CN110439975A - A kind of eight-gear planetary automatic speed changer - Google Patents
A kind of eight-gear planetary automatic speed changer Download PDFInfo
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- CN110439975A CN110439975A CN201910633299.7A CN201910633299A CN110439975A CN 110439975 A CN110439975 A CN 110439975A CN 201910633299 A CN201910633299 A CN 201910633299A CN 110439975 A CN110439975 A CN 110439975A
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- connecting elements
- planet row
- brake
- planet
- clutch
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
- F16H3/62—Gearings having three or more central gears
- F16H3/66—Gearings having three or more central gears composed of a number of gear trains without drive passing from one train to another
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
- F16H47/06—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the hydrokinetic type
- F16H47/08—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the hydrokinetic type the mechanical gearing being of the type with members having orbital motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02039—Gearboxes for particular applications
- F16H2057/02043—Gearboxes for particular applications for vehicle transmissions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02086—Measures for reducing size of gearbox, e.g. for creating a more compact transmission casing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02091—Measures for reducing weight of gearbox
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
- F16H2200/006—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising eight forward speeds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/0082—Transmissions for multiple ratios characterised by the number of reverse speeds
- F16H2200/0086—Transmissions for multiple ratios characterised by the number of reverse speeds the gear ratios comprising two reverse speeds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
- F16H2200/2012—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with four sets of orbital gears
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
- F16H2200/2046—Transmissions 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 present invention provides a kind of eight-gear planetary automatic speed changers of vehicle drive system.The speed changer includes planet row, be mounted on both ends respectively with input shaft, export axis connection input link and output link, connecting elements, brake and clutch, there are four the planet rows, there are five connecting elements, there are four brakes, clutch have two.Compared with prior art, automatic transmission of the invention realizes eight forward gears and two reverses gear, gear range is wide using the scheme of four planet rows, four brakes and two clutches.The present invention is easy to implement cramped construction, reduces the volume and weight of automatic transmission.
Description
Technical field
The invention belongs to system of vehicle transmission technical fields, and in particular to a kind of eight-gear planetary automatic speed changer of road vehicle.
Background technique
As road vehicle planetary automatic transmission, the power such as internal combustion engine reach planetary automatic speed-changing through fluid torque-converter
The input shaft of device exports power from output shaft, and reach left and right driving wheel through differential mechanism after current shift speed change, and becomes
Fast device is largely made of multiple planet rows, brake and clutch.Currently, the road vehicle of mainstream is become automatically with seven gear planets
The gear range of fast device is small, between transmission ratio than uneven, for this purpose, need to find a kind of than current planetary automatic transmission performance
More preferably eight-gear planetary automatic speed changer.
Summary of the invention
In view of this, the automatic transmission utilizes four planets the present invention provides a kind of eight-gear planetary automatic speed changer
Row, two clutches and four brakes realize eight forward gears and two reverse gear, and gear range is big, than equal between transmission ratio
It is even, the requirement of heavy vehicle can be met.
A kind of eight-gear planetary automatic speed changer, including planet row, be mounted on both ends respectively with input shaft, output axis connection
Input link 1 and output link 2, connecting elements, brake and clutch；It is characterized in that, there are four the planet rows, respectively
For planet row PGS1, planet row PGS2, planet row PGS3 and planet row PGS4；There are five connecting elements, respectively connecting elements
3, connecting elements 4, connecting elements 5, connecting elements 6 and connecting elements 7；There are four brakes, respectively brake B1, brake
B2, brake B3 and brake B4；Clutch has two, respectively clutch C1 and clutch C2.
Sun gear S1, planet carrier CA1 and the gear ring R1 of the planet row PGS1 respectively with input link 1, connecting elements 4 and
Connecting elements 3 connects；
Sun gear S2, planet carrier CA2 and the gear ring R2 of the planet row PGS2 respectively with input link 1, connecting elements 5 and
Connecting elements 4 connects；
Sun gear S3, planet carrier CA3 and the gear ring R3 of the planet row PGS3 respectively with connecting elements 7, connecting elements 6 and
Connecting elements 5 connects；
Sun gear S4, planet carrier CA4 and the gear ring R4 of the planet row PGS4 respectively with connecting elements 5, connecting elements 6 and
Output link 2 connects；
The input link 1 connects the sun gear S1 of planet row PGS1, the sun gear S2 of planet row PGS2, clutch C1
The interior hub of outer hub and clutch C2；
The output link 2 connects the gear ring R4 of planet row PGS4；
The connecting elements 3 connects the interior hub of the gear ring R1 and brake B1 of planet row PGS1；
The connecting elements 4 connects the gear ring R2's and brake B2 of the planet carrier CA1 of planet row PGS1, planet row PGS2
Interior hub；
The connecting elements 5 connects the planet carrier CA2 of planet row PGS2, the gear ring R3 of planet row PGS3, planet row PGS4
Sun gear S4 and brake B3 interior hub；
The connecting elements 6 connects the planet carrier CA3 of planet row PGS3, the planet carrier CA4 of planet row PGS4, brake B4
Interior hub and clutch C2 outer hub；
The connecting elements 7 connects the interior hub of the sun gear S3 and clutch C1 of planet row PGS3；
The brake B1 is used for brake attachment member 3；
The brake B2 is used for brake attachment member 4；
The brake B3 is used for brake attachment member 5；
The brake B4 is used for brake attachment member 6；
The clutch C1 connection input link 1 and connecting elements 7；
The clutch C2 connection connecting elements 6 and input link 1.
