CN206754299U

CN206754299U - Eight speed automatic transmissions

Info

Publication number: CN206754299U
Application number: CN201720458844.XU
Authority: CN
Inventors: 张安伟; 谢天礼; 邰昌宁; 凌晓明; 周友; 刘学武; 关佳景
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2017-04-27
Filing date: 2017-04-27
Publication date: 2017-12-15
Anticipated expiration: 2027-04-27

Abstract

The utility model provides a kind of eight speed automatic transmissions, including input link, output link, case of transmission, the first planetary gearsets, the second planetary gearsets, third planet gear train, fourth planet gear train, first clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch.Eight speed automatic transmission of the present utility model, by four planetary gearsets, the Reasonable Arrangement of five clutches, realize eight forward gears and one reverses gear.In addition, substituting brake by using clutch reaches increase clutch quantity, the purpose of reduction brake quantity (not having to brake), be advantageous to the nested designs of clutch, and reduce case of transmission difficulty of processing and manufacturing cost.It is more beneficial for cutting off the idle running planetary gearsets for being not involved in actual transfer power under specific gear using the scheme of more multi-clutch simultaneously, reduces band row's towing and be lost, improve system effectiveness.

Description

Eight speed automatic transmissions

Technical field

The utility model belongs to technical field of automobile transmission, more particularly to a kind of eight speed automatic transmissions.

Background technology

In the prior art, the automatic transmission (Automatic Transmission, AT) for automobile generally includes defeated Enter component, output link, planetary gearsets, clutch/brake and connection input link, output link, planetary gearsets With the driving member of clutch/brake.Initiating element of the input link generally with being integrated with lockup clutch, torsional vibration damper It is connected, such as fluid torque-converter.From theory of mechanics, the quantity that it is mechanism power source that mechanism, which has the condition for determining to move, is equal to Mechanism rotating speed number of degrees of freedom,.Because AT is to realize different gears by the combined engagement of different clutch/brakes, that is, pass through system Dynamic device/clutch confining part free degree, degree of freedom in system purpose is reduced so as to reach, it is final to ensure that mechanism has the fortune determined It is dynamic.For the single power source planetary transmission that a degree of freedom in system number is N, it is to pass through braking to have the condition for determining to move The operating elements such as device/clutch limit (N-1) individual rotating speed free degree.

The volume of automatic transmission, weight, efficiency and bearing capacity are directly relevant with planetary gears.Planetary gear Group number, clutch/brake number and driving member connection determine the complexity of transmission scheme structure arrangement to a certain extent Degree.Number of degrees of freedom, increases the operating element increasing number for conversion of being shifted gears between adjacent gear, will all cause HCU/TCU controls Difficulty increases.The power transmission line of each gear depends on transmission scheme, should avoid the occurrence of internal power circulation, influence each gear The situation of position transmission efficiency occurs.

With automobile emission regulation, increasingly the requirement of harshness and the requirement of fuel economy, transmission gear demand increase It is more.For planetary automatic transmission, increase gear by two kinds of approach：First, increase planet row (planetary gearsets) quantity；Two It is increase free degree quantity (being easily caused operating element to increase).Therefore, seek a kind of optimal group of planet row and operating element quantity Conjunction, the compact-sized and efficient planetary automatic speed-changing mechanism of transmission turn into the pass of major vehicle enterprise or research and development institution's product development Key.

Mainly there are ZF 8HP (longitudinal) in the market, like letter 8 fast (horizontal AWF8L35, longitudinal AWR8F45), be general The 8 fast planets such as 8L45 (longitudinal), fertile Thailand 8 of modernist fast (longitudinal A8TR1/A8LR1), the auspicious SR8AT-300 (horizontal) of Sheng become automatically Fast device product.

Auspicious horizontal 8AT is contained, passes through three simple planetary groups, three pairs of fixed axis gears (being free of jackshaft), four clutches The reasonable Arrangement of device and a brake realizes 8 forward gears and 1 reverses gear.In order to meet the compact axially sky of lateral gear Between require, the first planetary gearsets and the second planetary gearsets use not coaxially arranged (radial parallel arrangement), the first planet tooth Wheel group and engine are coaxial, and the second planetary gearsets and third planet gear train are coaxial.

Love believes horizontal 8AT, passes through three planetary gearsets (La Weina compound planetary gear sets and interior external toothing double star gear Group), four clutches, the reasonable Arrangement of two brakes and an one-way clutch realize 8 forward gears and 1 reverses gear.It is interior The use of external toothing double star gear train ensures to realize the reasonable distribution of gearratio while part is not increased, so as to realize 8 Forward gear.Wella compound planetary gear set is drawn to regard a simple planetary group and an interior external toothing double star gear train as Aggregate, both common planet carriers and gear ring effectively shorten axial dimension, ensure that compact axially empty of lateral gear Between require.

With the requirement such as environmental regulation and oil consumption economy, vehicular transmission gear number is on the increase.It is more in order to meet Gear demand, necessarily cause planetary automatic transmission system planet row quantity or operating element increasing number, cause speed change body Product increase.And lateral gear is limited to by arrangement, axial space requires harsh.Therefore, compact-sized multi-speed becomes automatically Fast device turns into the emphasis of major research institution research.

In addition, the brake in operating element needs to be connected with case of transmission, excessive brake increases speed changer The difficulty of processing and manufacturing cost of housing, and due to the presence of brake, actual transfer power is not involved under specific gear Idle running planetary gearsets can produce band row's towing loss, reduce system effectiveness.

Utility model content

Technical problem to be solved in the utility model is to be directed to existing 8 speed automatic transmission, and due to brake In the presence of the idle running planetary gearsets of actual transfer power are not involved under specific gear can produce band row's towing loss, reduce A kind of the defects of system effectiveness, there is provided eight compact-sized speed automatic transmissions.

Technical scheme is as follows used by the utility model solves above-mentioned technical problem：

A kind of eight speed automatic transmissions are provided, including：

Input link；

Output link；

Case of transmission；

First planetary gearsets, the second planetary gearsets, third planet gear train and fourth planet gear train；Described first Planetary gearsets include the first sun gear, the first planetary gear, the first gear ring and the first planet carrier；First sun gear and first Planetary gear external toothing is driven, and first planetary gear and the first gear ring Inside gear drive, first planetary gear are rotatably supported on On first planet carrier；Second planetary gearsets include the second sun gear, the second planetary gear, the second gear ring and the second row Carrier；Second sun gear and the second planetary gear external toothing are driven, second planetary gear and the second gear ring Inside gear drive, Second planetary gear is rotatably supported on second planet carrier；The third planet gear train includes the 3rd sun gear, the Three planetary gears, the 3rd gear ring and the third line carrier；3rd sun gear is driven with the external toothing of the third line star-wheel, described the third line Star-wheel and the 3rd gear ring Inside gear drive, the third line star-wheel are rotatably supported in the third line carrier；The fourth line Star gear train includes the 4th sun gear, fourth line star-wheel, the 4th gear ring and fourth line carrier；4th sun gear and fourth line Star-wheel external toothing is driven, and the fourth line star-wheel and the 4th gear ring Inside gear drive, the fourth line star-wheel are rotatably supported on institute State in fourth line carrier；Second planet carrier is fixedly linked with input link, and first sun gear is consolidated with the second sun gear Fixed to be connected, second gear ring is fixedly linked with the 3rd sun gear, and the 3rd gear ring is fixedly linked with the 4th sun gear, described Fourth line carrier is fixedly linked with output link, and first gear ring is fixedly linked with case of transmission；

First clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch, first sun Wheel is connected with the first planet carrier by the first clutch, and first planet carrier and the 4th gear ring pass through second clutch Device is connected, and the third line carrier is connected with fourth line carrier by the 3rd clutch, the third line carrier and the 3rd Gear ring is connected by the 4th clutch, and second planet carrier is connected with the 3rd gear ring by the 5th clutch；

The first clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch optionally connect Close or separate, to produce eight forward gears transmissions when back gear ratio between the input link and output link.

