CN104728416A - Dual clutch transmission with improved oil pump arrangement structure - Google Patents
Dual clutch transmission with improved oil pump arrangement structure Download PDFInfo
- Publication number
- CN104728416A CN104728416A CN201510138465.8A CN201510138465A CN104728416A CN 104728416 A CN104728416 A CN 104728416A CN 201510138465 A CN201510138465 A CN 201510138465A CN 104728416 A CN104728416 A CN 104728416A
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- Prior art keywords
- oil
- oil pump
- pump
- double
- gear
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- 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
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Classifications
-
- 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
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0441—Arrangements of pumps
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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
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0436—Pumps
-
- 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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H61/0025—Supply of control fluid; Pumps therefore
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
A dual clutch transmission with an improved oil pump arrangement structure comprises a transmission box and an oil pumping component, wherein a cavity in one side of the transmission box is a dual clutch cavity, a cavity in the other side of the transmission box is a gear drive system cavity, the oil pumping component is arranged on the side wall of the transmission box and is composed of an oil pump and a motor driving the oil pump, an oil inlet and an oil outlet are formed in the oil pump, the oil inlet is communicated with an oil tank, an oil duct corresponding to the oil outlet is formed in the side wall of the transmission box and is communicated with the oil outlet of the oil pump, one end of the oil duct is communicated with the dual clutch cavity, and the other end of the oil duct is communicated with the gear drive system cavity. The dual clutch transmission is lubricated and provided with power through the external oil pumping component.
Description
Technical field
The invention belongs to the field of structural design of speed changer, be specifically related to a kind of double-clutch speed changer improving oil pump arrangement structure.
Background technique
Developing rapidly in the last few years along with China's automobile industry, the requirement of people to automotive performance is more and more higher, and the performance of speed changer to automobile plays vital effect.Oil pump is the important component part of speed changer, and the oil in fuel tank is transported in speed changer by the oil pump obtaining power, for the mechanical part in speed changer provides lubricating oil, realizes the operation of gearshift fluid power, provides oil liquid pressure to hydraulic control system.
In current double-clutch speed changer, the arrangement of oil pump is mainly divided into the mode that input shaft top is arranged and input shaft end is arranged, adds the axial dimension of speed changer.In these arrangements, oil pump power is all directly provided by motor simultaneously, occupies the output energy consumption of motor, makes the transmission efficiency of speed changer directly reduce 10%.Internal gear-meshing oil pump many employings involute gear pump that present speed changer uses, cycloid gear pump and circular-arc gear pump, discharge capacity, flow pulsation etc. all can not reach best requirement.
Summary of the invention
Arrange for solving existing transmission oil pump the defect existed, the present invention devises a kind of double-clutch speed changer improving oil pump arrangement structure.
Improve a double-clutch speed changer for oil pump arrangement structure, comprise mission case 1, pump oil assembly; One side cavity of described mission case 1 is double clutch chamber 2, and opposite side chamber is gear train assembly chamber 6, and described pump oil assembly is located on the sidewall of mission case 1, and pump oil assembly is made up of the motor 5 of oil pump 3 and driving oil pump 3; Described oil pump 3 is provided with filler opening 12, oil outlet 14, and filler opening 12 is communicated with fuel tank;
Described mission case 1 sidewall corresponding with oil pump 3 offers oil duct, and oil duct is communicated with the oil outlet 14 of oil pump 3; Double clutch chamber 2 is led in one end of described oil duct, and the other end of oil duct leads to gear train assembly chamber 6.
Described oil pump 3 is located on mission case 1 sidewall between double clutch chamber 2 and gear train assembly chamber 6, and on mission case 1, radial protrusion has the support block 4 corresponding with oil pump 3, and the middle part of support block 4 is axially arranged with mounting hole;
One end of described support block 4 and the pump housing 11 of oil pump 3 are connected, and the other end cooperation of the pump housing 11 is provided with protecgulum 10; One end of described oil pump input shaft 19 is positioned at the pump housing 11, and the other end of oil pump input shaft 19 is positioned at the mounting hole of support block 4 and oil pump input shaft 19 end being positioned at mounting hole is provided with driving hole;
The other end of described support block 4 coordinates and is provided with motor 5, motor output shaft 24 coordinate put in support block 4 mounting hole in and by the driving hole connection for transmission of key with oil pump input shaft 19, driving oil pump input shaft 19 rotates.
