CN202017736U

CN202017736U - Planet gear type automatic speed change system for electric automobile

Info

Publication number: CN202017736U
Application number: CN2011201279201U
Authority: CN
Inventors: 林程; 孙逢春; 朱成; 杨晓昆
Original assignee: BIT HUACHUANG ELECTRIC VEHICLE TECHNOLOGY Co Ltd
Current assignee: BIT HUACHUANG ELECTRIC VEHICLE TECHNOLOGY Co Ltd
Priority date: 2011-04-27
Filing date: 2011-04-27
Publication date: 2011-10-26
Anticipated expiration: 2021-04-27

Abstract

The utility model relates to a planet gear type automatic speed change system for an electric automobile. The automatic speed change system comprises a front planet row, a rear planet row and an input shaft; a sun gear at the front end of the input shaft is in engaged connection with a first planet gear and a second planet gear, the first planet gear and the second planet gear are in engaged connection with a first gear ring respectively, a first clutch is arranged between a first planet carrier and the first gear ring, and a first brake is arranged on the first gear ring; the first planet carrier is in engaged connection with a third planet gear and a fourth planet gear, and the third planet gear and the fourth planet gear are in engaged connection with a second gear ring respectively; and a second clutch is arranged between a second planet carrier and the second gear ring, a second brake is arranged on the second gear ring, and the second planet carrier is connected with an output shaft. The automatic speed change system has the advantages of simple and compact structure, small volume and weight and high transmission efficiency, and has the advantages of saving the link of motor speed regulation, shortening the gear shifting time, improving the gear shifting quality and according with the lightweight principle of automobiles.

Description

A kind of used for electric vehicle planetary gear type automatic speed-changing system

Technical field

The utility model relates to a kind of used for electric vehicle planetary gear type automatic speed-changing system.

Background technique

At present, the especially electronic bus of electric vehicle begins to enter the industrialization stage in China, because drive motor can not satisfy the requirement of electric vehicle while about the high speed of a motor vehicle and high grade climbing performance simultaneously, so gearbox can't be substituted.Mechanical automatic gearbox is because its transmission efficiency height, simple in structure, the characteristics that cost is low are extensively adopted by electric bus, domestic state-of-the-art pure electric coach (all having carried out the carrying operation in the Olympic Games, World Expo and the Asian Games) has adopted mechanical automatic gearbox at present, this car is by carrying out integrated control to motor and automatic mechanical transmission (AMT), utilize the characteristic of motor speed-regulating, cancelled clutch, realized self shifter.But in the middle of actual motion, also exist long, shortcoming such as shift impact is obvious of gearshift time, what its basic reason was that present automatic mechanical transmission adopts is traditional fixedly shaft type gearbox, when gearshift, the operation that the control synchro of not only wanting is plucked retaining and put into gear, also to carry out speed governing, cause the gearshift time to increase, simultaneously in the shift process motor, the drive motor driving force disappears earlier and recovers, also can cause significantly shift impact.In order to improve this kind of drive, the present invention has been changed to the planetary gear type gearbox with conventional fixed shaft type gearbox, and has saved the link of motor speed-regulating, has shortened the gearshift time, has improved shift quality.

The model utility content

The purpose of this utility model provides a kind of used for electric vehicle planetary gear type automatic speed-changing system, to overcome above-mentioned the deficiencies in the prior art.

The purpose of this utility model is to be achieved through the following technical solutions:

A kind of used for electric vehicle planetary gear type automatic speed-changing system, planet row, back planet row and input shaft before comprising, first planet carrier is drawn together in wherein preceding planet package, and first planet carrier is provided with first planetary pinion and second planetary pinion; Second planet carrier is drawn together in back planet package, and second planet carrier is provided with the third line star gear and fourth line star gear; The input shaft front end is provided with sun gear, the sun gear of described input shaft front end and first planetary pinion and second planetary pinion are connected with a joggle, first planetary pinion and second planetary pinion are connected with a joggle with first gear ring respectively, be provided with first clutch between first planet carrier and first gear ring, first gear ring is provided with first break; First planet carrier is connected with fourth line star gear engagement with the third line star gear, and the third line star gear and fourth line star gear are connected with a joggle with second gear ring respectively; Be provided with second clutch between second planet carrier and second gear ring, second gear ring is provided with second break, and second planet carrier is connected with output shaft.

The beneficial effects of the utility model are: simple and compact for structure, volume weight is less, the overall direct-connected gearbox of drive motor; No-clutch, can adopt the integrated control of motor and gearbox, the control motor enters a free schema during gearshift, under this pattern, motor is not in the output torque, only depend on the inertia rotation, so that the gear shift operation of gearbox, this kind structure transmission efficiency is higher, saved the link of motor speed-regulating, shorten the gearshift time, improved shift quality, met automobile lightweight principle.