Alternatively, the third planet gear train and the radially superposed setting of fourth planet gear train, and the third planet Gear train is coaxially disposed with the overall structure that fourth planet gear train is formed and the first planetary gearsets and the second planetary gearsets.

Alternatively, by engaging the first clutch, second clutch and the 5th clutch, the 3rd clutch is separated Device and the 4th clutch, to produce 1 gear gearratio between the input link and output link；

By engaging the first clutch, second clutch and the 4th clutch, the 3rd clutch and the are separated Five clutches, to produce 2 gear gearratios between the input link and output link；

By engaging the second clutch, the 4th clutch and the 5th clutch, the first clutch and are separated Three clutches, to produce 3 gear gearratios between the input link and output link；

By engaging the second clutch, the 3rd clutch and the 4th clutch, the first clutch and are separated Five clutches, to produce 4 gear gearratios between the input link and output link；

By engaging the second clutch, the 3rd clutch and the 5th clutch, the first clutch and are separated Four clutches, to produce 5 gear gearratios between the input link and output link；

By engaging the 3rd clutch, the 4th clutch and the 5th clutch, the first clutch and are separated Two clutches, to produce 6 gear gearratios between the input link and output link；

By engaging the first clutch, the 3rd clutch and the 5th clutch, the second clutch and are separated Four clutches, to produce 7 gear gearratios between the input link and output link；

By engaging the first clutch, the 3rd clutch and the 4th clutch, the second clutch and are separated Five clutches, to produce 8 gear gearratios between the input link and output link；

By engaging the first clutch, second clutch and the 3rd clutch, the 4th clutch and the are separated Five clutches, to produce back gear ratio between the input link and output link.

In addition, the utility model additionally provides a kind of eight speed automatic transmissions, including：

Input link；

Output link；

Case of transmission；

First clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch, first sun Wheel is connected with the first planet carrier by the first clutch, and first planet carrier and the 4th gear ring pass through second clutch Device is connected, and the third line carrier is connected with fourth line carrier by the 3rd clutch, the third line carrier and the 3rd Sun gear is connected by the 4th clutch, and second planet carrier is connected with the 3rd gear ring by the 5th clutch；

Input link；

Output link；

Case of transmission；

First clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch, first sun Wheel is connected with the first planet carrier by the first clutch, and first planet carrier and the 4th gear ring pass through second clutch Device is connected, and the third line carrier is connected with fourth line carrier by the 3rd clutch, and the 3rd gear ring and the 3rd is too Sun wheel is connected by the 4th clutch, and second planet carrier is connected with the 3rd gear ring by the 5th clutch；

Input link；

Output link；

Case of transmission；

First planetary gearsets, the second planetary gearsets, third planet gear train and fourth planet gear train；Described first Planetary gearsets include the first sun gear, the first planetary gear, the first gear ring and the first planet carrier；First sun gear and first Planetary gear external toothing is driven, and first planetary gear and the first gear ring Inside gear drive, first planetary gear are rotatably supported on On first planet carrier；Second planetary gearsets include the second sun gear, the second planetary gear, the second gear ring and the second row Carrier；Second sun gear and the second planetary gear external toothing are driven, second planetary gear and the second gear ring Inside gear drive, Second planetary gear is rotatably supported on second planet carrier；The third planet gear train includes the 3rd sun gear, the Three planetary gears, the 3rd gear ring and the third line carrier；3rd sun gear is driven with the external toothing of the third line star-wheel, described the third line Star-wheel and the 3rd gear ring Inside gear drive, the third line star-wheel are rotatably supported in the third line carrier；The fourth line Star gear train includes the 4th sun gear, fourth line star-wheel, the 4th gear ring and fourth line carrier；4th sun gear and fourth line Star-wheel external toothing is driven, and the fourth line star-wheel and the 4th gear ring Inside gear drive, the fourth line star-wheel are rotatably supported on institute State in fourth line carrier；Second planet carrier is fixedly linked with input link, and first sun gear is consolidated with the second sun gear Fixed to be connected, the 3rd gear ring is fixedly linked with the 4th sun gear, and the third line carrier is fixedly linked with fourth line carrier, institute State fourth line carrier to be fixedly linked with output link, first gear ring is fixedly linked with case of transmission；

First clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch, first sun Wheel is connected with the first planet carrier by the first clutch, and first planet carrier and the 4th gear ring pass through second clutch Device is connected, and second gear ring is connected with the 3rd sun gear by the 3rd clutch, second gear ring and the 3rd gear ring It is connected by the 4th clutch, second planet carrier is connected with the 3rd gear ring by the 5th clutch；

Input link；

Output link；

Case of transmission；

First planetary gearsets, the second planetary gearsets, third planet gear train and fourth planet gear train；Described first Planetary gearsets include the first sun gear, the first planetary gear, the first gear ring and the first planet carrier；First sun gear and first Planetary gear external toothing is driven, and first planetary gear and the first gear ring Inside gear drive, first planetary gear are rotatably supported on On first planet carrier；Second planetary gearsets include the second sun gear, the second planetary gear, the second gear ring and the second row Carrier；Second sun gear and the second planetary gear external toothing are driven, second planetary gear and the second gear ring Inside gear drive, Second planetary gear is rotatably supported on second planet carrier；The third planet gear train includes the 3rd sun gear, the Three planetary gears, the 3rd gear ring and the third line carrier；3rd sun gear is driven with the external toothing of the third line star-wheel, described the third line Star-wheel and the 3rd gear ring Inside gear drive, the third line star-wheel are rotatably supported in the third line carrier；The fourth line Star gear train includes the 4th sun gear, fourth line star-wheel, the 4th gear ring and fourth line carrier；4th sun gear and fourth line Star-wheel external toothing is driven, and the fourth line star-wheel and the 4th gear ring Inside gear drive, the fourth line star-wheel are rotatably supported on institute State in fourth line carrier；Second planet carrier is fixedly linked with input link, and first sun gear is consolidated with the second sun gear Fixed to be connected, second gear ring is fixedly linked with the 3rd sun gear, and the third line carrier is fixedly linked with fourth line carrier, institute State fourth line carrier to be fixedly linked with output link, first gear ring is fixedly linked with case of transmission；

First clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch, first sun Wheel is connected with the first planet carrier by the first clutch, and first planet carrier and the 4th gear ring pass through second clutch Device is connected, and the 3rd gear ring is connected with the 4th sun gear by the 3rd clutch, and the 3rd sun gear and the 4th is too Sun wheel is connected by the 4th clutch, and second planet carrier is connected with the 4th sun gear by the 5th clutch；

Eight speed automatic transmission of the present utility model, it is real by four planetary gearsets, the Reasonable Arrangement of five clutches Show eight forward gears and one reverses gear.In addition, being substituted by using clutch, brake reaches increase clutch quantity, reduction is made The purpose of dynamic device quantity (not having to brake), is advantageous to the nested designs of clutch, and reduces case of transmission difficulty of processing And manufacturing cost.The cut-out under specific gear is more beneficial for using the scheme of more multi-clutch simultaneously and is not involved in actual transfer power Idle running planetary gearsets, reduce band row towing loss, improve system effectiveness.