Described oil pump input shaft 19 is fixed on by clutch shaft bearing 20 in the mounting hole of support block 4, and described motor output shaft 24 is fixed in the mounting hole of support block 4 by the second bearing 23.
The described oil pump input shaft 19 being positioned at mounting hole is provided with large baffle ring 18, and the side of large baffle ring 18 contacts with clutch shaft bearing 20, opposite side contacts with the pump housing 11, and large baffle ring 18 realizes the axially locating of clutch shaft bearing 20;
The described motor output shaft 24 being positioned at mounting hole coordinates and is provided with oil sealing 21, and motor output shaft 24 between oil sealing 21 and the second bearing 23 is provided with little baffle ring 22, axially locating that little baffle ring 22 realizes the second bearing 23.
Described oil pump 3 adopts multiple tooth poor cycloidal gear oil pump; Be provided with the driving gear 8 in internal messing, driven gear 9 in the pump housing 11 of oil pump 3, and between driving gear 8 and driven gear 9, cooperation is provided with swing link 7;
The described pump housing 11 is respectively equipped with filler opening 12, return opening 13 at driving gear 8 and engaging-in oil suction place of driven gear 9, and filler opening 12 and return opening 13 are connected with fuel tank respectively by the inflow pipeline 15 of protecgulum 10, oil returning tube 16;
The described pump housing 11 is provided with oil outlet 14 at driving gear 8 and oil extraction place of nibbling out of driven gear 9, and oil outlet 14 is communicated with the oil duct on mission case 1 sidewall by the flowline 17 of protecgulum 10, makes fluid enter double clutch chamber 2 and gear train assembly chamber 6 respectively by first point of oil duct, 25, second point of oil duct 26 of oil duct and carries out lubricating and providing power;
Described motor 5 adopts direct current type permagnetic synchronous motor, and motor 5 provides power by independent storage battery.
The number of teeth of described driving gear 8 is 8-10, and the number of teeth of driven gear 9 is 10-13.
Many 2 to 3 of the number of teeth of the gear ratio driving gear 8 of described driven gear 9.
Advantageous Effects of the present invention is embodied in following several aspect:
(1), the present invention by oil pump is arranged on double clutch wall box, effectively reduce the axial dimension of speed changer at least 5%, make the structure of speed changer compacter, be conducive to the installation of speed changer, configuration.
(2), the present invention by drive motor Direct driver oil pump, the power of double-clutch speed changer oil pump is provided by drive motor completely, reduces the load loss of motor, thus can effective energy efficient, improve the transmission efficiency of speed changer 10%.
(3), the present invention adopts the permagnetic synchronous motor Direct driver oil pump of direct current, and the power of motor is provided by storage battery, makes the rotating speed of oil pump comparatively stable, thus can provide comparatively stable oil pressure.
(4), on gearbox sidewall of the present invention radial protrusion has support block, and support block uses as the bonnet of oil pump, and oil pump have employed detachable protecgulum, the convenient maintenance to oil pump, detection.
(5), the mating part that are connected with oil pump as motor of support block of the present invention, the joint of motor and oil pump is effectively protected, and is provided with oil sealing in the mounting hole of support block, avoid the inner fluid of oil pump and enter motor.
(6), oil pump of the present invention adopts multiple tooth poor cycloidal gear oil pump, and many 2 to 3 of the driven gear gear ratio driving gear number of teeth, and gear oil pump is had, and flow is large, flow pulsation is little, compact appearance and volumetric efficiency advantages of higher.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is speed changer of the present invention and oil pump installation position partial sectional view, and oil pump is that the rotation being benchmark with C-C in Fig. 4 is cutd open.
Fig. 3 is the partial enlarged drawing of I in Fig. 2.
Fig. 4 is the partial view of A-A in Fig. 3.
Fig. 5 is the partial view of B-B in Fig. 3.
Sequence number in upper figure: mission case 1, double clutch chamber 2, oil pump 3, support block 4, motor 5, gear train assembly chamber 6, swing link 7, driving gear 8, driven gear 9, protecgulum 10, the pump housing 11, filler opening 12, return opening 13, oil outlet 14, inflow pipeline 15, oil returning tube 16, flowline 17, large baffle ring 18, oil pump input shaft 19, clutch shaft bearing 20, oil sealing 21, little baffle ring 22, second bearing 23, motor output shaft 24, first point of oil duct, 25, second point of oil duct 26.
