CN209892699U - Double planetary gear set type two-speed electric drive transmission - Google Patents

Double planetary gear set type two-speed electric drive transmission Download PDF

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Publication number
CN209892699U
CN209892699U CN201920370389.7U CN201920370389U CN209892699U CN 209892699 U CN209892699 U CN 209892699U CN 201920370389 U CN201920370389 U CN 201920370389U CN 209892699 U CN209892699 U CN 209892699U
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gear
planetary
planetary gear
transmission
differential
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CN201920370389.7U
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陈扬珑
周士建
殷渝生
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陈扬珑
周士建
殷渝生
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Abstract

A double-planetary-gear-set type two-speed electrically-driven transmission relates to the technical field of transmission machinery and solves the technical problems of unsmooth gear shifting and large kinetic energy loss of the existing transmission. The transmission comprises a transmission case, a driving motor, a reduction gear set, a first planetary gear set and a second planetary gear set; the output shaft of the driving motor is connected with the sun gear of the first planetary gear set, the inner gear ring of the first planetary gear set is fixed on the gearbox body, the planet carrier of the first planetary gear set is connected with the inner gear ring of the second planetary gear set, the gearbox body is provided with a brake for braking the sun gear of the second planetary gear set, and the planet carrier of the second planetary gear set is connected with the speed reduction gear set to output power through the speed reduction gear set. The utility model provides a derailleur is applicable to electronic or thoughtlessly move the car.

Description

Double planetary gear set type two-speed electric drive transmission
Technical Field
The utility model relates to a transmission machinery technology especially relates to a two fast technologies of driving derailleur of two planet wheel group formulas electricity.
Background
The existing hybrid or pure electric transmissions are provided with clutches, and the shifting operation is realized by operating the clutches. The mode of realizing gear shifting operation through the clutch is not smooth during gear shifting, jerking feeling is easily generated due to the difference of the rotating speeds between the gears, the gear shifting control strategy is relatively complex, the gear shifting implementation cost is high, and the kinetic energy loss is large.
SUMMERY OF THE UTILITY MODEL
To the defect that exists among the above-mentioned prior art, the utility model aims to solve the technical problem that a gear shift is smooth-going is provided, and the gear shift realizes with low costs, the two fast electronic derailleurs of two planetary gear set formulas that the kinetic energy loss is few.
In order to solve the technical problem, the utility model provides a two fast electronic derailleurs of two planet wheel group formulas, including gearbox body, driving motor, planetary wheel set, its characterized in that:
the number of the planetary wheel sets is two, wherein one planetary wheel set is a first planetary wheel set, and the other planetary wheel set is a second planetary wheel set;
an output shaft of the driving motor is connected with a sun gear of the first planetary gear set and is used for driving the sun gear of the first planetary gear set to rotate;
and the planet carrier of the second planetary gear set is connected with the speed reduction gear set, and power is output through the speed reduction gear set.
Furthermore, the diameters of the sun gears of the two planetary gear sets are different.
Further, the device also comprises a differential, wherein the reduction gear set is connected to the differential through a transmission component, and power is output through the differential.
Further, the brake is used for braking the output shaft of the differential.
The utility model provides a two fast electronic derailleurs of double planetary gear set formula, through the locking of stopper to the sun gear of second planetary gear set, the unblock, control the planetary gear set of participating in power transmission, thereby realize the transform of gear, this kind of mode that utilizes stopper control sun gear to realize the gear shift, it shifts and controls conveniently, swiftly, and there is not the pause and pause of traditional clutch when shifting gears to feel, the gear shift is very smooth-going, gearshift and gear shift control strategy are also simple than traditional clutch mode of shifting, the gear shift cost of realizing is also corresponding lower, kinetic energy loss is also less relatively.
Drawings
Fig. 1 is a schematic structural diagram of a dual planetary gearset type two-speed electrically-driven transmission according to an embodiment of the present invention.
Detailed Description
The following description is provided for further details of the embodiments of the present invention with reference to the accompanying drawings, but this embodiment is not intended to limit the present invention, and all similar structures and similar variations thereof adopted by the present invention should be included in the protection scope of the present invention.
As shown in fig. 1, the embodiment of the present invention provides a double planetary gear set type two-speed electrically driven transmission, including a transmission case x1, a driving motor t1, a planetary gear set, characterized in that:
the number of the planetary wheel sets is two, wherein one planetary wheel set is a first planetary wheel set, and the other planetary wheel set is a second planetary wheel set;
an output shaft of the driving motor t1 is connected with a sun gear s1 of the first planetary gear set and is used for driving the sun gear s1 of the first planetary gear set to rotate, an inner gear ring r1 of the first planetary gear set is fixed on a gearbox body x1, and a planet carrier p1 of the first planetary gear set is connected with an inner gear ring r2 of the second planetary gear set and is used for driving an inner gear ring r2 of the second planetary gear set to rotate;
the gearbox body x1 is provided with a speed reduction gear set d1 and a brake k1 for braking a sun gear s2 in the second planetary gear set, a planet carrier p2 of the second planetary gear set is connected with the speed reduction gear set d1, power is output through the speed reduction gear set d1, and the requirement of output torque can be met by adopting the speed reduction gear set.
The embodiment of the utility model provides an in, the sun gear diameter of two planetary gear sets is different, and the diameter of sun gear s1 of first planetary gear set is less than the diameter of sun gear s2 of second planetary gear set, the utility model discloses in other embodiments, the sun gear diameter of two planetary gear sets also can be the same.
The embodiment of the utility model provides a still include differential d2, and be used for braking differential d 2's output shaft's stopper (not shown in the figure) to ensure the braking demand on the ramp, reduction gear group d1 is connected to differential d2 through the drive disk assembly, through differential output power.
The embodiment of the utility model provides an in, the stopper is prior art, can adopt current disc brake, caliper brake etc to adopt disc brake as an example, can fix the braking piece of disc brake on the sun gear of second planetary gear set, fix the brake disc of disc brake on gearbox housing, just so can be as good as required carry out the braking or release to the sun gear of second planetary gear set.
The embodiment of the utility model provides a, be applicable to electronic or thoughtlessly move the car, can realize two grades of outputs, its theory of operation as follows:
the first gear output is suitable for the working condition of low-speed starting or reversing, large torque output is required under the working condition (low-speed range gear ratio is used), at the moment, the brake k1 is controlled to lock the sun gear s2 in the second planetary gear set, at the moment, the power output by the driving motor t1 is transmitted to the inner gear ring r2 of the second planetary gear set through the sun gear s1 and the planet carrier p1 of the first planetary gear set in sequence, then transmitted to the differential d2 through the planet carrier p2 and the reduction gear set d1 of the second planetary gear set, and power is output through the differential d2, and in the situation, the sun gear s2 in the second planetary gear set is locked, so that the two planetary gear sets participate in power transmission together, and the output of low rotating speed and large torque can be realized.
The second gear output is suitable for high-speed running or low-torque demand working conditions, at this time, the control brake k1 unlocks the sun gear s2 in the second planetary gear set, at this time, the power output by the driving motor t1 is transmitted to the ring gear r2 of the second planetary gear set through the sun gear s1 and the planet carrier p1 of the first planetary gear set in sequence, then is transmitted to the differential d2 through the planet carrier p2 and the reduction gear set d1 of the second planetary gear set, and the power is output through the differential d2, so that the second planetary gear set is in a neutral state because the sun gear s2, the ring gear r2 and the planet carrier p2 in the second planetary gear set are not locked, and only the first planetary gear set participates in power transmission (but is still output by the planet carrier p2 of the second planetary gear set), and high-speed and low-torque output can be realized.