Beneficial effect
Compared with prior art, the present invention have it is following the utility model has the advantages that
A kind of eight-gear planetary automatic speed changer provided by the invention, using four planet rows, four brakes and two from
The scheme of clutch realizes that eight forward gears, gear range can reach 12.276.There are three the k values of planet row in 1.6~2.0 models
In enclosing, it is easy to implement cramped construction, reduces the volume and weight of automatic transmission.
Detailed description of the invention
Fig. 1 is each member connection schematic diagram of eight-gear planetary automatic speed changer of the invention, and PGS1~PGS4 is in figure
Four planet rows, S1~S4 are four sun gears, and CA1~CA4 is four planet carriers, and R1~R4 is four gear rings, and B1~B4 is
Four brakes, C1~C2 are two clutches, 1 are input link, 2 are output link, 3~7 are connecting elements.
Specific embodiment
To keep the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to tool of the invention
Body embodiment is described in detail.
Eight-gear planetary automatic speed changer provided by the invention is suitable for vehicle drive system.Wherein, each planet row is by suitable
Sequence arranges, and is connected between each planet row using connecting elements, and input shaft is connected with input link 1, generally fluid torque-converter
Turbine wheel shaft, for the power of engine to be reached planetary automatic transmission through fluid torque-converter.Output shaft and output link 2 connect
It connects, power is reached by forward and backward bridge or left and right driving wheel by transfer gear or differential mechanism.The planetary automatic transmission is relative to rotation
Turn center be it is full symmetric, the lower half portion of rotation center is omitted in Fig. 1, no longer makes an explanation when being described below.
Eight-gear planetary automatic speed changer as shown in Figure 1, including planet row, be mounted on both ends respectively with input shaft, output
Input link 1, the output link 2 of axis connection, connecting elements, brake and clutch.There are four the planet rows, respectively goes
Star arranges PGS1, planet row PGS2, planet row PGS3 and planet row PGS4；There are five connecting elements, respectively connecting elements 3, company
Connection member 4, connecting elements 5, connecting elements 6 and connecting elements 7；There are four brakes, respectively brake B1, brake B2,
Brake B3 and brake B4；Clutch has two, respectively clutch C1 and clutch C2.
Each planet row respectively includes sun gear, planet carrier and gear ring.
Sun gear S1, planet carrier CA1 and the gear ring R1 of the planet row PGS1 respectively with input link 1, connecting elements 4 and
Connecting elements 3 connects；
Sun gear S2, planet carrier CA2 and the gear ring R2 of the planet row PGS2 respectively with input link 1, connecting elements 5 and
Connecting elements 4 connects；
Sun gear S3, planet carrier CA3 and the gear ring R3 of the planet row PGS3 respectively with connecting elements 7, connecting elements 6 and
Connecting elements 5 connects；
Sun gear S4, planet carrier CA4 and the gear ring R4 of the planet row PGS4 respectively with connecting elements 5, connecting elements 6 and
Output link 2 connects；
The input link 1 connects the sun gear S1 of planet row PGS1, the sun gear S2 of planet row PGS2, clutch C1
The interior hub of outer hub and clutch C2；
The output link 2 connects the gear ring R4 of planet row PGS4；
The connecting elements 3 connects the interior hub of the gear ring R1 and brake B1 of planet row PGS1；
The connecting elements 4 connects the gear ring R2's and brake B2 of the planet carrier CA1 of planet row PGS1, planet row PGS2
Interior hub；
The connecting elements 5 connects the planet carrier CA2 of planet row PGS2, the gear ring R3 of planet row PGS3, planet row PGS4
Sun gear S4 and brake B3 interior hub；
The connecting elements 6 connects the planet carrier CA3 of planet row PGS3, the planet carrier CA4 of planet row PGS4, brake B4
Interior hub and clutch C2 outer hub；
The connecting elements 7 connects the interior hub of the sun gear S3 and clutch C1 of planet row PGS3；
The brake B1 is used for brake attachment member 3；
The brake B2 is used for brake attachment member 4；
The brake B3 is used for brake attachment member 5；
The brake B4 is used for brake attachment member 6；
The clutch C1 connection input link 1 and connecting elements 7；
The clutch C2 connection connecting elements 6 and input link 1.