Brief description of the drawings

Fig. 1 is the structure diagram for eight speed automatic transmissions that the utility model first embodiment provides；

Fig. 2 is that the eight speed automatic transmissions 1 gear power that the utility model first embodiment provides transmits schematic diagram；

Fig. 3 is that the eight speed automatic transmissions 2 gear power that the utility model first embodiment provides transmits schematic diagram；

Fig. 4 is that the eight speed automatic transmissions 3 gear power that the utility model first embodiment provides transmits schematic diagram；

Fig. 5 is that the eight speed automatic transmissions 4 gear power that the utility model first embodiment provides transmits schematic diagram；

Fig. 6 is that the eight speed automatic transmissions 5 gear power that the utility model first embodiment provides transmits schematic diagram；

Fig. 7 is that the eight speed automatic transmissions 6 gear power that the utility model first embodiment provides transmits schematic diagram；

Fig. 8 is that the eight speed automatic transmissions 7 gear power that the utility model first embodiment provides transmits schematic diagram；

Fig. 9 is that the eight speed automatic transmissions 8 gear power that the utility model first embodiment provides transmits schematic diagram；

Figure 10 be the utility model first embodiment provide eight speed automatic transmissions reverse gear power transmit schematic diagram；

Figure 11 is the structure diagram for eight speed automatic transmissions that the first modified example of the utility model first embodiment provides；

Figure 12 is the structure diagram for eight speed automatic transmissions that the second modified example of the utility model first embodiment provides；

Figure 13 is the structure diagram for eight speed automatic transmissions that the utility model second embodiment provides；

Figure 14 is the structure diagram for eight speed automatic transmissions that the utility model 3rd embodiment provides.

Reference in specification is as follows：

11st, input link；12nd, output link；

21st, case of transmission；

30th, the first planetary gearsets；31st, the first sun gear；32nd, the first planetary gear；33rd, the first gear ring；34th, the first planet Frame；

40th, the second planetary gearsets；41st, the second sun gear；42nd, the second planetary gear；43rd, the second gear ring；44th, the second planet Frame；

50th, third planet gear train；51st, the 3rd sun gear；52nd, the third line star-wheel；53rd, the 3rd gear ring；54th, third planet Frame；

60th, fourth planet gear train；61st, the 3rd sun gear；62nd, the third line star-wheel；63rd, the 3rd gear ring；64th, third planet Frame；

71st, first clutch；72nd, second clutch；73rd, the 3rd clutch；74th, the 4th clutch；75th, the 5th clutch Device；

211st, input link；212nd, output link；

221st, case of transmission；

230th, the first planetary gearsets；231st, the first sun gear；232nd, the first planetary gear；233rd, the first gear ring；234th, One planet carrier；

240th, the second planetary gearsets；241st, the second sun gear；242nd, the second planetary gear；243rd, the second gear ring；244th, Two planet carriers；

250th, third planet gear train；251st, the 3rd sun gear；252nd, the third line star-wheel；253rd, the 3rd gear ring；254th, Three planet carriers；

260th, fourth planet gear train；261st, the 3rd sun gear；262nd, the third line star-wheel；263rd, the 3rd gear ring；264th, Three planet carriers；

271st, first clutch；272nd, second clutch；273rd, the 3rd clutch；274th, the 4th clutch；275th, the 5th Clutch；

311st, input link；312nd, output link；

321st, case of transmission；

330th, the first planetary gearsets；331st, the first sun gear；332nd, the first planetary gear；333rd, the first gear ring；334th, One planet carrier；

340th, the second planetary gearsets；341st, the second sun gear；342nd, the second planetary gear；343rd, the second gear ring；344th, Two planet carriers；

350th, third planet gear train；351st, the 3rd sun gear；352nd, the third line star-wheel；353rd, the 3rd gear ring；354th, Three planet carriers；

360th, fourth planet gear train；361st, the 3rd sun gear；362nd, the third line star-wheel；363rd, the 3rd gear ring；364th, Three planet carriers；

371st, first clutch；372nd, second clutch；373rd, the 3rd clutch；374th, the 4th clutch；375th, the 5th Clutch.

Embodiment

In order that technical problem, technical scheme and beneficial effect that the utility model solves are more clearly understood, below Connection with figures and embodiment, the utility model is described in further detail.It is it should be appreciated that described herein specific real Example is applied only to explain the utility model, is not used to limit the utility model.

As shown in figure 1, eight speed automatic transmissions that the utility model first embodiment provides, including it is input link 11, defeated Go out component 12, case of transmission 21, the first planetary gearsets 30, the second planetary gearsets 40, third planet gear train the 50, the 4th Planetary gearsets 60, first clutch 71, second clutch 72, the 3rd clutch 73, the 4th clutch 74 and the 5th clutch 75。

In the present embodiment, each planetary gearsets are single star row of interior external toothing.Specially：

First planetary gearsets 30 include the first sun gear 31, the first planetary gear 32, the first gear ring 33, the first planet carrier 34.The external toothing of first sun gear, 31 and first planetary gear 32 transmission, first planetary gear 32 in the first gear ring 33 with nibbling Transmission is closed, first planetary gear 32 is rotatably supported on first planet carrier 34 by rolling or sliding bearing.

Second planetary gearsets 40 include the second sun gear 41, the second planetary gear 42, the second gear ring 43, the second planet carrier 44.The external toothing of second sun gear, 41 and second planetary gear 42 transmission, second planetary gear 42 in the second gear ring 43 with nibbling Transmission is closed, second planetary gear 42 is rotatably supported on second planet carrier 44 by rolling or sliding bearing.

Third planet gear train 50 includes the 3rd sun gear 51, the third line star-wheel 52, the 3rd gear ring 53, the third line carrier 54.3rd sun gear 51 is driven with the external toothing of the third line star-wheel 52, and the third line star-wheel 52 in the 3rd gear ring 53 with nibbling Transmission is closed, the third line star-wheel 52 is rotatably supported in the third line carrier 54 by rolling or sliding bearing.

Fourth planet gear train 50 includes the 4th sun gear 61, fourth line star-wheel 62, the 4th gear ring 63, fourth line carrier 64.4th sun gear 61 is driven with the external toothing of fourth line star-wheel 62, and the fourth line star-wheel 62 in the 4th gear ring 63 with nibbling Transmission is closed, the fourth line star-wheel 62 is rotatably supported in the fourth line carrier 64 by rolling or sliding bearing.

As shown in figure 1, second planet carrier 44 is fixedly linked with input link 11, first sun gear 31 and second Sun gear 41 is fixedly linked, and second gear ring 43 is fixedly linked with the 3rd sun gear 51, and the 3rd gear ring 53 and the 4th is too Sun wheel 61 is fixedly linked, and the fourth line carrier 64 is fixedly linked with output link 12, first gear ring 33 and transmission case Body 21 is fixedly linked.

As shown in figure 1, first sun gear 31 is connected with the first planet carrier 34 by the first clutch 71, it is described First planet carrier 34 is connected with the 4th gear ring 63 by the second clutch 72, the third line carrier 54 and fourth line carrier 64 are connected by the 3rd clutch 73, and the sun gear 51 of the third line carrier 54 and the 3rd passes through the 4th clutch 74 Connection, second planet carrier 44 are connected with the 3rd gear ring 53 by the 5th clutch 75.

In the present embodiment, the first clutch 71, second clutch 72, the 3rd clutch 73, the 4th clutch 74 and 5th clutch 75 is selectively engaged or separated, to produce eight advances between the input link 11 and output link 12 Gear is driven a when back gear ratio.

In the present embodiment, the first clutch 71, second clutch 72, the 3rd clutch 73, the 4th clutch 74 and The manipulation logic (shift logic) of 5th clutch 75 is referring to table 1 below：

Table 1

In table 1, mark ● represent that the operating element engages, blank space represents that the operating element separates.K1, k2, k3 and k4 points Wei not the first planetary gearsets 30, the second planetary gearsets 40, the row of third planet gear train 50 and fourth planet gear train 60 Star arranges characteristic parameter, and the planet row characteristic parameter is equal to the ratio between number of teeth of gear ring and sun gear.That is k1 is the first gear ring 33 and the The ratio between number of teeth of one sun gear 31, k2 are the ratio between number of teeth of the second gear ring 43 and the second sun gear 41, k3 be the 3rd gear ring 53 and The ratio between number of teeth of 3rd sun gear 51, k4 are the ratio between number of teeth of the 4th gear ring 63 and the 4th sun gear 61.

