CN115059740A - Pure electric 2/3 speed single planetary gear transmission case - Google Patents

Pure electric 2/3 speed single planetary gear transmission case Download PDF

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Publication number
CN115059740A
CN115059740A CN202210475376.2A CN202210475376A CN115059740A CN 115059740 A CN115059740 A CN 115059740A CN 202210475376 A CN202210475376 A CN 202210475376A CN 115059740 A CN115059740 A CN 115059740A
Authority
CN
China
Prior art keywords
gear
driving motor
brake
planetary
planetary gear
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
CN202210475376.2A
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Chinese (zh)
Inventor
陈扬珑
周士建
刘智慧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Meihua Automobile Technology Co ltd
Original Assignee
Shanghai Meihua Automobile Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Meihua Automobile Technology Co ltd filed Critical Shanghai Meihua Automobile Technology Co ltd
Priority to CN202210475376.2A priority Critical patent/CN115059740A/en
Publication of CN115059740A publication Critical patent/CN115059740A/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
    • F16H3/44—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
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • 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
    • F16H57/037—Gearboxes for accommodating differential gearings
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • 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
    • 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
    • F16H2200/0034—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising two forward speeds
    • 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
    • F16H2200/0039—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising three forward speeds

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Structure Of Transmissions (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention discloses a pure electric 2/3-speed single-planetary-gear gearbox which comprises a first driving motor, a second driving motor, a first brake, a second brake, a planetary gear mechanism and a reduction gear set, wherein the planetary gear mechanism comprises a sun gear, a planetary support and an inner gear ring, the inner gear ring is connected with an output shaft of the first driving motor, the sun gear is connected with an output shaft of the second driving motor, the planetary support is connected with the reduction gear set, the first brake is used for braking the inner gear ring, and the second brake is used for braking an output shaft of the second driving motor.

