CN106523627A - Seven-gear planetary automatic transmission - Google Patents

Seven-gear planetary automatic transmission Download PDF

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Publication number
CN106523627A
CN106523627A CN201611169019.4A CN201611169019A CN106523627A CN 106523627 A CN106523627 A CN 106523627A CN 201611169019 A CN201611169019 A CN 201611169019A CN 106523627 A CN106523627 A CN 106523627A
Authority
CN
China
Prior art keywords
gear
planet row
planet
driving member
brake
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201611169019.4A
Other languages
Chinese (zh)
Inventor
杨娟
罗静
李世鹏
秦龚玉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guizhou Winstar Hydraulic Transmission Machinery Co Ltd
Original Assignee
Guizhou Winstar Hydraulic Transmission Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guizhou Winstar Hydraulic Transmission Machinery Co Ltd filed Critical Guizhou Winstar Hydraulic Transmission Machinery Co Ltd
Priority to CN201611169019.4A priority Critical patent/CN106523627A/en
Publication of CN106523627A publication Critical patent/CN106523627A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H3/00Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/44Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
    • F16H3/62Gearings having three or more central gears
    • F16H3/66Gearings having three or more central gears composed of a number of gear trains without drive passing from one train to another
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H2200/00Transmissions for multiple ratios
    • F16H2200/003Transmissions for multiple ratios characterised by the number of forward speeds
    • F16H2200/0056Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising seven forward speeds
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H2200/00Transmissions for multiple ratios
    • F16H2200/0082Transmissions for multiple ratios characterised by the number of reverse speeds
    • F16H2200/0086Transmissions for multiple ratios characterised by the number of reverse speeds the gear ratios comprising two reverse speeds
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H2200/00Transmissions for multiple ratios
    • F16H2200/20Transmissions using gears with orbital motion
    • F16H2200/2002Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
    • F16H2200/2012Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with four sets of orbital gears
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H2200/00Transmissions for multiple ratios
    • F16H2200/20Transmissions using gears with orbital motion
    • F16H2200/203Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
    • F16H2200/2046Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes with six engaging means

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

The invention discloses a seven-gear planetary automatic transmission. The seven-gear planetary automatic transmission comprises an input component, an output component, five transmission components, four brakes, two clutches and four planetary gear trains. The automatic transmission adopts the scheme with the four planetary gear trains, the four brakes and the two clutches and is provided with seven forward gears and two reversing gears. The structure is simple and compact, and the space occupied by the transmission is reduced; and the transmission ratio range is wide, the clearance ratio is low, and power of an engine is fully and advantageously utilized under different working conditions.