Referring to Fig. 1-10, under the manipulation logic of table 1, the power transmission line of eight speed automatic transmission is specific as follows (lines overstriking is handled on transfer route).

(1) 1 gear power transmission line

As shown in Fig. 2 only engaging first clutch 71, the clutch 75 of second clutch 72 and the 5th, 1 gear is realized, is driven Than for (1+k4).Reaction force is born in the overall revolution of first planetary gearsets 30, and essence only has fourth planet gear train 60 to participate in Power transmission.Because the first gear ring 33 with case of transmission 21 is constant is fixedly connected, and the first planetary gearsets 30 are overall turns round, Therefore the integral stop of the first planetary gearsets 30 when first clutch 71 engages.Now, when second clutch 72 engages, realize pair The braking of 4th gear ring 63.1 gear power transmission line：The sun gear 61-- the 4th of the 5th clutch 75-- of input link 11-- the 4th Planetary gear 62-- fourth line carrier 64-- output links 12.Reaction force transfer route：4th gear ring 63-- second clutches 72-- the first planet carrier 34-- the first planetary gear 32-- the first gear ring 33-- case of transmissions 21.

(2) 2 gear power transmission lines

As shown in figure 3, only engaging first clutch 71, the clutch 74 of second clutch 72 and the 4th, 2 gears are realized, are driven Than for (k2* (1+k4)/(1+k2)).Now, the first planetary gearsets 30 and the overall revolution of third planet gear train 50, essence is only There are the second planetary gearsets 40 and fourth planet gear train 60 to participate in power transmission.Because the first gear ring 33 and case of transmission 21 are permanent Surely it is fixedly connected, and the overall revolution of the first planetary gearsets 30, therefore the first planetary gearsets when first clutch 71 engages 30 integral stops, realize and the second sun gear 41 is braked.Now, when second clutch 72 engages, realize to the 4th gear ring 63 Braking.2 gear power transmission lines：Input link 11-- the second planet carrier 44-- the second planetary gear the second gear rings of 42-- 43-- the 3rd The sun gear 61-- fourth line star-wheel 62-- fourth line carrier of the 3rd gear ring 53-- of sun gear 51-- the third line star-wheel 52-- the 4th 64-- output links 12.Reaction force transfer route one：4th gear ring 63-- second clutches the first planet carriers of 72-- 34-- One planetary gear 32-- the first gear ring 33-- case of transmissions 21.Reaction force transfer route two：Second sun gear 41-- first is too Sun wheel 31-- the first planetary gear 32-- the first gear ring 33-- case of transmissions 21.

(3) 3 gear power transmission lines

As shown in figure 4, only engaging second clutch 72, the 4th clutch 74 and the 5th clutch 75,3 gears are realized, are driven Than for ((1+k1+k4+k4*k1)/(1+k1+k4)).Now, the second planetary gearsets 40 and the entirety of third planet gear train 50 are returned Turn, essence only has the first planetary gearsets 30 and fourth planet gear train 60 to participate in power transmission.3 gear power transmission include two Route, route one：Input link 11-- the second planet carrier 44-- the second planetary gear 42-- the second sun gear the first sun gears of 41-- The gear ring 63-- fourth line star-wheels 62---- of 31-- the first planetary gear 32-- the first planet carrier 34-- second clutches 72-- the 4th Four planet carrier 64-- output links 12；Route two：The sun gear 61-- fourth lines of the 5th clutch 75-- of input link 11-- the 4th Star-wheel 62-- fourth line carrier 64-- output links 12.Reaction force transfer route：First gear ring 33-- case of transmissions 21.

(4) 4 gear power transmission lines

As shown in figure 5, only engaging second clutch 72, the 3rd clutch 73 and the 4th clutch 74,4 gears are realized, are driven Than for ((1+k1+k2)/(1+k2)).Now, third planet gear train 50 and the overall revolution of fourth planet gear train 60, essence is only There are the first planetary gearsets 30 and the second planetary gearsets 40 to participate in power transmission.4 gear power transmission include two lines, route One：Input link 11-- the second planet carrier 44-- the second planetary gear 42-- the second sun gear 41-- the first sun gear 31-- the first rows The gear ring 63-- fourth line star-wheel 62---- fourth line carrier of star-wheel 32-- the first planet carrier 34-- second clutches 72-- the 4th 64-- output links 12；Route two：The sun gear 51-- of input link 11-- the second planetary gear the second gear rings of 42-- 43-- the 3rd The sun gear 61-- fourth line star-wheel 62-- fourth line carrier 64-- output links 12 of three the 3rd gear ring 53-- of planetary gear 52-- the 4th. Reaction force transfer route：First gear ring 33-- case of transmissions 21.

(5) 5 gear power transmission lines

As shown in fig. 6, only engage second clutch 72, the 3rd clutch 73 and the 5th clutch 75, now, the first planet Gear train 30, the second planetary gearsets 40, third planet gear train 50 and fourth planet gear train 60 participate in power transmission, with this 5 gears are realized, now, the gearratio of automatic eight speed changer of the gear is (1+k4+k1+k4*k1+k2*k4+k2*k3*k4)/(1+k1+ k2*k3*k4+k4+k2*k4).5 gear power transmission are more complicated, comprising dividing three times, confluxing, are for the first time shunting, occur second Planetary gearsets 40；Second is to conflux, and is occurred in third planet gear train 50；Third time occurs in fourth planet to conflux Gear train 60.Power transmission line one：Input link 11-- the second planet carrier 44-- the second planetary gear the second sun gears of 42-- The gear ring 63-- the 4th of 41-- the first sun gear 31-- the first planetary gear 32-- the first planet carrier 34-- second clutches 72-- the 4th Planetary gear 62-- fourth line carrier 64-- output links 12；Route two：Input link 11-- the second planet carrier the second planets of 44-- The sun gear 51-- the third lines star-wheels 52 of the second gear rings of 42-- 43-- the 3rd are taken turns (comprising the clutch 75-- of input link 11-- the 5th the The power of three gear ring 53-- the third lines star-wheels 52 confluxes) -- the clutch 73-- fourth line carrier 64-- of the third line carrier 54-- the 3rd Output link 12；Route three：The sun gear 61-- fourth line star-wheels 62-- the 4th of the 5th clutch 75-- of input link 11-- the 4th Planet carrier 64-- output links 12.Reaction force transfer route：First gear ring 33-- case of transmissions 21.

(6) 6 gear power transmission lines

As shown in fig. 7, only engaging the 3rd clutch 73, the 4th clutch 74 and the 5th clutch 75,6 gears are realized, are driven Than for 1.Now, second gear transmission group 40, the 3rd gear drive group 50 and the overall revolution of the 4th gear drive group 60, are direct Gear.Power transmission line：The clutch 74-- the third line carrier 54-- the 3rd of the 5th clutch 75-- of input link 11-- the 4th from Clutch 73-- fourth line carrier 64-- output links 12.