Description

Pure electric 2/3 speed single planetary gear transmission case
Technical Field
The invention belongs to the technical field of transmissions, and particularly relates to a pure electric 2/3-speed single planetary gear transmission.
Background
In the prior art, a two-speed gearbox combined by double motors is actually two single speed reduction gear boxes with different speed ratios, so the structure is complicated, and the volume, the weight and the cost are high.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, the present invention provides a purely electric 2/3 speed single planetary gear transmission.
In order to achieve the purpose, the invention adopts the technical scheme that: pure electric 2/3 speed single-planetary gear gearbox, including first driving motor, second driving motor, first brake, second brake, planetary gear mechanism and reduction gear set, planetary gear mechanism includes sun gear, planet carrier and inner ring gear, and the ring gear is connected with the output shaft of first driving motor, and the sun gear is connected with the output shaft of second driving motor, and the planet carrier is connected with the reduction gear set, and first brake is constructed for braking the ring gear, and the second brake is constructed for braking the output shaft of second driving motor.
When the first gear is in the first gear, the first brake brakes the inner gear ring, the second driving motor operates, and power generated by the second driving motor is transmitted to the reduction gear set through the sun gear, the planetary gear and the planetary support in sequence.
And when the sun gear is in the second gear, the second brake brakes the sun gear, the first driving motor operates, and power generated by the first driving motor is transmitted to the reduction gear set through the inner gear ring, the planetary gear and the planetary support in sequence.
And in the third gear, the first driving motor and the second driving motor operate, and the first brake are in a released free sliding state. The power generated by the first drive motor and the second drive motor is transmitted to the reduction gear set through the planetary gear mechanism.
The reduction gear set comprises a first reduction mechanism connected with the planet carrier and a second reduction mechanism connected with the first reduction mechanism, and the second reduction mechanism is connected with the differential mechanism.
The pure electric 2/3 speed single planetary gear transmission case has the advantages that the volume, the weight and the cost can be reduced, and the requirements on higher speed and higher motor efficiency can be more easily met than the requirements on a common two-speed transmission case.
Drawings
The description includes the following figures, the contents shown are respectively:
FIG. 1 is a schematic diagram of the pure electric 2/3 speed single planetary gear transmission of the present invention;
FIG. 2a is a single planet lever diagram for first gear;
FIG. 2b is a single planet lever diagram in second gear;
FIG. 2c is a single planet lever diagram for third gear;
labeled as: 1. a first drive motor; 2. a second drive motor; 3. a sun gear; 4. a planetary gear; 5. a planet carrier; 6. an inner gear ring; 7. a first drive gear; 8. a first driven gear; 9. a second driving gear; 10. a second driven gear; 11. a differential mechanism; b1, a first brake; b2, a second brake.
Detailed Description
The following detailed description of the embodiments of the present invention is provided to help those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to help them implement it by referring to the accompanying drawings and the description of the embodiments.
As shown in fig. 1, the present invention provides a pure electric 2/3 speed single planetary gear transmission, including a first driving motor 1, a second driving motor 2, a first brake B1, a second brake B2, a planetary gear mechanism and a reduction gear set, the planetary gear mechanism being located between the first driving motor 1 and the second driving motor 2, the planetary gear mechanism including a sun gear 3, a planetary gear 4, a planet carrier 5 and a ring gear 6, the ring gear 6 being connected with an output shaft of the first driving motor 1, the sun gear 3 being connected with an output shaft of the second driving motor 2, the planet carrier 5 being connected with the reduction gear set, the first brake B1 being configured to brake the ring gear 6, the second brake B2 being configured to brake an output shaft of the second driving motor 2.
Specifically, as shown in fig. 1, the first driving motor 1 and the second driving motor 2 are coaxially arranged, the first brake B1 and the second brake B2 are arranged on the housing of the transmission, the ring gear 6 is coaxially and fixedly connected with the output shaft of the first driving motor 1, the sun gear 3 is coaxially and fixedly connected with the output shaft of the second driving motor 2, the planet gears 4 are rotatably arranged on the planet carrier 5, all the planet gears 4 are uniformly distributed around the sun gear 3 along the circumferential direction, and the planet gears 4 are engaged with the sun gear 3 and the ring gear 6.
As shown in fig. 1, the reduction gear set includes a first reduction mechanism connected to the planet carrier 5 and a second reduction mechanism connected to the first reduction mechanism, and the second reduction mechanism is connected to the differential 11. The first speed reducing mechanism comprises a first driving gear 7 fixedly connected with the planet support 5 and a first driven gear 8 meshed with the first driving gear 7, the second speed reducing mechanism comprises a second driving gear 9 and a second driven gear 10 meshed with the second driving gear 9, the second driving gear 9 and the first driven gear 8 are coaxially and fixedly connected, and the second driven gear 10 and the differential mechanism 11 are fixedly connected.
As shown in fig. 1 and 2a, in the first gear (forward or reverse), the first brake B1 is activated, the first brake B1 brakes the ring gear 6, the ring gear 6 cannot rotate, only the second driving motor 2 is activated, the second driving motor 2 operates, the power generated by the second driving motor 2 is transmitted to the reduction gear set through the sun gear 3, the planetary gears 4 and the planetary carrier 5 in sequence, and finally the differential 11 outputs the power.
As shown in fig. 1 and 2a, in first gear, the transmission ratio is T/R1 ═ sun gear tooth count + inner gear tooth count/sun gear tooth count.
As shown in fig. 1 and 2B, in the second gear (forward gear), the first brake B1 is released, the second brake B2 is activated, the second brake B2 brakes the output shaft of the second driving motor 2, i.e. brakes the sun gear 3, the sun gear 3 cannot rotate, only the first driving motor 1 is activated, the first driving motor 1 operates, the power generated by the first driving motor 1 is transmitted to the reduction gear set through the ring gear 6, the planetary gears 4 and the planet carrier 5 in sequence, and finally the differential 11 outputs the power.
As shown in fig. 1 and 2b, in second gear, the transmission ratio is T/R2 ═ sun gear tooth count + inner gear tooth count)/inner gear tooth count.
As shown in fig. 1 and 2c, in the third gear (forward), the first brake B1 and the second brake B2 are released simultaneously, and then the first driving motor 1 and the second driving motor 2 are started simultaneously, the first driving motor 1 and the second driving motor 2 are operated, according to the operation principle of a single planetary gear: when a gear set has two input flows (to different gear members such as the sun gear 3 and the ring gear 6) at the same time, and another gear member (such as the planet carrier 5) is used as an output, the whole planetary gear set is in a combined rolling state, so that the input and the output of the power flow are combined into a whole, namely the speed ratio is: T/R3 is 1.0. Therefore, the power generated by the first drive motor 1 and the second drive motor 2 is transmitted to the reduction gear set via the planetary gear mechanism, and finally the power is output by the differential 11.
In neutral (N), the first brake B1 and the second brake B2 are released simultaneously, while both motors are at rest or idle (while the tackle is in place).
When the third gear returns to the second gear (or directly to the first gear), or the second gear returns to the first gear, the operation can be performed automatically or manually according to the control requirements of the above gears.
The smoothness of the gear shifting depends on the strategy and function of the control system, the speed regulation reaction of the motor, the function of the vehicle-making system and the like.
In order to avoid severe shift shocks, the gear ratios TR1/TR2 and TR2/TR3 are conventionally less than or equal to 2.0.
The invention is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the invention are not limited in this respect. Any of various non-substantial improvements made by the method concept and technical scheme of the present invention; the above idea and technical solution of the present invention can be directly applied to other occasions without modification, and all of them are within the protection scope of the present invention.

