input shaft, the longitudinal dimension of the transmission is reduced, and the overall rigidity is ensured by combining the support of a bearing arranged inside a transmission shell, and meanwhile, odd gears and even gears can be alternately combined and separated under the matching of a synchronizer so as to avoid the phenomenon of power interruption in the gear shifting process.

Description

Electric drive four-gear speed changer
Technical Field
The invention relates to the technical field of automobiles, in particular to an electric drive four-gear transmission.
Background
The transmission is the core of an automobile power assembly, and has a plurality of internal components and a complex structure. In a pure electric vehicle transmission system, a transmission with a fixed speed ratio is mostly used for speed reduction and torque increase, so that the requirement on a pure electric vehicle driving motor is very high, the development cost of the whole vehicle is greatly increased, more driving motors cannot run in a high-efficiency area, and the driving range of the pure electric vehicle is reduced. The four-gear transmission is a reasonable pure electric vehicle transmission system found by parameter matching of the pure electric vehicle power transmission system. Four-gear transmissions developed on pure electric vehicles at present mainly comprise a mechanical Manual Transmission (MT), an Automatic Mechanical Transmission (AMT) and a double-clutch automatic transmission (DCT).
A four-gear hybrid transmission in the prior art is realized by adding a driving motor on the existing transmission on the premise of minimum change of the existing transmission. However, this type of hybrid transmission has problems that (1) gears are orderly arranged on the input shaft due to position limitations of the differential, the input shaft, etc. and an improper arrangement of the transmission mechanism, which easily causes a power interruption phenomenon during gear shifting, and affects normal driving of the vehicle. (2) The differential assembly and the motor output shaft are arranged in parallel at intervals, so that the mechanism arrangement of the electric automobile with a compact structure is greatly disturbed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an electrically-driven four-gear speed changer.
The purpose of the invention is realized by the following technical scheme:
an electrically-driven four-gear transmission comprises an input shaft which is sleeved on a differential half shaft in an empty mode, wherein a motor is fixedly arranged on the input shaft, and the central axes of the motor, the input shaft and the differential half shaft are coaxial; the transmission mechanism is characterized in that an intermediate shaft I and an intermediate shaft II which are arranged in a symmetrical structure and are parallel to the input shaft for receiving power transmitted by the input shaft are arranged on two sides of the input shaft, a differential is arranged between the intermediate shaft I and the intermediate shaft II, the intermediate shaft I is in transmission connection with the input shaft and the differential through an odd transmission set, and the intermediate shaft II is in transmission connection with the input shaft and the differential through an even transmission set.
Preferably, a motor is further fixedly arranged on the input shaft, the motor comprises a rotor and a stator, and the rotor is fixedly connected with the input shaft.
Preferably, the distance between the intermediate shaft I and the intermediate shaft II corresponds to the height of the electric machine.
Preferably, the odd transmission set comprises a first gear and a third gear which are sleeved on the intermediate shaft I in a hollow manner, and the first gear and the third gear are respectively meshed with a connecting gear fixedly arranged on the differential and a main reduction gear of the differential; and a third synchronizer arranged on the intermediate shaft I is also arranged between the first-gear and the third-gear, and the third synchronizer can be selectively meshed with the first-gear or the third-gear.
Preferably, the even transmission set comprises a second gear and a fourth gear which are sleeved on the intermediate shaft II in a hollow manner, and the second gear and the fourth gear are respectively meshed with the connected gear and the main reduction gear; two or four synchronizers arranged on the intermediate shaft II are further arranged between the two-gear and the four-gear, and the two or four synchronizers can be selectively meshed with the two-gear or the four-gear.
Preferably, a driving wheel is fixedly arranged on the input shaft, and the driving wheel is meshed with a driven wheel I fixedly arranged on the intermediate shaft I and a driven wheel II fixedly arranged on the intermediate shaft II.
Preferably, a parking ratchet wheel is fixedly arranged on the differential.
Preferably, the odd transmission set comprises a first gear and a third gear which are sleeved on the intermediate shaft I in a hollow manner, and the first gear and the third gear are respectively meshed with a driven gear I and a driven gear II which are fixedly arranged on the input shaft; a third synchronizer arranged on the intermediate shaft I is further arranged between the first-gear and the third-gear, and the third synchronizer can be selectively meshed with the first-gear or the third-gear; and a driving wheel I is fixedly arranged on the intermediate shaft I and is meshed with a main reduction gear of the differential mechanism.