(7) 7 gear power transmission lines

As shown in figure 8, only engaging first clutch 71, the 3rd clutch 73 and the 5th clutch 75,7 gears are realized, are driven Than for k2* (1+k3)/(k2*k3+1+k2).Now, the overall revolution of the first planetary gearsets 30, it is actual there was only the second planetary gear Group 40 and third planet gear train 50 participate in power transmission.Power transmission line one：The second planet carriers of input link 11-- 44-- The clutches of the 3rd sun gear 51-- the third line star-wheel 52-- the third line carrier 54-- of second the second gear rings of planetary gear 42-- 43-- the 3rd Device 73-- fourth line carrier 64-- output links 12；Route two：The gear ring 53-- of the 5th clutch 75-- of input link 11-- the 3rd The clutch 73-- fourth line carrier 64-- output links 12 of the third line star-wheel 52-- the third line carrier 54-- the 3rd.Reaction force passes Pass route：Second sun gear 41-- the first sun gear 31-- the first planetary gear 32-- the first gear ring 33-- case of transmissions 21.

(8) 8 gear power transmission lines

As shown in figure 9, only engaging first clutch 71, the 3rd clutch 73 and the 4th clutch 74,8 gears are realized, are driven Than for k2/ (1+k2).Now, the first planetary gearsets 30 and the overall revolution of third planet gear train 50, it is actual there was only the second row Star gear train 40 participates in power transmission.Power transmission line：Input link 11-- the second planet carrier the second planetary gears of 44-- 42-- The clutch 73-- fourth planets of the 3rd sun gear 51-- the third line star-wheel 52-- the third line carrier 54-- of second gear ring 43-- the 3rd Frame 64-- output links 12.Reaction force transfer route：Second sun gear 41-- the first sun gear the first planetary gears of 31-- 32-- First gear ring 33-- case of transmissions 21.

(9) reverse gear power transmission line

As shown in Figure 10, first clutch 71, the clutch 73 of second clutch 72 and the 3rd are only engaged, realization is reversed gear, and is passed Dynamic ratio is-k2* (k3*k4-1)/(1+k2).Now, the overall revolution of the first planetary gearsets 30, it is actual there was only the second planetary gear Group 40, third planet gear train 50 and fourth planet gear train 60 participate in power transmission.Power is delivered in third planet and arranges 50 points Two-way is flowed into, two-way power confluxes arranges 60 in fourth planet, power transmission line：The second planet carriers of input link 11-- 44-- The sun gears 51 of two the second gear rings of planetary gear 42-- 43-- the 3rd, shunt route one：The third line star-wheel 52-- the third line carrier 54-- 3rd clutch 73-- fourth line carrier 64-- output links 12；Shunt route two：The gear ring 53-- of the third line star-wheel 52-- the 3rd 4th sun gear 61-- fourth line star-wheel 62-- fourth line carrier 64-- output links 12.Reaction force transfer route one：Second Sun gear 41-- the first sun gear 31-- the first planetary gear 32-- the first gear ring 33-- case of transmissions 21；Reaction force transmits road Line two：4th gear ring 63-- second clutches 72-- the first planet carrier 34-- the first planetary gear 32-- the first gear ring 33-- speed changers Housing 21.

Clutch effect is to realize being fixedly connected with separating between two components by engaging or separating, and common type has multi-disc Rotating vane type clutch and jaw clutch (Dog Clutch).That is, described first clutch 71, second clutch the 72, the 3rd Clutch 73, the 4th clutch 74 and the 5th clutch 75 are multiple-piece wet clutch or jaw clutch.

Brake effect is to realize being connected or separating for component and case of transmission by engaging or separating, with to component system Dynamic or separation.In the present embodiment, without brake.

In addition, referring to Figure 11, for the first remodeling example of the utility model first embodiment.It is defeated in the first remodeling example Enter component 11, output link 12, case of transmission 21, the first planetary gearsets 30, the second planetary gearsets 40, third planet tooth Wheel group 50 and the mutual position of fourth planet gear train 60 and annexation are constant.And still it is provided with first clutch 71st, second clutch 72, the 3rd clutch 73, the 4th clutch 74 and the 5th clutch 75.

The first remodeling example, the difference with embodiment illustrated in fig. 1 are that the position of the 4th clutch 74 is changed. That is, the first remodeling example, the 4th clutch 74 are moved between the third line carrier and the 3rd sun gear, i.e. described Three planet carriers are connected with the 3rd sun gear by the 4th clutch 74.

The first remodeling example, the first clutch 71, second clutch 72, the 3rd clutch 73, the 4th clutch 74 And the 5th clutch 75 manipulation logic (shift logic) it is identical with table 1.

It can be seen that the first remodeling example, although the shift in position of the 4th clutch 74, the gearratio respectively kept off is identical.

In addition, referring to Figure 12, for the second remodeling example of the utility model first embodiment.It is defeated in the second remodeling example Enter component 11, output link 12, case of transmission 21, the first planetary gearsets 30, the second planetary gearsets 40, third planet tooth Wheel group 50 and the mutual position of fourth planet gear train 60 and annexation are constant.And still it is provided with first clutch 71st, second clutch 72, the 3rd clutch 73, the 4th clutch 74 and the 5th clutch 75.

The second remodeling example, the difference with embodiment illustrated in fig. 1 are that the position of the 4th clutch 74 is changed. That is, the second remodeling example, the 4th clutch 74 are moved between the 3rd gear ring and the 3rd sun gear, i.e. the gear ring It is connected with the 3rd sun gear by the 4th clutch 74.

The second remodeling example, the first clutch 71, second clutch 72, the 3rd clutch 73, the 4th clutch 74 And the 5th clutch 75 manipulation logic (shift logic) it is identical with table 1.

It can be seen that the second remodeling example, although the shift in position of the 4th clutch 74, the gearratio respectively kept off is identical.

In addition, referring to Figure 13, for eight speed automatic transmissions of the utility model second embodiment.Compared with first implements, The position of 3rd clutch 273 is moved, and then causes, input link 211, output link 212, case of transmission 221, first Planetary gearsets 230, the second planetary gearsets 240, third planet gear train 250 and fourth planet gear train 260 are mutual Position and annexation be slightly different.And first clutch 271, second clutch 272, the 3rd clutch 273, the 4th clutch The annexation of the clutch 275 of device 274 and the 5th is slightly different.Specially：

Second planet carrier is fixedly linked (identical with first embodiment) with input link 211, first sun gear Be fixedly linked (identical with first embodiment) with the second sun gear, and the 3rd gear ring and the 4th sun gear are fixedly linked (with One embodiment is identical), the third line carrier is fixedly linked (, first embodiment different with first embodiment from fourth line carrier In, the third line carrier is connected with fourth line carrier by the 3rd clutch), the fourth line carrier is fixed with output link It is connected (identical with first embodiment), first gear ring is fixedly linked (identical with first embodiment) with case of transmission.Institute State the first sun gear to connect (identical with first embodiment) by the first clutch 271 with the first planet carrier, described first Planet carrier is connected (identical with first embodiment) with the 4th gear ring by the second clutch 272, second gear ring and Three sun gears be connected by the 3rd clutch 273 (it is different from first embodiment, in first embodiment, the second gear ring 43 and 3rd sun gear 51 is fixedly linked, and the 3rd clutch 73 is between the third line carrier 54 and fourth line carrier 64), described second Gear ring and the 3rd gear ring be connected by the 4th clutch 274 (it is different with first embodiment, in first embodiment, the second tooth Circle 43 is fixedly linked with the 3rd sun gear 51, and the 4th clutch 74 is located between the gear ring 53 of the third line carrier 54 and the 3rd), it is described Second planet carrier is connected (identical with first embodiment) with the 3rd gear ring by the 5th clutch 275.

The second embodiment, the first clutch 271, second clutch 272, the 3rd clutch 273, the 4th clutch 274 and the 5th clutch 275 manipulation logic (shift logic) referring to table 2 below.

Table 2

It can be seen that second embodiment and first embodiment, the gearratio respectively kept off is still identical.And contrast table 1 and table 2, it is seen then that Second embodiment and first embodiment, the first clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th The manipulation logic (shift logic) of clutch is identical.