Description

A kind of seven keep off planetary automatic transmission
Technical field
The present invention relates to mechanical speed change drive technology field, and in particular to a kind of seven keep off planetary automatic transmission.
Background technology
Drive system is one of element of vehicle, for transmitting engine power, and the energy in straight-line travelling Change speed and the pull strength of vehicle on request, drive system will also realize reversing and parking of vehicle etc..Variator is transmission A critically important part in system.At present, the road vehicle of main flow kept off with seven gear planetary automatic transmissions one, two gear speed ratios between Than larger, it is exactly that output speed fluctuation ratio is larger to be reflected on output speed, it is impossible to make finer regulation to slow-speed of revolution operating mode, Working machine easily produces shifting shock in running, work the phenomenon such as unstable, that is, cause from one grade to be raised to two grades or from Two grades can have greatly gearshift pause and transition in rhythm or melody when being down to one grade, have a strong impact on comfortableness and fuel economy.Such as U.S. ALLISON is public The speed of five gears of the planetary gear mechanism of the HT750DRD Hydrodynamic transmissions of department's production compares for i1=7.97, i2= 3.19th, i3=2.07, i4=1.4, i5=1, wherein a notch speed ratio are more larger than differing with two notch speeds, are unfavorable for that some need Jing normal The operation of the working machine switched between high rotating speed and the slow-speed of revolution.
The content of the invention
The present invention is intended to provide a kind of gear ratio is uniform, excellent performance can meet the use requirement of wheeled heavy-duty vehicle Seven gear planetary automatic transmissions, to solve the technical problem in the presence of prior art.
The present invention is achieved by following technical solution:
A kind of seven keep off planetary automatic transmission, including first planet row, the second planet row, third planet row and fourth planet Four planet rows of row, the first planet row include the first sun gear, the first gear ring, the first row carrier, second planet row Including the second sun gear, the second gear ring, the second planet carrier, the third planet row include the 3rd sun gear, the 3rd gear ring, the 3rd Planet carrier, the fourth planet row include the 4th sun gear, the 4th gear ring, fourth line carrier;
The input link being connected with input shaft and output shaft respectively and output link;
First driving member, the second driving member, the 3rd driving member, the 4th driving member and the 5th driving member five Driving member;
First brake, second brake, four brakes of the 3rd brake and the 4th brake;
Two clutches of first clutch and second clutch;
The input link connects the outer hub of the first sun gear, the outer hub of first clutch and second clutch;It is described defeated Go out component and connect the 4th sun gear and the third line carrier;First driving member connects the interior of the first gear ring and the first brake Hub;The interior hub of the second driving member connection the first row carrier, the second gear ring and second brake;3rd driving member Connect the interior hub of the second planet carrier, the 3rd gear ring, the 4th gear ring, the interior hub of second clutch and the 3rd brake;Described 4th Driving member connects the interior hub of fourth line carrier and the 4th brake;5th driving member connect the second sun gear, the 3rd The interior hub of sun gear and first clutch.
Planetary gear number in the first planet row, the second planet row, third planet row and fourth planet row is Single star planet row.
The k value of the first planet row, the second planet row, third planet row and fourth planet row is 1.5~2.5.
The invention has the beneficial effects as follows:
Compared with prior art, the seven gear planetary automatic transmissions that the present invention is provided, using four planet rows, four brakings The scheme of device and two clutches realizes seven drive shifts and two retroversion gears;Two fall back gear make vehicle in work backwards just In the power for making full use of electromotor to do to export;Four planet rows are the simple planet row of single star, and the k value of four planet rows exists In the range of 1.5~2.5, the integrally-built compactedness of change speed gear box is facilitated implementation, the volume and weight of change speed gear box, Jin Ershi is reduced Existing lightweight;And have the advantages that gear ratio is uniform, excellent performance.
Description of the drawings
Fig. 1 is the structural representation of the present invention;
In figure:1- input links, 2- output links, the first driving members of 3-, the second driving members of 4-, the transmission structures of 5- the 3rd Part, the 4th driving members of 6-, the 5th driving members of 7-, P1- first planet row, the second planet rows of P2-, P3- third planets row, P4- fourth planets are arranged, the first sun gears of T1-, the second sun gears of T2-, the 3rd sun gears of T3-, the 4th sun gears of T4-, Q1- first Gear ring, the second gear rings of Q2-, the 3rd gear rings of Q3-, the 4th gear rings of Q4-, J1- the first row carrier, the second planet carriers of J2-, J3- the 3rd Planet carrier, J4- fourth line carrier, the first brakes of M1-, M2- second brakes, the 3rd brakes of M3-, the 4th brakes of M4-, C1- first clutches, C2- second clutches.
Specific embodiment
Technical scheme is described further below in conjunction with drawings and Examples, but required protection domain It is not limited to described;
As shown in figure 1, the seven gear planetary automatic transmissions that the present invention is provided, including first planet row P1, the second planet row P2, third planet row P3 and fourth planet row's tetra- planet rows of P4, first planet row P1 include the first sun gear T1, first Gear ring Q1, the first row carrier J1, the second planet row P2 include the second sun gear T2, the second gear ring Q2, the second planet carrier J2, The third planet row P3 includes the 3rd sun gear T3, the 3rd gear ring Q3, the third line carrier J3, and the fourth planet row P4 includes 4th sun gear T4, the 4th gear ring Q4, fourth line carrier J4;
The input link 1 being connected with input shaft and output shaft respectively and output link 2;
First driving member 3, the second driving member 4, the 3rd driving member 5, the 4th driving member 6 and the 5th driving member 7 five driving members;
First brake Z1, second brake Z2, tetra- brakes of the 3rd brake Z3 and the 4th brake Z4;
Two clutches of first clutch C1 and second clutch C2;
The input link 1 connects the outer hub of the first sun gear T1, the outer hub of first clutch C1 and second clutch C2; The output link 2 connects the 4th sun gear T4 and the third line carrier J3;First driving member 3 connect the first gear ring Q1 and The interior hub of the first brake M1;The connection of second driving member 4 the first row carrier J1, the second gear ring Q2 and second brake M2 Interior hub;3rd driving member 5 connects the second planet carrier J2, the 3rd gear ring Q3, the 4th gear ring Q4, second clutch C2 The interior hub of interior hub and the 3rd brake M3;4th driving member 6 connection fourth line carrier J4 and the 4th brake M4's is interior Hub;5th driving member 7 connects the second sun gear T2, the interior hub of the 3rd sun gear T3 and first clutch C1.