Embodiment
embodiment 1:see Fig. 1, Fig. 2, Fig. 3, a kind of double-clutch speed changer improving oil pump arrangement structure, comprises mission case 1, pump oil assembly; One side cavity of described mission case 1 is double clutch chamber 2, and opposite side chamber is gear train assembly chamber 6, and described pump oil assembly is located on the sidewall of mission case 1, and pump oil assembly is made up of the motor 5 of oil pump 3 and driving oil pump 3; Described oil pump 3 is provided with filler opening 12, oil outlet 14, and filler opening 12 is communicated with fuel tank;
Described mission case 1 sidewall corresponding with oil pump 3 offers oil duct, and oil duct is communicated with the oil outlet 14 of oil pump 3; Double clutch chamber 2 is led in one end of described oil duct, and the other end of oil duct leads to gear train assembly chamber 6.
See Fig. 4, Fig. 5, described oil pump 3 adopts multiple tooth poor cycloidal gear oil pump; Be provided with the driving gear 8 in internal messing, driven gear 9 in the pump housing 11 of oil pump 3, and between driving gear 8 and driven gear 9, cooperation is provided with swing link 7;
The described pump housing 11 is respectively equipped with filler opening 12, return opening 13 at driving gear 8 and engaging-in oil suction place of driven gear 9, and filler opening 12 and return opening 13 are connected with fuel tank respectively by the inflow pipeline 15 of protecgulum 10, oil returning tube 16;
The described pump housing 11 is provided with oil outlet 14 at driving gear 8 and oil extraction place of nibbling out of driven gear 9, and oil outlet 14 is communicated with the oil duct on mission case 1 sidewall by the flowline 17 of protecgulum 10, makes fluid enter double clutch chamber 2 and gear train assembly chamber 6 respectively by first point of oil duct, 25, second point of oil duct 26 of oil duct and carries out lubricating and providing power;
Described motor 5 adopts direct current type permagnetic synchronous motor, and motor 5 provides power by independent storage battery.
The number of teeth of the driving gear 8 of described oil pump 3 is 9, and the number of teeth of driven gear 9 is 11.
embodiment 2: see Fig. 2, Fig. 3, described oil pump 3 is located on mission case 1 sidewall between double clutch chamber 2 and gear train assembly chamber 6, and on mission case 1, radial protrusion has the support block 4 corresponding with oil pump 3, and the middle part of support block 4 is axially arranged with mounting hole;
One end of described support block 4 and the pump housing 11 of oil pump 3 are connected, and the other end cooperation of the pump housing 11 is provided with protecgulum 10; One end of described oil pump input shaft 19 is positioned at the pump housing 11, and the other end of oil pump input shaft 19 is positioned at the mounting hole of support block 4 and oil pump input shaft 19 end being positioned at mounting hole is provided with driving hole;
The other end of described support block 4 coordinates and is provided with motor 5, motor output shaft 24 coordinate put in support block 4 mounting hole in and by the driving hole connection for transmission of key with oil pump input shaft 19, driving oil pump input shaft 19 rotates.
Described oil pump input shaft 19 is fixed on by clutch shaft bearing 20 in the mounting hole of support block 4, and described motor output shaft 24 is fixed in the mounting hole of support block 4 by the second bearing 23.
The described oil pump input shaft 19 being positioned at mounting hole is provided with large baffle ring 18, and the side of large baffle ring 18 contacts with clutch shaft bearing 20, opposite side contacts with the pump housing 11, and large baffle ring 18 realizes the axially locating of clutch shaft bearing 20;
The described motor output shaft 24 being positioned at mounting hole coordinates and is provided with oil sealing 21, and motor output shaft 24 between oil sealing 21 and the second bearing 23 is provided with little baffle ring 22, axially locating that little baffle ring 22 realizes the second bearing 23.All the other structures are with embodiment 1.
Claims (7)
1. improve a double-clutch speed changer for oil pump arrangement structure, comprise mission case (1), pump oil assembly; One side cavity of described mission case (1) is double clutch chamber (2), opposite side chamber is gear train assembly chamber (6), it is characterized in that: described pump oil assembly is located on the sidewall of mission case (1), and pump oil assembly is made up of the motor (5) of oil pump (3) and driving oil pump (3); Described oil pump (3) is provided with filler opening (12), oil outlet (14), and filler opening (12) is communicated with fuel tank;
Described mission case (1) sidewall corresponding with oil pump (3) offers oil duct, and oil duct is communicated with the oil outlet (14) of oil pump (3); Double clutch chamber (2) is led in one end of described oil duct, and the other end of oil duct leads to gear train assembly chamber (6).