In addition, referring to Figure 14, for eight speed automatic transmissions of the utility model 3rd embodiment.Compared with second implements, The position of 3rd clutch 373 is moved.Input link 211, output link 212, case of transmission 221, the first planetary gear The 230, second planetary gearsets 240 of group, third planet gear train 250 and the mutual position of fourth planet gear train 260 and Annexation keeps constant.First clutch 271, second clutch 272, the 3rd clutch 273, the 4th clutch 274 and The annexation of five clutches 275 is slightly different.Specially：

Second planet carrier is fixedly linked (identical with second embodiment) with input link 311, first sun gear Be fixedly linked (identical with second embodiment) with the second sun gear, and second gear ring and the 3rd sun gear are fixedly linked (with Two embodiments are different, and in second embodiment, second gear ring is connected with the 3rd sun gear by the 3rd clutch 273), it is described The third line carrier is fixedly linked identical with second embodiment with fourth line carrier), the fourth line carrier is fixed with output link It is connected identical with second embodiment), first gear ring is fixedly linked identical with second embodiment with case of transmission).It is described First sun gear is connected (identical with second embodiment) with the first planet carrier by the first clutch 371, the first row Carrier is connected (identical with second embodiment) with the 4th gear ring by the second clutch 372, the 3rd gear ring and the 4th Sun gear by the 3rd clutch 373 be connected (it is different from second embodiment, in second embodiment, the 3rd gear ring and 4th sun gear is fixedly linked), the 3rd sun gear is connected (with the 4th sun gear by the 4th clutch 374 Two embodiments are different, be spaced in second embodiment, between the 3rd sun gear and the 4th sun gear the 3rd clutch the 273, the 4th from Clutch 274), second planet carrier connects (identical with second embodiment) with the 4th sun gear by the 5th clutch.

The 3rd embodiment, the first clutch 371, second clutch 372, the 3rd clutch 373, the 4th clutch 374 and the 5th clutch 375 manipulation logic (shift logic) referring to table 3 below.

Table 3

It can be seen that 3rd embodiment and second embodiment, the gearratio respectively kept off is still identical.And contrast table 2 and table 3, it is seen then that Second embodiment and 3rd embodiment, the first clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th The manipulation logic (shift logic) of clutch is identical.

It can be seen that above-described embodiment has identical shift logic and identical gearratio.

In addition, in above-described embodiment, it is further preferable that third planet gear train with fourth planet gear train is radially superposed sets Put, and third planet gear train and the overall structure that fourth planet gear train is formed and the first planetary gearsets and the second planet tooth Wheel group is coaxially disposed.With this, shorten that the axial dimension of eight shift transmission is small, reduce the volume of eight shift transmission, can Realize the horizontal of eight shift transmission.

Eight speed automatic transmissions of the utility model above-described embodiment, pass through four planetary gearsets, five clutches Reasonable Arrangement, realizes eight forward gears and one reverses gear.In addition, substituting brake by using clutch reaches increase clutch Quantity, the purpose for reducing brake quantity (not having to brake), are advantageous to the nested designs of clutch, and reduce transmission case Body difficulty of processing and manufacturing cost.The cut-out under specific gear is more beneficial for using the scheme of more multi-clutch simultaneously and is not involved in reality The idle running planetary gearsets of border passing power, band row's towing loss is reduced, improves system effectiveness.

Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model Protection domain within.

Claims

A kind of 1. eight speed automatic transmissions, it is characterised in that including：

Input link；

Output link；

Case of transmission；

First planetary gearsets, the second planetary gearsets, third planet gear train and fourth planet gear train；First planet Gear train includes the first sun gear, the first planetary gear, the first gear ring and the first planet carrier；First sun gear and the first planet External toothing transmission, first planetary gear and the first gear ring Inside gear drive are taken turns, first planetary gear is rotatably supported on described On first planet carrier；Second planetary gearsets include the second sun gear, the second planetary gear, the second gear ring and the second planet Frame；Second sun gear and the second planetary gear external toothing are driven, second planetary gear and the second gear ring Inside gear drive, institute The second planetary gear is stated to be rotatably supported on second planet carrier；The third planet gear train includes the 3rd sun gear, the 3rd Planetary gear, the 3rd gear ring and the third line carrier；3rd sun gear is driven with the external toothing of the third line star-wheel, the third planet Wheel and the 3rd gear ring Inside gear drive, the third line star-wheel are rotatably supported in the third line carrier；The fourth planet Gear train includes the 4th sun gear, fourth line star-wheel, the 4th gear ring and fourth line carrier；4th sun gear and fourth planet External toothing transmission is taken turns, the fourth line star-wheel and the 4th gear ring Inside gear drive, the fourth line star-wheel is rotatably supported on described In fourth line carrier；Second planet carrier is fixedly linked with input link, and first sun gear is fixed with the second sun gear It is connected, second gear ring is fixedly linked with the 3rd sun gear, and the 3rd gear ring is fixedly linked with the 4th sun gear, and described the Four planet carriers are fixedly linked with output link, and first gear ring is fixedly linked with case of transmission；

First clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch, first sun gear with First planet carrier is connected by the first clutch, and first planet carrier is connected with the 4th gear ring by the second clutch Connect, the third line carrier is connected with fourth line carrier by the 3rd clutch, the third line carrier and the 3rd gear ring Connected by the 4th clutch, second planet carrier is connected with the 3rd gear ring by the 5th clutch；

The first clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch be selectively engaged or Separation, to produce eight forward gear transmissions when back gear ratio between the input link and output link.
2. eight speed automatic transmission according to claim 1, it is characterised in that the third planet gear train and fourth line The radially superposed setting of star gear train, and the overall structure and first that the third planet gear train is formed with fourth planet gear train Planetary gearsets and the second planetary gearsets are coaxially disposed.
3. eight speed automatic transmission according to claim 1 or 2, it is characterised in that by engage the first clutch, Second clutch and the 5th clutch, the 3rd clutch and the 4th clutch are separated, with the input link and output 1 gear gearratio is produced between component；

By engaging the first clutch, second clutch and the 4th clutch, separate the 3rd clutch and the 5th from Clutch, to produce 2 gear gearratios between the input link and output link；

By engaging the second clutch, the 4th clutch and the 5th clutch, separate the first clutch and the 3rd from Clutch, to produce 3 gear gearratios between the input link and output link；

By engaging the second clutch, the 3rd clutch and the 4th clutch, separate the first clutch and the 5th from Clutch, to produce 4 gear gearratios between the input link and output link；

By engaging the second clutch, the 3rd clutch and the 5th clutch, separate the first clutch and the 4th from Clutch, to produce 5 gear gearratios between the input link and output link；

By engaging the 3rd clutch, the 4th clutch and the 5th clutch, separate the first clutch and second from Clutch, to produce 6 gear gearratios between the input link and output link；

By engaging the first clutch, the 3rd clutch and the 5th clutch, separate the second clutch and the 4th from Clutch, to produce 7 gear gearratios between the input link and output link；

By engaging the first clutch, the 3rd clutch and the 4th clutch, separate the second clutch and the 5th from Clutch, to produce 8 gear gearratios between the input link and output link；

By engaging the first clutch, second clutch and the 3rd clutch, separate the 4th clutch and the 5th from Clutch, to produce back gear ratio between the input link and output link.
A kind of 4. eight speed automatic transmissions, it is characterised in that including：