Preferably, the even number transmission set comprises a second gear and a fourth gear which are sleeved on the intermediate shaft II in a hollow manner, and the second gear and the fourth gear are respectively meshed with a driven gear I and a driven gear II which are fixedly arranged on the input shaft; two or four synchronizers arranged on the intermediate shaft II are further arranged between the two-gear and the four-gear, and the two or four synchronizers can be selectively meshed with the two-gear or the four-gear; and a driving wheel II is fixedly arranged on the intermediate shaft II and is meshed with a main reduction gear of the differential mechanism.
Preferably, a parking ratchet wheel is fixedly arranged on the intermediate shaft I.
The invention has the following beneficial effects:
1. the three-shaft type transmission is arranged, so that the axial space is reduced, the smaller space requirement is provided for the transmission on the premise of the same bearing requirement, and the transmission is suitable for wider vehicle types;
2. the output shaft and the input shaft of the differential are coaxially arranged, so that the longitudinal size of the transmission is reduced, the mass is reduced, the energy consumption is reduced, and the integral rigidity is ensured by combining the support of a bearing arranged in the transmission shell;
3. a clutch is cancelled, and the transmission is not controlled by the clutch, so that the enterprise cost is greatly reduced;
4. the bending deformation of the intermediate shaft, the output shaft and the input shaft in the transmission is well controlled, the feasibility is provided for providing larger bearing capacity under the same space requirement, and the bearing capacity can be improved;
5. the odd gears and the even gears can be alternately engaged and disengaged under the cooperation of the synchronizer to avoid a power interruption phenomenon during gear shifting. When two continuous gears are odd gears or even gears, the two continuous gears cannot be pre-combined, and the pre-combination and combination states are controlled by the TCU;
6. by adopting a double-intermediate-shaft structure, the gear number is more reasonable in proportion, better power performance and economic indexes can be obtained, and the oil consumption is reduced;
7. the symmetrical structure is arranged, the structure is more compact, the weight is light, the size is small, and the whole vehicle carrying is facilitated.
Drawings
The technical scheme of the invention is further explained by combining the accompanying drawings as follows:
FIG. 1: the structure of the first embodiment of the invention is shown schematically;
FIG. 2: the structure of the second embodiment of the present invention is schematically illustrated.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art in light of these embodiments are intended to be within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, the present invention discloses an electric drive four-gear transmission, which includes an input shaft 1, a motor 12 is fixedly disposed on the input shaft 1, the motor 12 includes a rotor 121 and a stator 122, and the rotor 121 is fixedly connected to the input shaft 1 for driving the input shaft 1 to rotate. In the above, the input shaft 1 is a hollow input shaft, and is freely sleeved on the differential half shaft 41, and the central axes of the input shaft 1, the motor 12 and the differential half shaft 41 are coaxial, so that the design reduces the longitudinal size of the transmission, reduces the mass, reduces the energy consumption, and ensures the integral rigidity by combining the support of the bearing arranged in the transmission shell. In addition, the motor 12 is directly used for driving, the starting response is fast, and the acceleration performance is greatly improved. Furthermore, the distance between the intermediate shaft I2 and the intermediate shaft II3 is equal to the height of the motor 12, so that the longitudinal size of the transmission is further ensured, the mechanism arrangement of the electric automobile is facilitated, the structure is more compact, the size is small, and the whole automobile carrying is facilitated.
In the invention, the intermediate shaft I2 is in transmission connection with the input shaft 1 and the differential 4 through an odd transmission set, and the intermediate shaft II3 is in transmission connection with the input shaft 1 and the differential 4 through an even transmission set. In the structure, the odd gears and the even gears can be alternately combined and separated under the matching of the synchronizer, so that the power interruption phenomenon in the gear shifting process is avoided. When two continuous gears are odd gears or even gears, the two continuous gears cannot be pre-combined, and the pre-combination and combination states are controlled through the TCU.