Planetary gear in the first planet row P1, the second planet row P2, third planet row P3 and fourth planet row P4 Number is single star planet row, can simplify gearbox designs, mitigates weight, realizes lightweight requirements.
The k value of the first planet row P1, the second planet row P2, third planet row P3 and fourth planet row P4 is 1.5 ~2.5, the integrally-built compactedness of change speed gear box is facilitated implementation, the volume and weight of change speed gear box is reduced, and then is realized lightweight.
Embodiment:The planetary automatic transmission of this programme is applied to road vehicle.Wherein each planet row is arranged in order, respectively Connected using driving member between individual planet row, input shaft is connected with input link 1, generally the turbine wheel shaft of fluid torque-converter, For the power Jing fluid torque-converters of electromotor are reached variator.Output shaft is connected with output link 2, by transfer gear or difference Power is reached forward and backward bridge or left and right driving wheel by fast device.The variator is full symmetric relative to center of rotation, is saved in Fig. 1 The latter half of center of rotation is omited, has no longer been explained when below describing.
First planet row P1 includes the first sun gear T1, the first gear ring Q1 and tri- revolving parts of the first row carrier J1, first Sun gear T1 is connected with input link 1 with input power, can be braked by the first brake M1, and the first gear ring Q1 is so that the first row The rotating speed of input link 1 is carried out deceleration output as middle output by carrier J1.
Second planet row P2 includes the second sun gear T2, the second gear ring Q2 and tri- revolving parts of the second planet carrier J2, can be Reduction gear brakes gear ring Q2 so that the second planet carrier J2 is used as middle output by second sun by second brake M2 second The rotating speed of wheel T2 carries out deceleration output., or the second planet carrier J2 is braked by the 3rd brake M3 so that second too in speedup shelves The rotating speed of the second gear ring Q2 is carried out speedup output as middle output by sun wheel T2 in reverse gear.
Third planet row P3 includes the 3rd sun gear T3, the 3rd gear ring Q3 and tri- revolving parts of the third line carrier J3, can lead to Cross the 3rd brake M3 the 3rd gear ring Q3 is braked so that the rotating speed of the 3rd sun gear T3 is entered as output by the third line carrier J3 Row slows down and exports, or the rotating speed of the 3rd gear ring Q3 and the 3rd sun gear T3 is entered as middle output by fourth line carrier J4 Row slows down and exports.
Fourth planet row P4 includes the 4th sun gear T4, the 4th gear ring Q4 and tri- revolving parts of fourth line carrier J4, can lead to Cross the 4th brake M4 fourth line carrier J4 is braked so that the rotating speed of the 4th gear ring Q4 is entered as output by the 4th sun gear T4 Row speedup is exported.
First brake M1 is used for braking the first driving member 3, and second brake M2 is used for braking the second driving member 4, 3rd brake M3 is used for braking the 3rd driving member 5, and the 4th brake M4 is used for braking the 4th driving member 6.First clutch Device C1 is used for connecting input link 1 and the 5th driving member 7, and second clutch C2 is used for connecting input link 1 and the 3rd transmission Component 5.Brake and clutch are multiple-piece friction manipulation part, drive piston to be pressurizeed using hydraulic oil.The behaviour of each shelves Vertical scheme is realized as shown in table 1:
Table 1:7-speed automatic transmission implementation and corresponding gear ratio, a ratio illustrate table
In table, " o " represents that controls is combined.
It is described in detail referring to 1 pair of example of the invention of Fig. 1 and Biao, it should be noted that, transmission described herein Than referring to the ratio of input shaft rotating speed and output rotating speed, planet row k value refer to the gear ring number of teeth of planet row and the sun gear number of teeth it Than.
When first clutch C1 and the 4th brake M4 are combined, the 5th driving member 7 and the input structure as input shaft 1 integral-rotation of part, the 4th driving member 6 are braked, and realize one grade " 1st ".
When first clutch C1 and the 3rd brake M3 are combined, the 5th driving member 7 and the input structure as input shaft 1 integral-rotation of part, the 3rd driving member 5 are braked, and realize two grade " 2nds " less than one grade of " 1st " gear ratio.
When first clutch C1 and second brake M2 are combined, the 5th driving member 7 and the input structure as input shaft 1 integral-rotation of part, the second driving member 4 are braked, and realize the third gear " 3rd " less than two grades of " 2nd " gear ratios.
When first clutch C1 and the 4th brake M1 are combined, the 5th driving member 7 and the input structure as input shaft 1 integral-rotation of part, the first driving member 3 are braked, and realize the fourth gear " 4th " less than third gear " 3rd " gear ratio.
When first clutch C1 and second clutch C2 are combined, the 3rd driving member 5 and the 5th driving member 7 simultaneously with As 1 integral-rotation of input link of input shaft, five grade " 5th " less than fourth gear " 4th " gear ratio is realized.
When second clutch C2 and the first brake M1 are combined, the 3rd driving member 5 and the input structure as input shaft 1 integral-rotation of part, the first driving member 3 are braked, and realize six grade " 6ths " less than five grades of " 5th " gear ratios.
When second clutch C2 and second brake M2 are combined, the 3rd driving member 5 and the input structure as input shaft 1 integral-rotation of part, the second driving member 4 are braked, and realize seven grade " 7ths " less than six grades of " 6th " gear ratios.
When the first brake M1 and the 3rd brake M3 are combined, the first driving member 3 and the 3rd driving member 5 are braked, Realize reverse gear " R1 ".
When the first brake M1 and the 4th brake M4 are combined, the first driving member 3 and the 4th driving member 6 are braked, Realize reverse gear " R2 ".
Each shelves gear ratio is determined by the k value of four planet rows.For example, k1 ≈ 1.712, k2 ≈ 1.983,2.510 and of k3 ≈ During k3 ≈ 1.640, you can obtain each shelves gear ratio shown in table 1, between adjacent gear positions gear ratio than 1.153~1.841 it Between, obtain overall performance preferably ratio characteristic.
Four planet rows in the present embodiment are the simple planet row of single star, and k value is in the range of 1.5~2.5, can make four The radial dimension of individual planet row is less, meanwhile, obtain overall performance preferably ratio characteristic.
Above-described embodiment is only a preferred embodiment of the present invention, and in for limiting protection scope of the present invention, it is all Deformation, modification or equivalent for being made on the basis of technical scheme etc., all should fall into the protection model of the present invention Enclose.