Description of drawings

With reference to the accompanying drawings the utility model is described in further detail below.

Fig. 1 is the structural principle schematic representation of the described a kind of used for electric vehicle planetary gear type automatic speed-changing system of the utility model embodiment;

Fig. 2 is the user mode reference drawing of the described a kind of used for electric vehicle planetary gear type automatic speed-changing system of the utility model embodiment.

Among the figure:

1, first planet carrier; 101, first planetary pinion; 102, second planetary pinion; 2, second planet carrier; 201, the third line star gear; 202, fourth line star gear; 3, input shaft; 4, sun gear; 5, first gear ring; 6, first clutch; 7, first break; 8, second gear ring; 9, second clutch; 10, second break; 11, output shaft.

Embodiment

Shown in Fig. 1-2, the described a kind of used for electric vehicle planetary gear type automatic speed-changing system of the utility model embodiment, planet row, back planet row and input shaft 3 before comprising, wherein preceding planet package is drawn together first planet carrier, 1, the first planet carrier 1 and is provided with first planetary pinion 101 and second planetary pinion 102; Back planet package is drawn together second planet carrier, 2, the second planet carriers 2 and is provided with the third line star gear 201 and fourth line star gear 202; Input shaft 3 front ends are provided with sun gear 4, the sun gear 4 of described input shaft 3 front ends and first planetary pinion 101 and second planetary pinion 102 are connected with a joggle, first planetary pinion 101 and second planetary pinion 102 are connected with a joggle with first gear ring 5 respectively, be provided with first clutch 6, the first gear rings 5 between first planet carrier 1 and first gear ring 5 and be provided with first break 7; First planet carrier 1 is connected with a joggle with the third line star gear 201 and fourth line star gear 202, and the third line star gear 201 and fourth line star gear 202 are connected with a joggle with second gear ring 8 respectively; Being provided with second clutch 9, the second gear rings 8 between second planet carrier 2 and second gear ring 8 is provided with second break, 10, the second planet carriers 2 and is connected with output shaft 11.

During concrete the use, during one retaining, first break 7 and second break 10 are fixing with first gear ring 5 and second gear ring 8 respectively, power enters from input shaft 3, and by 1 output of first planet carrier, first planet carrier 1 is again the sun gear of the third line star gear 201 and fourth line star gear 202 simultaneously, power is through the third line star gear 201 and fourth line star gear 202, from 2 outputs of second planet carrier, the power transmission direction is a forward, for slowing down.

During two retainings, first break 7 is fixing with first gear ring 5, second clutch 9 closures, power enters from input shaft 3, by 1 output of first planet carrier, first planet carrier 1 is again the sun gear of the third line star gear 201 and fourth line star gear 202 simultaneously, and because second clutch 9 closures, second gear ring 8 and second planet carrier 2 are as a whole, the velocity ratio of the third line star gear 201 and fourth line star gear 202 is 1, directly by 2 outputs of second planet carrier, the power transmission direction is a forward to the power of first planet carrier, 1 output, for slowing down.

During three retainings, second break 10 is fixing with second gear ring 8, first clutch 6 closures, power enters from input shaft 3, and first gear ring 5 and first planet carrier 1 are as a whole, and preceding planet row velocity ratio is 1, only depend on back planet row to slow down, the power transmission direction is a forward, slows down.

During four retainings, first clutch 6 and second clutch 9 are all closed, and at this moment, first planetary pinion 101, second planetary pinion 102, the third line star gear 201 and fourth line star gear 202 are all as a whole, are equivalent to direct retaining, and velocity ratio is 1.

Reversing gear reverses by motor realizes.

Claims

1. used for electric vehicle planetary gear type automatic speed-changing system, planet row, back planet row and input shaft (3) before comprising, first planet carrier (1) is drawn together in wherein preceding planet package, and first planet carrier (1) is provided with first planetary pinion (101) and second planetary pinion (102); Second planet carrier (2) is drawn together in back planet package, and second planet carrier (2) is provided with the third line star gear (201) and fourth line star gear (202); Input shaft (3) front end is provided with sun gear (4), it is characterized in that: the sun gear (4) of described input shaft (3) front end is connected with a joggle with first planetary pinion (101) and second planetary pinion (102), first planetary pinion (101) and second planetary pinion (102) are connected with a joggle with first gear ring (5) respectively, be provided with first clutch (6) between first planet carrier (1) and first gear ring (5), first gear ring (5) is provided with first break (7); First planet carrier (1) is connected with a joggle with the third line star gear (201) and fourth line star gear (202), and the third line star gear (201) and fourth line star gear (202) are connected with a joggle with second gear ring (8) respectively; Be provided with second clutch (9) between second planet carrier (2) and second gear ring (8), second gear ring (8) is provided with second break (10), and second planet carrier (2) is connected with output shaft (11).