Claims (4)

1. The utility model provides a two fast electrically driven derailleurs of double planet wheel group formula, includes gearbox body, driving motor, planet wheelset, its characterized in that:
the number of the planetary wheel sets is two, wherein one planetary wheel set is a first planetary wheel set, and the other planetary wheel set is a second planetary wheel set;
an output shaft of the driving motor is connected with a sun gear of the first planetary gear set and is used for driving the sun gear of the first planetary gear set to rotate;
and the planet carrier of the second planetary gear set is connected with the speed reduction gear set, and power is output through the speed reduction gear set.
2. The twin planetary gearset two speed electrically driven transmission of claim 1, wherein: the sun gears of the two planetary gear sets have different diameters.
3. The twin planetary gearset two speed electrically driven transmission of claim 1, wherein: the power transmission device further comprises a differential, wherein the reduction gear set is connected to the differential through a transmission component and outputs power through the differential.
4. The twin planetary gearset two speed electrically driven transmission of claim 3, wherein: a brake for braking the output shaft of the differential is also included.
CN201920370389.7U 2019-03-22 2019-03-22 Double planetary gear set type two-speed electric drive transmission Active CN209892699U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920370389.7U CN209892699U (en) 2019-03-22 2019-03-22 Double planetary gear set type two-speed electric drive transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920370389.7U CN209892699U (en) 2019-03-22 2019-03-22 Double planetary gear set type two-speed electric drive transmission

Publications (1)

Publication Number Publication Date
CN209892699U true CN209892699U (en) 2020-01-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920370389.7U Active CN209892699U (en) 2019-03-22 2019-03-22 Double planetary gear set type two-speed electric drive transmission

Country Status (1)

Country Link
CN (1) CN209892699U (en)

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