Claims (3)

1. a kind of seven planetary automatic transmission is kept off, it is characterised in that:Including
First planet row (P1), the second planet row (P2), third planet row (P3) and fourth planet row's (P4) four planet rows, institute Stating first planet row (P1) includes the first sun gear (T1), the first gear ring (Q1), the first row carrier (J1), second planet row (P2) the second sun gear (T2), the second gear ring (Q2), the second planet carrier (J2) are included, third planet row (P3) includes the 3rd Sun gear (T3), the 3rd gear ring (Q3), the third line carrier (J3), fourth planet row (P4) include the 4th sun gear (T4), 4th gear ring (Q4), fourth line carrier (J4);
The input link (1) being connected with input shaft and output shaft respectively and output link (2);
First driving member (3), the second driving member (4), the 3rd driving member (5), the 4th driving member (6) and the 5th transmission (7) five driving members of component;
First brake (Z1), second brake (Z2), the 3rd brake (Z3) and the 4th four brakes of brake (Z4);
Two clutches of first clutch (C1) and second clutch (C2);
Described input link (1) connects the first sun gear (T1), the outer hub of first clutch (C1) and second clutch (C2) Outer hub;Described output link (2) connect the 4th sun gear (T4) and the third line carrier (J3);Described first driving member (3) connect Connect the interior hub of the first gear ring (Q1) and the first brake (M1);Described second driving member (4) connection the first row carrier (J1), the The interior hub of two gear rings (Q2) and second brake (M2);3rd driving member (5) connects the second planet carrier (J2), the 3rd tooth The interior hub of circle (Q3), the 4th gear ring (Q4), the interior hub of second clutch (C2) and the 3rd brake (M3);The 4th transmission structure Part (6) connection fourth line carrier (J4) and the interior hub of the 4th brake (M4);5th driving member (7) connects second sun The interior hub of wheel (T2), the 3rd sun gear (T3) and first clutch (C1).
2. according to claim 1 seven planetary automatic transmission is kept off, it is characterised in that:First planet row (P1), the Planetary gear number in two planet rows (P2), third planet row (P3) and fourth planet row (P4) is single star planet row.
3. according to claim 1 seven planetary automatic transmission is kept off, it is characterised in that:First planet row (P1), the The k value of two planet rows (P2), third planet row (P3) and fourth planet row (P4) is 1.5~2.5.
CN201611169019.4A 2016-12-16 2016-12-16 Seven-gear planetary automatic transmission Pending CN106523627A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611169019.4A CN106523627A (en) 2016-12-16 2016-12-16 Seven-gear planetary automatic transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611169019.4A CN106523627A (en) 2016-12-16 2016-12-16 Seven-gear planetary automatic transmission