2. a kind of double-clutch speed changer improving oil pump arrangement structure according to claim 1, it is characterized in that: described oil pump (3) is located on mission case (1) sidewall between double clutch chamber (2) and gear train assembly chamber (6), and the upper radial protrusion of mission case (1) has the support block (4) corresponding with oil pump (3), the middle part of support block (4) is axially arranged with mounting hole;
One end of described support block (4) and the pump housing (11) of oil pump (3) are connected, and the other end cooperation of the pump housing (11) is provided with protecgulum (10); One end of described oil pump input shaft (19) is positioned at the pump housing (11), and the other end of oil pump input shaft (19) is positioned at the mounting hole of support block (4) and oil pump input shaft (19) end being positioned at mounting hole is provided with driving hole;
The other end of described support block (4) coordinates and is provided with motor (5), motor output shaft (24) coordinate put in support block (4) mounting hole in and by the driving hole connection for transmission of key with oil pump input shaft (19), drive oil pump input shaft (19) rotation.
3. a kind of double-clutch speed changer improving oil pump arrangement structure according to claim 2, it is characterized in that: described oil pump input shaft (19) is fixed in the mounting hole of support block (4) by clutch shaft bearing (20), and described motor output shaft (24) is fixed in the mounting hole of support block (4) by the second bearing (23).
4. a kind of double-clutch speed changer improving oil pump arrangement structure according to Claims 2 or 3, it is characterized in that: described in be positioned at mounting hole oil pump input shaft (19) be provided with large baffle ring (18), the side of large baffle ring (18) contacts with clutch shaft bearing (20), opposite side contacts with the pump housing (11), and large baffle ring (18) realizes the axially locating of clutch shaft bearing (20);
The upper cooperation of the described motor output shaft (24) being positioned at mounting hole is provided with oil sealing (21), and motor output shaft (24) between oil sealing (21) and the second bearing (23) is provided with little baffle ring (22), axially locating that little baffle ring (22) realizes the second bearing (23).
5. a kind of double-clutch speed changer improving oil pump arrangement structure according to claim 1, is characterized in that: described oil pump (3) adopts multiple tooth poor cycloidal gear oil pump; Be provided with the driving gear (8) in internal messing, driven gear (9) in the pump housing (11) of oil pump (3), and between driving gear (8) and driven gear (9), cooperation is provided with swing link (7);
The described pump housing (11) is respectively equipped with filler opening (12), return opening (13) in engaging-in oil suction place of driving gear (8) and driven gear (9), and filler opening (12) and return opening (13) are connected with fuel tank respectively by the inflow pipeline (15) of protecgulum (10), oil returning tube (16);
The described pump housing (11) is provided with oil outlet (14) at driving gear (8) and oil extraction place of nibbling out of driven gear (9), and oil outlet (14) is communicated with the oil duct on mission case (1) sidewall by the flowline (17) of protecgulum (10), fluid is made to enter double clutch chamber (2) respectively by first point of oil duct (25) of oil duct, second point of oil duct (26) and gear train assembly chamber (6) carry out lubricating and providing power;
Described motor (5) adopts direct current type permagnetic synchronous motor, and motor (5) provides power by independent storage battery.
6. a kind of double-clutch speed changer improving oil pump arrangement structure according to claim 1 or 5, is characterized in that: the number of teeth of described driving gear (8) is 8-10, and the number of teeth of driven gear (9) is 10-13.