The planet row PGS1, planet row PGS2, planet row PGS3 and planet row PGS4 are single star planet row.
Brake B1~B4, clutch C1 and C2 are generally multiple-piece friction manipulation part, using hydraulic oil drive piston into
Row pressurization.The manipulation schemes respectively kept off are as shown in table 1.
1 eight-gear planetary automatic speed changer of table respectively keeps off implementation and corresponding transmission ratio, compares schematic table
"○" indicates that controls in conjunction with being described in detail below with reference to 1 pair of example of the invention of Fig. 1 and table, needs in table
Bright, transmission ratio described herein refers to that the ratio between input shaft rotating speed and output shaft revolving speed, planet row k value refer to the tooth of planet row
Enclose the ratio between the number of teeth and the sun gear number of teeth.
When clutch C1 and brake B4 is combined, input link 1 and connecting elements 7 are rotated integrally, and connecting elements 6 is made
It is dynamic, realize a gear " 1st ".
When clutch C1 and brake B3 is combined, input link 1 and connecting elements 7 are rotated integrally, and connecting elements 5 is made
It is dynamic, it realizes second gear " 2nd ".
When clutch C1 and brake B2 is combined, input link 1 and connecting elements 7 are rotated integrally, and connecting elements 4 is made
It is dynamic, realize three gears " 3rd ".
When clutch C1 and brake B1 is combined, input link 1 and connecting elements 7 are rotated integrally, and connecting elements 3 is made
It is dynamic, realize four gears " 4th ".
When clutch C1 and clutch C2 are combined, input link 1 and connecting elements 7 are rotated integrally, connecting elements 6 and defeated
Enter the integral-rotation of component 1, realizes five gears " 5th ".
When clutch C2 and brake B1 is combined, connecting elements 7 and input link 1 are rotated integrally, and connecting elements 3 is made
It is dynamic, realize six gears " 6th ".
When clutch C2 and brake B2 is combined, connecting elements 7 and input link 1 are rotated integrally, and connecting elements 4 is made
It is dynamic, realize seven gears " 7th ".
When clutch C2 and brake B3 is combined, connecting elements 7 and input link 1 are rotated integrally, and connecting elements 5 is made
It is dynamic, realize eight gears " 8th ".
When brake B2 and brake B4 is combined, connecting elements 4 and connecting elements 6 are braked simultaneously, realize a gear
“Rev1”。
When brake B1 and brake B4 is combined, connecting elements 3 and connecting elements 6 are braked simultaneously, realize second gear
“Rev2”。
Each gear transmission ratio is determined by the k value of four planet rows.For example, k1 ≈ 1.724, k2 ≈ 1.989, k3 ≈ 4.650, k4
When ≈ 1.640, it can be obtained and respectively keep off transmission ratio shown in table 1, total gear range (7.626/0.621) of forward gear reaches
12.276 obtaining wider gear range.The k value of planet row PGS1, planet row PGS2 and planet row PGS4 1.6~
In 2.0 ranges, the radial dimension of three planet rows can be made smaller, be easy to implement cramped construction, reduce the body of automatic transmission
Long-pending and weight.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be carried out, such as: adjustment planet row
Order of placement, change brake position, change clutch connector, planet row and change into the simple planet row of double star or will be simple
Single planetary row becomes compound planetary row etc., and those modifications and variations should also be regarded as the protection scope of the present invention.