Claims (5)

1. Pure electronic 2/3 speed single planetary gear gearbox, its characterized in that: the planetary gear mechanism comprises a sun gear, a planetary support and an inner gear ring, the inner gear ring is connected with an output shaft of the first driving motor, the sun gear is connected with an output shaft of the second driving motor, the planetary support is connected with the reduction gear set, the first brake is used for braking the inner gear ring, and the second brake is used for braking an output shaft of the second driving motor.
2. The purely electric 2/3-speed single planetary gear transmission as claimed in claim 1, wherein: when the first gear is in the first gear, the first brake brakes the inner gear ring, the second driving motor operates, and power generated by the second driving motor is transmitted to the reduction gear set through the sun gear, the planetary gear and the planetary support in sequence.
3. The purely electric 2/3-speed single planetary gear transmission as claimed in claim 1, wherein: and when the sun gear is in the second gear, the second brake brakes the sun gear, the first driving motor operates, and power generated by the first driving motor is transmitted to the reduction gear set through the inner gear ring, the planetary gear and the planetary support in sequence.
4. The purely electric 2/3-speed single planetary gear transmission as claimed in claim 1, wherein: and in the third gear, the first driving motor and the second driving motor operate, the power generated by the first driving motor and the second driving motor is transmitted to the reduction gear set through the planetary gear mechanism, and the first brake are in a released free sliding state.
5. The pure electric 2/3 speed single planetary gear transmission, according to any one of claims 1-4, wherein: the speed reduction gear set comprises a first speed reduction mechanism connected with the planet carrier and a second speed reduction mechanism connected with the first speed reduction mechanism, and the second speed reduction mechanism is connected with the differential mechanism.
CN202210475376.2A 2022-04-29 2022-04-29 Pure electric 2/3 speed single planetary gear transmission case Pending CN115059740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210475376.2A CN115059740A (en) 2022-04-29 2022-04-29 Pure electric 2/3 speed single planetary gear transmission case

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210475376.2A CN115059740A (en) 2022-04-29 2022-04-29 Pure electric 2/3 speed single planetary gear transmission case

Publications (1)

Publication Number Publication Date
CN115059740A true CN115059740A (en) 2022-09-16

Family

ID=83196558

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210475376.2A Pending CN115059740A (en) 2022-04-29 2022-04-29 Pure electric 2/3 speed single planetary gear transmission case

Country Status (1)

Country Link
CN (1) CN115059740A (en)

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