As shown in fig. 1, in the first embodiment of the present invention, specifically, the odd-numbered transmission set includes a first-gear 21 and a third-gear 22 that are freely sleeved on the intermediate shaft I2, and the first-gear 21 and the third-gear 22 are respectively engaged with a connecting gear 43 fixed to the differential 4 and a main reduction gear 44 of the differential 4. A third synchronizer 23 arranged on the intermediate shaft I2 is also arranged between the first gear 21 and the third gear 22, and the third synchronizer 23 can be selectively meshed with the first gear 21 or the third gear 22.
The even transmission set comprises a second gear 31 and a fourth gear 32 which are sleeved on the intermediate shaft II3 in an empty mode, and the second gear 31 and the fourth gear 32 are respectively meshed with the connecting gear 43 and the main reduction gear 44; a second synchronizer 33 and a fourth synchronizer 33 which are arranged on the intermediate shaft II3 are further arranged between the second gear 31 and the fourth gear 32, and the second synchronizer 33 can be selectively meshed with the second gear 31 or the fourth gear 32.
A driving wheel 13 is fixedly arranged on the input shaft 1, and the driving wheel 13 is meshed with a driven wheel I24 fixedly arranged on the intermediate shaft I2 and a driven wheel II34 fixedly arranged on the intermediate shaft II 3.
In this embodiment, a structure of P-gear parking is also disclosed, in which a parking ratchet 5 is fixedly disposed on the differential 4, when the present invention needs to park: the parking pawl is driven through the push rod assembly, and then the parking pawl is matched with the parking ratchet wheel 5, so that parking is achieved.
As will be described below, in the operation of the first embodiment of the present invention, when the vehicle requires a first gear output, a third synchronizer 23 couples the first gear 21 with the intermediate shaft I2 so that the motor transmits torque to the differential via the input shaft, the driving pulley 13, the driven pulley I24, the intermediate shaft I2, the third synchronizer 23, the first gear 21 and the connecting gear 43 in this order. When the automobile needs to output in the second gear, the third gear and the fourth gear, the working process is similar to that of the first gear, and therefore, redundant description is not repeated here.
As shown in fig. 2, in a second embodiment of the present invention, specifically, the odd-numbered transmission set includes a first-gear 21 and a third-gear 22 that are freely sleeved on the intermediate shaft I2, and the first-gear 21 and the third-gear 22 are respectively engaged with a driven gear I13 and a driven gear II14 that are fixedly arranged on the input shaft 1. A third synchronizer 23 arranged on the intermediate shaft I2 is also arranged between the first gear 21 and the third gear 22, and the third synchronizer 23 can be selectively meshed with the first gear 21 or the third gear 22. A driving wheel I25 is fixedly arranged on the intermediate shaft I2, and the driving wheel I25 is meshed with the main reduction gear 44 of the differential 4.
The even transmission set comprises a second gear 31 and a fourth gear 32 which are sleeved on the intermediate shaft II3 in an empty mode, and the second gear 31 and the fourth gear 32 are respectively meshed with a driven gear I13 and a driven gear II14 which are fixedly arranged on the input shaft 1. A second synchronizer 33 and a fourth synchronizer 33 which are arranged on the intermediate shaft II3 are further arranged between the second gear 31 and the fourth gear 32, and the second synchronizer 33 can be selectively meshed with the second gear 31 or the fourth gear 32. A driving wheel II35 is fixedly arranged on the intermediate shaft II3, and the driving wheel II35 is meshed with the main reduction gear 44 of the differential 4.
In the embodiment, a structure of P-gear parking is also disclosed, and a parking ratchet wheel 5 is fixedly arranged on the intermediate shaft I2. When the invention needs to park: the parking pawl is driven through the push rod assembly, and then the parking pawl is matched with the parking ratchet wheel 5, so that parking is achieved. Of course, the parking ratchet 5 may also be provided on the intermediate shaft II 3.
In the operation of the second embodiment of the present invention, when the vehicle needs a first gear output, a third synchronizer 23 couples the first gear 21 with the intermediate shaft I2, so that the motor transmits torque to the differential via the input shaft, the driven gear I13, the first gear 21, the third synchronizer 23, the intermediate shaft I2, the driving wheel I25 and the final reduction gear 44 in this order. When the automobile needs to output in the second gear, the third gear and the fourth gear, the working process is similar to that of the first gear, and therefore, redundant description is not repeated here.
The four-gear transmission can be suitable for front and rear axle systems, and a pure electric drive mode is realized. Of course, the hybrid electric vehicle can also be used in combination with an engine to realize a hybrid mode, so that the hybrid electric vehicle is formed. The above application modes are all within the protection scope of the present invention and are not specifically limited.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (10)