Claims (3)
1. a kind of eight-gear planetary automatic speed changer, including planet row, be mounted on both ends respectively with input shaft, output axis connection it is defeated
Entering component (1), output link (2), connecting elements, brake and clutch, it is characterised in that: there are four the planet rows, point
It Wei not planet row PGS1, planet row PGS2, planet row PGS3 and planet row PGS4；There are five the connecting elements, respectively connects
Connection member (3), connecting elements (4), connecting elements (5), connecting elements (6) and connecting elements (7)；There are four the brakes,
Respectively brake B1, brake B2, brake B3 and brake B4；The clutch has two, respectively clutch C1 and
Clutch C2；
Sun gear S1, planet carrier CA1 and the gear ring R1 of the planet row PGS1 respectively with input link (1), connecting elements (4) and
Connecting elements (3) connection；
Sun gear S2, planet carrier CA2 and the gear ring R2 of the planet row PGS2 respectively with input link (1), connecting elements (5) and
Connecting elements (4) connection；
Sun gear S3, planet carrier CA3 and the gear ring R3 of the planet row PGS3 respectively with connecting elements (7), connecting elements (6) and
Connecting elements (5) connection；
Sun gear S4, planet carrier CA4 and the gear ring R4 of the planet row PGS4 respectively with connecting elements (5), connecting elements (6) and
Output link (2) connection；
The input link (1) the connection sun gear S1 of planet row PGS1, the sun gear S2 of planet row PGS2, clutch C1 it is outer
The interior hub of hub and clutch C2；
The gear ring R4 of output link (2) the connection planet row PGS4；
The interior hub of the gear ring R1 and brake B1 of connecting elements (3) the connection planet row PGS1；
The connecting elements (4) connects the interior of the gear ring R2 and brake B2 of the planet carrier CA1 of planet row PGS1, planet row PGS2
Hub；
The connecting elements (5) the connection planet carrier CA2 of planet row PGS2, the gear ring R3 of planet row PGS3, planet row PGS4
The interior hub of sun gear S4 and brake B3；
The connecting elements (6) the connection planet carrier CA3 of planet row PGS3, the planet carrier CA4 of planet row PGS4, brake B4
The outer hub of interior hub and clutch C2；
The interior hub of the sun gear S3 and clutch C1 of connecting elements (7) the connection planet row PGS3；
The brake B1 is used for brake attachment member (3)；
The brake B2 is used for brake attachment member (4)；
The brake B3 is used for brake attachment member (5)；
The brake B4 is used for brake attachment member (6)；
The clutch C1 connection input link (1) and connecting elements (7)；
The clutch C2 connection connecting elements (6) and input link (1).
2. eight-gear planetary automatic speed changer as described in claim 1, it is characterised in that: the planet row PGS1, planet row
PGS2, planet row PGS3 and planet row PGS4 are single star planet row.
3. eight-gear planetary automatic speed changer as described in claim 1, it is characterised in that:
The planet row includes sun gear, planet carrier and gear ring；
The input shaft is the turbine wheel shaft of fluid torque-converter, and the power of engine is reached planetary automatic speed-changing through fluid torque-converter
Device；
The brake and clutch are multiple-piece friction manipulation part, are pressurizeed and are combined using hydraulic oil driving piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910633299.7A CN110439975A (en) | 2019-07-15 | 2019-07-15 | A kind of eight-gear planetary automatic speed changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910633299.7A CN110439975A (en) | 2019-07-15 | 2019-07-15 | A kind of eight-gear planetary automatic speed changer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110439975A true CN110439975A (en) | 2019-11-12 |
Family
ID=68430237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910633299.7A Pending CN110439975A (en) | 2019-07-15 | 2019-07-15 | A kind of eight-gear planetary automatic speed changer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110439975A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984060A (en) * | 2021-04-27 | 2021-06-18 | 北京航空航天大学 | Eight-front two-reverse planetary gear automatic 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 |
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| CN104565238A (en) * | 2014-12-26 | 2015-04-29 | 燕山大学 | 8-gear automatic transmission |
| CN104595435A (en) * | 2014-12-26 | 2015-05-06 | 燕山大学 | Eight-gear transmission |
| CN106402293A (en) * | 2016-09-30 | 2017-02-15 | 中国北方车辆研究所 | Eight-gear automatic planetary transmission |
| CN106523628A (en) * | 2016-12-16 | 2017-03-22 | 贵州凯星液力传动机械有限公司 | Eight-gear planetary automatic transmission |
| CN108105346A (en) * | 2017-12-22 | 2018-06-01 | 贵州凯星液力传动机械有限公司 | A kind of heavy vehicle or oil field eight-gear planetary automatic speed changer |
-
2019
- 2019-07-15 CN CN201910633299.7A patent/CN110439975A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104565238A (en) * | 2014-12-26 | 2015-04-29 | 燕山大学 | 8-gear automatic transmission |
| CN104595435A (en) * | 2014-12-26 | 2015-05-06 | 燕山大学 | Eight-gear transmission |
| CN106402293A (en) * | 2016-09-30 | 2017-02-15 | 中国北方车辆研究所 | Eight-gear automatic planetary transmission |
| CN106523628A (en) * | 2016-12-16 | 2017-03-22 | 贵州凯星液力传动机械有限公司 | Eight-gear planetary automatic transmission |
| CN108105346A (en) * | 2017-12-22 | 2018-06-01 | 贵州凯星液力传动机械有限公司 | A kind of heavy vehicle or oil field eight-gear planetary automatic speed changer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112984060A (en) * | 2021-04-27 | 2021-06-18 | 北京航空航天大学 | Eight-front two-reverse planetary gear automatic transmission |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191112 |
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| RJ01 | Rejection of invention patent application after publication |