7. a kind of double-clutch speed changer improving oil pump arrangement structure according to claim 6, is characterized in that: many 2 to 3 of the number of teeth of the gear ratio driving gear (8) of described driven gear (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510138465.8A CN104728416A (en) | 2015-03-27 | 2015-03-27 | Dual clutch transmission with improved oil pump arrangement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510138465.8A CN104728416A (en) | 2015-03-27 | 2015-03-27 | Dual clutch transmission with improved oil pump arrangement structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104728416A true CN104728416A (en) | 2015-06-24 |
Family
ID=53452622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510138465.8A Pending CN104728416A (en) | 2015-03-27 | 2015-03-27 | Dual clutch transmission with improved oil pump arrangement structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104728416A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108779773A (en) * | 2016-03-22 | 2018-11-09 | 加特可株式会社 | The exhaust structure and exhaust structure assemble method of automatic transmission fluid pump |
| CN109114199A (en) * | 2018-10-23 | 2019-01-01 | 珠海格力智能装备有限公司 | Speed adjusting device and testing machine with same |
| CN112815077A (en) * | 2021-03-31 | 2021-05-18 | 重庆长安汽车股份有限公司 | Oil return path structure of hybrid transmission box |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5993169A (en) * | 1996-07-26 | 1999-11-30 | Toyota Jidosha Kabushiki Kaisha | Oil pressure generator having at least two coaxial rotating power sources and power output apparatus |
| CN1737411A (en) * | 2004-03-22 | 2006-02-22 | 通用汽车公司 | Motor drive donkey pump for torsional damper of an electrically variable transmission device |
| DE102006012838A1 (en) * | 2005-05-11 | 2006-11-23 | Zf Friedrichshafen Ag | Automatic transmission for motor vehicle has additional oil pump installed or integrated in oil sump and provided with suction line in sump which is connectable to oil filter |
| CN201636003U (en) * | 2010-03-04 | 2010-11-17 | 浙江吉利汽车研究院有限公司 | Front oil pump structure for double-clutch type automatic speed changer |
| CN102032337A (en) * | 2009-10-06 | 2011-04-27 | 加特可株式会社 | Oil pump control apparatus for vehicle |
| CN102734447A (en) * | 2011-03-30 | 2012-10-17 | 日立汽车系统株式会社 | Electric oil pump |
| CN103975180A (en) * | 2011-11-09 | 2014-08-06 | 格特拉格传动机构和齿轮工厂赫尔曼·哈根迈尔有限公司&两合公司 | Drive train cooling arrangement and method for operating same |
| CN104455353A (en) * | 2013-09-24 | 2015-03-25 | 铃木株式会社 | Driving device for hybrid vehicle |
| CN204573047U (en) * | 2015-03-27 | 2015-08-19 | 合肥工业大学 | A kind of double-clutch speed changer improving oil pump arrangement structure |
-
2015
- 2015-03-27 CN CN201510138465.8A patent/CN104728416A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5993169A (en) * | 1996-07-26 | 1999-11-30 | Toyota Jidosha Kabushiki Kaisha | Oil pressure generator having at least two coaxial rotating power sources and power output apparatus |
| CN1737411A (en) * | 2004-03-22 | 2006-02-22 | 通用汽车公司 | Motor drive donkey pump for torsional damper of an electrically variable transmission device |
| DE102006012838A1 (en) * | 2005-05-11 | 2006-11-23 | Zf Friedrichshafen Ag | Automatic transmission for motor vehicle has additional oil pump installed or integrated in oil sump and provided with suction line in sump which is connectable to oil filter |
| CN102032337A (en) * | 2009-10-06 | 2011-04-27 | 加特可株式会社 | Oil pump control apparatus for vehicle |
| CN201636003U (en) * | 2010-03-04 | 2010-11-17 | 浙江吉利汽车研究院有限公司 | Front oil pump structure for double-clutch type automatic speed changer |
| CN102734447A (en) * | 2011-03-30 | 2012-10-17 | 日立汽车系统株式会社 | Electric oil pump |
| CN103975180A (en) * | 2011-11-09 | 2014-08-06 | 格特拉格传动机构和齿轮工厂赫尔曼·哈根迈尔有限公司&两合公司 | Drive train cooling arrangement and method for operating same |
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| CN204573047U (en) * | 2015-03-27 | 2015-08-19 | 合肥工业大学 | A kind of double-clutch speed changer improving oil pump arrangement structure |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108779773A (en) * | 2016-03-22 | 2018-11-09 | 加特可株式会社 | The exhaust structure and exhaust structure assemble method of automatic transmission fluid pump |
| CN108779773B (en) * | 2016-03-22 | 2020-04-28 | 加特可株式会社 | Exhaust structure of oil pump for automatic transmission and exhaust structure assembling method |
| CN109114199A (en) * | 2018-10-23 | 2019-01-01 | 珠海格力智能装备有限公司 | Speed adjusting device and testing machine with same |
| CN109114199B (en) * | 2018-10-23 | 2024-04-05 | 珠海格力智能装备有限公司 | Speed adjusting device and test machine with same |
| CN112815077A (en) * | 2021-03-31 | 2021-05-18 | 重庆长安汽车股份有限公司 | Oil return path structure of hybrid transmission box |
| CN112815077B (en) * | 2021-03-31 | 2023-03-28 | 重庆长安汽车股份有限公司 | Oil return path structure of hybrid transmission box |
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Application publication date: 20150624 |
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| RJ01 | Rejection of invention patent application after publication |