1. The electric drive four-gear transmission is characterized in that: the device comprises an input shaft (1) which is sleeved on a differential half shaft (41) in an empty mode, wherein a motor (12) is fixedly arranged on the input shaft (1), and the central axes of the motor (12), the input shaft (1) and the differential half shaft (41) are coaxial; the double-shaft transmission mechanism is characterized in that an intermediate shaft I (2) and an intermediate shaft II (3) which are arranged in a symmetrical structure and parallel to the intermediate shaft I (2) for receiving power transmitted by the input shaft I (1) are arranged on two sides of the input shaft (1), a differential mechanism (4) is arranged between the intermediate shaft I (2) and the intermediate shaft II (3), the intermediate shaft I (2) is in transmission connection with the input shaft (1) and the differential mechanism (4) through an odd transmission set, and the intermediate shaft II (3) is in transmission connection with the input shaft (1) and the differential mechanism (4) through an even transmission set.
2. The electrically driven four speed transmission of claim 1, wherein: the input shaft (1) is further fixedly provided with a motor (12), the motor (12) comprises a rotor (121) and a stator (122), and the rotor (121) is fixedly connected with the input shaft (1).
3. The electrically driven four speed transmission of claim 2, wherein: the distance between the intermediate shaft I (2) and the intermediate shaft II (3) corresponds to the height of the motor (12).
4. The electrically driven four speed transmission of claim 1, wherein: the odd transmission set comprises a first gear (21) and a third gear (22) which are sleeved on the intermediate shaft I (2) in an empty mode, and the first gear (21) and the third gear (22) are respectively meshed with a connecting gear (43) fixedly arranged on the differential (4) and a main reduction gear (44) of the differential (4); a third synchronizer (23) arranged on the intermediate shaft I (2) is further arranged between the first-gear (21) and the third-gear (22), and the third synchronizer (23) can be selectively meshed with the first-gear (21) or the third-gear (22).
5. The electric drive four speed transmission of claim 4, wherein: the even transmission set comprises a second gear (31) and a fourth gear (32) which are sleeved on the intermediate shaft II (3) in a hollow manner, and the second gear (31) and the fourth gear (32) are respectively meshed with the connected gear (43) and the main reduction gear (44); and a second synchronizer (33) and a fourth synchronizer (33) which are arranged on the intermediate shaft II (3) are further arranged between the second gear (31) and the fourth gear (32), and the second synchronizer (33) and the fourth synchronizer (33) can be selectively meshed with the second gear (31) or the fourth gear (32).
6. The electric drive four speed transmission of claim 5, wherein: and a driving wheel (13) is fixedly arranged on the input shaft (1), and the driving wheel (13) is meshed with a driven wheel I (24) fixedly arranged on the intermediate shaft I (2) and a driven wheel II (34) fixedly arranged on the intermediate shaft II (3).
7. The electric drive four speed transmission of claim 6, wherein: and a parking ratchet wheel (5) is fixedly arranged on the differential (4).
8. The electrically driven four speed transmission of claim 1, wherein: the odd transmission set comprises a first gear (21) and a third gear (22) which are sleeved on the intermediate shaft I (2) in an empty mode, and the first gear (21) and the third gear (22) are respectively meshed with a driven gear I (13) and a driven gear II (14) which are fixedly arranged on the input shaft (1); a third synchronizer (23) arranged on the intermediate shaft I (2) is further arranged between the first-gear (21) and the third-gear (22), and the third synchronizer (23) can be selectively meshed with the first-gear (21) or the third-gear (22); a driving wheel I (25) is fixedly arranged on the intermediate shaft I (2), and the driving wheel I (25) is meshed with a main reduction gear (44) of the differential (4).
9. The electrically driven four speed transmission of claim 8, wherein: the even transmission set comprises a second gear (31) and a fourth gear (32) which are sleeved on the intermediate shaft II (3) in a hollow manner, and the second gear (31) and the fourth gear (32) are respectively meshed with a driven gear I (13) and a driven gear II (14) which are fixedly arranged on the input shaft (1); a second synchronizer (33) and a fourth synchronizer (33) which are arranged on the intermediate shaft II (3) are further arranged between the second gear (31) and the fourth gear (32), and the second synchronizer (33) can be selectively meshed with the second gear (31) or the fourth gear (32); and a driving wheel II (35) is fixedly arranged on the intermediate shaft II (3), and the driving wheel II (35) is meshed with the main reduction gear (44).
10. The electrically driven four speed transmission of claim 9, wherein: and a parking ratchet wheel (5) is fixedly arranged on the intermediate shaft I (2).
CN202010193361.8A 2020-03-18 2020-03-18 Electric drive four-gear speed changer Pending CN111365426A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010193361.8A CN111365426A (en) 2020-03-18 2020-03-18 Electric drive four-gear speed changer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010193361.8A CN111365426A (en) 2020-03-18 2020-03-18 Electric drive four-gear speed changer

Publications (1)

Publication Number Publication Date
CN111365426A true CN111365426A (en) 2020-07-03

Family

ID=71204618

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010193361.8A Pending CN111365426A (en) 2020-03-18 2020-03-18 Electric drive four-gear speed changer

Country Status (1)

Country Link
CN (1) CN111365426A (en)

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