Input link；

Output link；

Case of transmission；

First planetary gearsets, the second planetary gearsets, third planet gear train and fourth planet gear train；First planet Gear train includes the first sun gear, the first planetary gear, the first gear ring and the first planet carrier；First sun gear and the first planet External toothing transmission, first planetary gear and the first gear ring Inside gear drive are taken turns, first planetary gear is rotatably supported on described On first planet carrier；Second planetary gearsets include the second sun gear, the second planetary gear, the second gear ring and the second planet Frame；Second sun gear and the second planetary gear external toothing are driven, second planetary gear and the second gear ring Inside gear drive, institute The second planetary gear is stated to be rotatably supported on second planet carrier；The third planet gear train includes the 3rd sun gear, the 3rd Planetary gear, the 3rd gear ring and the third line carrier；3rd sun gear is driven with the external toothing of the third line star-wheel, the third planet Wheel and the 3rd gear ring Inside gear drive, the third line star-wheel are rotatably supported in the third line carrier；The fourth planet Gear train includes the 4th sun gear, fourth line star-wheel, the 4th gear ring and fourth line carrier；4th sun gear and fourth planet External toothing transmission is taken turns, the fourth line star-wheel and the 4th gear ring Inside gear drive, the fourth line star-wheel is rotatably supported on described In fourth line carrier；Second planet carrier is fixedly linked with input link, and first sun gear is fixed with the second sun gear It is connected, second gear ring is fixedly linked with the 3rd sun gear, and the 3rd gear ring is fixedly linked with the 4th sun gear, and described the Four planet carriers are fixedly linked with output link, and first gear ring is fixedly linked with case of transmission；

First clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch, first sun gear with First planet carrier is connected by the first clutch, and first planet carrier is connected with the 4th gear ring by the second clutch Connect, the third line carrier is connected with fourth line carrier by the 3rd clutch, the third line carrier and the 3rd sun Wheel is connected by the 4th clutch, and second planet carrier is connected with the 3rd gear ring by the 5th clutch；

The first clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch be selectively engaged or Separation, to produce eight forward gear transmissions when back gear ratio between the input link and output link.
5. eight speed automatic transmission according to claim 4, it is characterised in that the third planet gear train and fourth line The radially superposed setting of star gear train, and the overall structure and first that the third planet gear train is formed with fourth planet gear train Planetary gearsets and the second planetary gearsets are coaxially disposed.
6. eight speed automatic transmissions according to claim 4 or 5, it is characterised in that by engage the first clutch, Second clutch and the 5th clutch, the 3rd clutch and the 4th clutch are separated, with the input link and output 1 gear gearratio is produced between component；

By engaging the first clutch, second clutch and the 4th clutch, separate the 3rd clutch and the 5th from Clutch, to produce 2 gear gearratios between the input link and output link；

By engaging the second clutch, the 4th clutch and the 5th clutch, separate the first clutch and the 3rd from Clutch, to produce 3 gear gearratios between the input link and output link；

By engaging the second clutch, the 3rd clutch and the 4th clutch, separate the first clutch and the 5th from Clutch, to produce 4 gear gearratios between the input link and output link；

By engaging the second clutch, the 3rd clutch and the 5th clutch, separate the first clutch and the 4th from Clutch, to produce 5 gear gearratios between the input link and output link；

By engaging the 3rd clutch, the 4th clutch and the 5th clutch, separate the first clutch and second from Clutch, to produce 6 gear gearratios between the input link and output link；

By engaging the first clutch, the 3rd clutch and the 5th clutch, separate the second clutch and the 4th from Clutch, to produce 7 gear gearratios between the input link and output link；

By engaging the first clutch, the 3rd clutch and the 4th clutch, separate the second clutch and the 5th from Clutch, to produce 8 gear gearratios between the input link and output link；

By engaging the first clutch, second clutch and the 3rd clutch, separate the 4th clutch and the 5th from Clutch, to produce back gear ratio between the input link and output link.
A kind of 7. eight speed automatic transmissions, it is characterised in that including：

Input link；

Output link；

Case of transmission；

First planetary gearsets, the second planetary gearsets, third planet gear train and fourth planet gear train；First planet Gear train includes the first sun gear, the first planetary gear, the first gear ring and the first planet carrier；First sun gear and the first planet External toothing transmission, first planetary gear and the first gear ring Inside gear drive are taken turns, first planetary gear is rotatably supported on described On first planet carrier；Second planetary gearsets include the second sun gear, the second planetary gear, the second gear ring and the second planet Frame；Second sun gear and the second planetary gear external toothing are driven, second planetary gear and the second gear ring Inside gear drive, institute The second planetary gear is stated to be rotatably supported on second planet carrier；The third planet gear train includes the 3rd sun gear, the 3rd Planetary gear, the 3rd gear ring and the third line carrier；3rd sun gear is driven with the external toothing of the third line star-wheel, the third planet Wheel and the 3rd gear ring Inside gear drive, the third line star-wheel are rotatably supported in the third line carrier；The fourth planet Gear train includes the 4th sun gear, fourth line star-wheel, the 4th gear ring and fourth line carrier；4th sun gear and fourth planet External toothing transmission is taken turns, the fourth line star-wheel and the 4th gear ring Inside gear drive, the fourth line star-wheel is rotatably supported on described In fourth line carrier；Second planet carrier is fixedly linked with input link, and first sun gear is fixed with the second sun gear It is connected, second gear ring is fixedly linked with the 3rd sun gear, and the 3rd gear ring is fixedly linked with the 4th sun gear, and described the Four planet carriers are fixedly linked with output link, and first gear ring is fixedly linked with case of transmission；

First clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch, first sun gear with First planet carrier is connected by the first clutch, and first planet carrier is connected with the 4th gear ring by the second clutch Connect, the third line carrier is connected with fourth line carrier by the 3rd clutch, the 3rd gear ring and the 3rd sun gear Connected by the 4th clutch, second planet carrier is connected with the 3rd gear ring by the 5th clutch；

The first clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch be selectively engaged or Separation, to produce eight forward gear transmissions when back gear ratio between the input link and output link.
8. eight speed automatic transmission according to claim 7, it is characterised in that the third planet gear train and fourth line The radially superposed setting of star gear train, and the overall structure and first that the third planet gear train is formed with fourth planet gear train Planetary gearsets and the second planetary gearsets are coaxially disposed.
9. eight speed automatic transmissions according to claim 7 or 8, it is characterised in that by engage the first clutch, Second clutch and the 5th clutch, the 3rd clutch and the 4th clutch are separated, with the input link and output 1 gear gearratio is produced between component；

By engaging the first clutch, second clutch and the 4th clutch, separate the 3rd clutch and the 5th from Clutch, to produce 2 gear gearratios between the input link and output link；

By engaging the second clutch, the 4th clutch and the 5th clutch, separate the first clutch and the 3rd from Clutch, to produce 3 gear gearratios between the input link and output link；

By engaging the second clutch, the 3rd clutch and the 4th clutch, separate the first clutch and the 5th from Clutch, to produce 4 gear gearratios between the input link and output link；

By engaging the second clutch, the 3rd clutch and the 5th clutch, separate the first clutch and the 4th from Clutch, to produce 5 gear gearratios between the input link and output link；

By engaging the 3rd clutch, the 4th clutch and the 5th clutch, separate the first clutch and second from Clutch, to produce 6 gear gearratios between the input link and output link；

By engaging the first clutch, the 3rd clutch and the 5th clutch, separate the second clutch and the 4th from Clutch, to produce 7 gear gearratios between the input link and output link；

By engaging the first clutch, the 3rd clutch and the 4th clutch, separate the second clutch and the 5th from Clutch, to produce 8 gear gearratios between the input link and output link；

By engaging the first clutch, second clutch and the 3rd clutch, separate the 4th clutch and the 5th from Clutch, to produce back gear ratio between the input link and output link.
A kind of 10. eight speed automatic transmissions, it is characterised in that including：