Publications (1)

Publication Number Publication Date
CN106523627A true CN106523627A (en) 2017-03-22

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110500390A (en) * 2019-07-15 2019-11-26 中国北方车辆研究所 One kind seven keeps off planetary automatic transmission
CN110594371A (en) * 2019-09-24 2019-12-20 陕西法士特齿轮有限责任公司 Seven-gear hydraulic automatic transmission
CN110608270A (en) * 2019-09-24 2019-12-24 陕西法士特齿轮有限责任公司 Hydraulic automatic transmission
CN110805666A (en) * 2019-11-26 2020-02-18 贵州凯星液力传动机械有限公司 Seven-gear planetary gear transmission
CN113108040A (en) * 2021-03-29 2021-07-13 北方汤臣传动科技有限公司 Eight-gear automatic transmission of mining truck integrating hydraulic retarber arranged in parallel shafts
CN115853977A (en) * 2023-02-22 2023-03-28 潍柴动力股份有限公司 Transmission system and transmission method

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CN102913597A (en) * 2012-10-16 2013-02-06 中国北方车辆研究所 Seven-level planet automatic speed changer
CN103511565A (en) * 2013-10-17 2014-01-15 中国北方车辆研究所 Automatic six-gear planetary transmission
CN104011431A (en) * 2011-12-19 2014-08-27 艾里逊变速箱公司 Automatic Transmission With Improved Gear Arrangement
CN104595436A (en) * 2015-02-13 2015-05-06 中国北方车辆研究所 Seven-gear planetary transmission for automatic transmission case
CN104728368A (en) * 2015-02-13 2015-06-24 中国北方车辆研究所 Six-gear planetary automatic transmission

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4228461B2 (en) * 1999-03-19 2009-02-25 アイシン精機株式会社 Transmission
CN104011431A (en) * 2011-12-19 2014-08-27 艾里逊变速箱公司 Automatic Transmission With Improved Gear Arrangement
CN102913597A (en) * 2012-10-16 2013-02-06 中国北方车辆研究所 Seven-level planet automatic speed changer
CN103511565A (en) * 2013-10-17 2014-01-15 中国北方车辆研究所 Automatic six-gear planetary transmission
CN104595436A (en) * 2015-02-13 2015-05-06 中国北方车辆研究所 Seven-gear planetary transmission for automatic transmission case
CN104728368A (en) * 2015-02-13 2015-06-24 中国北方车辆研究所 Six-gear planetary automatic transmission

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110500390A (en) * 2019-07-15 2019-11-26 中国北方车辆研究所 One kind seven keeps off planetary automatic transmission
CN110594371A (en) * 2019-09-24 2019-12-20 陕西法士特齿轮有限责任公司 Seven-gear hydraulic automatic transmission
CN110608270A (en) * 2019-09-24 2019-12-24 陕西法士特齿轮有限责任公司 Hydraulic automatic transmission
CN110594371B (en) * 2019-09-24 2024-04-09 陕西法士特齿轮有限责任公司 Seven-gear hydraulic automatic transmission
CN110608270B (en) * 2019-09-24 2024-05-14 陕西法士特齿轮有限责任公司 Hydraulic automatic transmission
CN110805666A (en) * 2019-11-26 2020-02-18 贵州凯星液力传动机械有限公司 Seven-gear planetary gear transmission
CN113108040A (en) * 2021-03-29 2021-07-13 北方汤臣传动科技有限公司 Eight-gear automatic transmission of mining truck integrating hydraulic retarber arranged in parallel shafts
CN115853977A (en) * 2023-02-22 2023-03-28 潍柴动力股份有限公司 Transmission system and transmission method
CN115853977B (en) * 2023-02-22 2023-05-23 潍柴动力股份有限公司 Transmission system and transmission method

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Application publication date: 20170322