Input link；

Output link；

Case of transmission；

First planetary gearsets, the second planetary gearsets, third planet gear train and fourth planet gear train；First planet Gear train includes the first sun gear, the first planetary gear, the first gear ring and the first planet carrier；First sun gear and the first planet External toothing transmission, first planetary gear and the first gear ring Inside gear drive are taken turns, first planetary gear is rotatably supported on described On first planet carrier；Second planetary gearsets include the second sun gear, the second planetary gear, the second gear ring and the second planet Frame；Second sun gear and the second planetary gear external toothing are driven, second planetary gear and the second gear ring Inside gear drive, institute The second planetary gear is stated to be rotatably supported on second planet carrier；The third planet gear train includes the 3rd sun gear, the 3rd Planetary gear, the 3rd gear ring and the third line carrier；3rd sun gear is driven with the external toothing of the third line star-wheel, the third planet Wheel and the 3rd gear ring Inside gear drive, the third line star-wheel are rotatably supported in the third line carrier；The fourth planet Gear train includes the 4th sun gear, fourth line star-wheel, the 4th gear ring and fourth line carrier；4th sun gear and fourth planet External toothing transmission is taken turns, the fourth line star-wheel and the 4th gear ring Inside gear drive, the fourth line star-wheel is rotatably supported on described In fourth line carrier；Second planet carrier is fixedly linked with input link, and first sun gear is fixed with the second sun gear It is connected, the 3rd gear ring is fixedly linked with the 4th sun gear, and the third line carrier is fixedly linked with fourth line carrier, described Fourth line carrier is fixedly linked with output link, and first gear ring is fixedly linked with case of transmission；

First clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch, first sun gear with First planet carrier is connected by the first clutch, and first planet carrier is connected with the 4th gear ring by the second clutch Connect, second gear ring is connected with the 3rd sun gear by the 3rd clutch, and second gear ring passes through with the 3rd gear ring 4th clutch is connected, and second planet carrier is connected with the 3rd gear ring by the 5th clutch；

The first clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch be selectively engaged or Separation, to produce eight forward gear transmissions when back gear ratio between the input link and output link.
11. eight speed automatic transmission according to claim 10, it is characterised in that the third planet gear train and the 4th The radially superposed setting of planetary gearsets, and the overall structure that forms of the third planet gear train and fourth planet gear train and the One planetary gearsets and the second planetary gearsets are coaxially disposed.
12. eight speed automatic transmissions according to claim 10 or 11, it is characterised in that by engaging first clutch Device, second clutch and the 5th clutch, separate the 3rd clutch and the 4th clutch, with the input link with it is defeated Generation 1 keeps off gearratio between going out component；

By engaging the first clutch, second clutch and the 4th clutch, separate the 3rd clutch and the 5th from Clutch, to produce 2 gear gearratios between the input link and output link；

By engaging the second clutch, the 4th clutch and the 5th clutch, separate the first clutch and the 3rd from Clutch, to produce 3 gear gearratios between the input link and output link；

By engaging the second clutch, the 3rd clutch and the 4th clutch, separate the first clutch and the 5th from Clutch, to produce 4 gear gearratios between the input link and output link；

By engaging the second clutch, the 3rd clutch and the 5th clutch, separate the first clutch and the 4th from Clutch, to produce 5 gear gearratios between the input link and output link；

By engaging the 3rd clutch, the 4th clutch and the 5th clutch, separate the first clutch and second from Clutch, to produce 6 gear gearratios between the input link and output link；

By engaging the first clutch, the 3rd clutch and the 5th clutch, separate the second clutch and the 4th from Clutch, to produce 7 gear gearratios between the input link and output link；

By engaging the first clutch, the 3rd clutch and the 4th clutch, separate the second clutch and the 5th from Clutch, to produce 8 gear gearratios between the input link and output link；

By engaging the first clutch, second clutch and the 3rd clutch, separate the 4th clutch and the 5th from Clutch, to produce back gear ratio between the input link and output link.
A kind of 13. eight speed automatic transmissions, it is characterised in that including：

Input link；

Output link；

Case of transmission；

First planetary gearsets, the second planetary gearsets, third planet gear train and fourth planet gear train；First planet Gear train includes the first sun gear, the first planetary gear, the first gear ring and the first planet carrier；First sun gear and the first planet External toothing transmission, first planetary gear and the first gear ring Inside gear drive are taken turns, first planetary gear is rotatably supported on described On first planet carrier；Second planetary gearsets include the second sun gear, the second planetary gear, the second gear ring and the second planet Frame；Second sun gear and the second planetary gear external toothing are driven, second planetary gear and the second gear ring Inside gear drive, institute The second planetary gear is stated to be rotatably supported on second planet carrier；The third planet gear train includes the 3rd sun gear, the 3rd Planetary gear, the 3rd gear ring and the third line carrier；3rd sun gear is driven with the external toothing of the third line star-wheel, the third planet Wheel and the 3rd gear ring Inside gear drive, the third line star-wheel are rotatably supported in the third line carrier；The fourth planet Gear train includes the 4th sun gear, fourth line star-wheel, the 4th gear ring and fourth line carrier；4th sun gear and fourth planet External toothing transmission is taken turns, the fourth line star-wheel and the 4th gear ring Inside gear drive, the fourth line star-wheel is rotatably supported on described In fourth line carrier；Second planet carrier is fixedly linked with input link, and first sun gear is fixed with the second sun gear It is connected, second gear ring is fixedly linked with the 3rd sun gear, and the third line carrier is fixedly linked with fourth line carrier, described Fourth line carrier is fixedly linked with output link, and first gear ring is fixedly linked with case of transmission；

First clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch, first sun gear with First planet carrier is connected by the first clutch, and first planet carrier is connected with the 4th gear ring by the second clutch Connect, the 3rd gear ring is connected with the 4th sun gear by the 3rd clutch, the 3rd sun gear and the 4th sun gear It is connected by the 4th clutch, second planet carrier is connected with the 4th sun gear by the 5th clutch；

The first clutch, second clutch, the 3rd clutch, the 4th clutch and the 5th clutch be selectively engaged or Separation, to produce eight forward gear transmissions when back gear ratio between the input link and output link.
14. eight speed automatic transmission according to claim 13, it is characterised in that the third planet gear train and the 4th The radially superposed setting of planetary gearsets, and the overall structure that forms of the third planet gear train and fourth planet gear train and the One planetary gearsets and the second planetary gearsets are coaxially disposed.
15. eight speed automatic transmissions according to claim 13 or 14, it is characterised in that by engaging first clutch Device, second clutch and the 5th clutch, separate the 3rd clutch and the 4th clutch, with the input link with it is defeated Generation 1 keeps off gearratio between going out component；

By engaging the first clutch, second clutch and the 4th clutch, separate the 3rd clutch and the 5th from Clutch, to produce 2 gear gearratios between the input link and output link；

By engaging the second clutch, the 4th clutch and the 5th clutch, separate the first clutch and the 3rd from Clutch, to produce 3 gear gearratios between the input link and output link；

By engaging the second clutch, the 3rd clutch and the 4th clutch, separate the first clutch and the 5th from Clutch, to produce 4 gear gearratios between the input link and output link；

By engaging the second clutch, the 3rd clutch and the 5th clutch, separate the first clutch and the 4th from Clutch, to produce 5 gear gearratios between the input link and output link；

By engaging the 3rd clutch, the 4th clutch and the 5th clutch, separate the first clutch and second from Clutch, to produce 6 gear gearratios between the input link and output link；

By engaging the first clutch, the 3rd clutch and the 5th clutch, separate the second clutch and the 4th from Clutch, to produce 7 gear gearratios between the input link and output link；

By engaging the first clutch, the 3rd clutch and the 4th clutch, separate the second clutch and the 5th from Clutch, to produce 8 gear gearratios between the input link and output link；

By engaging the first clutch, second clutch and the 3rd clutch, separate the 4th clutch and the 5th from Clutch, to produce back gear ratio between the input link and output link.