WO1996041977A1 - Hydro-mechanical transmission - Google Patents
Hydro-mechanical transmission Download PDFInfo
- Publication number
- WO1996041977A1 WO1996041977A1 PCT/JP1996/001549 JP9601549W WO9641977A1 WO 1996041977 A1 WO1996041977 A1 WO 1996041977A1 JP 9601549 W JP9601549 W JP 9601549W WO 9641977 A1 WO9641977 A1 WO 9641977A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hydraulic
- power transmission
- transmission mechanism
- mechanical
- motor
- 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.)
- Ceased
Links
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
- F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
- F16H47/02—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
- F16H47/04—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric 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
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
- F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
- F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
- F16H37/0833—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths
- F16H37/084—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths at least one power path being a continuously variable transmission, i.e. CVT
- F16H2037/088—Power-split transmissions with summing differentials, with the input of the CVT connected or connectable to the input shaft
Definitions
- the present invention relates to a hydraulic mechanical transmission that can be suitably used as a transmission such as a wheeled hydraulic excavator. Background technology
- a mechanical type As the transmission, a mechanical type, a hydraulic type (so-called HST), a hydraulic mechanical type, a belt type, and the like are generally known.
- other types are also classified, for example, such that a mechanical type is classified as a selective sliding type, a constantly integrated type, a synchronous type, a planetary gear type, and the like.
- the hydraulic mechanical type is provided so that a hydraulic power transmission mechanism using a hydraulic pump and a hydraulic motor and a mechanical power transmission mechanism using gears can be switched and used to change the input rotation and output. Things.
- the following hydraulic-mechanical transmissions which use a high-torque hydraulic power transmission mechanism at low-speed output while using a high-efficiency power transmission mechanism at high-speed output, have been developed. Are known.
- the hydraulic mechanical transmission described in Japanese Patent Application Laid-Open No. 5-44815 is composed of two planetary gear trains, one mechanical transmission mechanism and the other hydraulic power transmission mechanism. By sharing the gear mechanism and using four direct-coupled clutches, it is possible to switch between three-speed hydraulic shift travel in each of the forward and reverse directions and mechanical shift travel in each of the three forward and reverse speeds.
- the hydraulic mechanical transmission described in Japanese Patent Application Laid-Open No. 6-15954 74 uses four multi-shaft clutches shared by a mechanical power transmission mechanism and a hydraulic power transmission mechanism.
- hydraulic traveling at the first reverse speed and forward starting at the time of forward movement of the vehicle and mechanical traveling at the first forward speed to the fourth forward speed It is possible to switch between forward 1st speed and forward 4th speed hydraulic traveling.
- the present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a hydraulic mechanical transmission capable of maximizing the advantages of a hydraulic mechanical transmission with a simple configuration.
- the present invention relates to a hydraulic mechanical transmission that switches and uses a hydraulic power transmission mechanism using a hydraulic pump and a hydraulic motor, and a mechanical power transmission mechanism using gears to change the input rotation and output.
- the mechanical power transmission mechanism has at least one planetary gear mechanism, and the output shaft of this mechanical power transmission mechanism can be output directly to the outside
- the hydraulic pump and the hydraulic motor of the hydraulic power transmission mechanism are of a variable displacement type, and one direct clutch is provided between the motor output shaft of the hydraulic power transmission mechanism and the output shaft of the mechanical power transmission mechanism. Provided.
- the direct coupling clutch may be arranged at a position higher than the lubricating oil level in the transmission case in which the direct coupling clutch is built.
- a hydraulic mechanical transmission device that switches between a hydraulic power transmission mechanism using a hydraulic pump and a hydraulic motor and a mechanical power transmission mechanism using a gear wheel so as to be able to change the input rotation and output.
- the mechanical power transmission mechanism includes first and second planetary gear mechanisms, and an output shaft of the mechanical power transmission mechanism is provided so as to be directly output to the outside.
- the hydraulic pump and the hydraulic motor of the hydraulic power transmission mechanism are One rotary clutch is provided between the motor output shaft of the hydraulic power transmission mechanism and the output shaft of the mechanical power transmission mechanism, and this rotary clutch is provided in a transmission case in which it is built. It may be arranged at a position higher than the lubricating oil level.
- a planetary gear mechanism is employed as the mechanical power transmission mechanism, and a large reduction ratio can be obtained in one stage or multiple stages with a small space.
- a variable displacement hydraulic pump and hydraulic motor are adopted for the hydraulic power transmission mechanism, so that the transmission can be continuously variable.
- there is only one direct coupling clutch and by connecting this, the output of the hydraulic power transmission mechanism is changed to the output of the mechanical power transmission mechanism and output to the outside.
- the direct rotation clutch is connected and the output rotation of the hydraulic power transmission mechanism is output to the outside, regardless of the rotation speed, other actuators having the same drive source are used.
- the desired horsepower can be supplied for the evening.
- the hydraulic power transmission mechanism itself can be continuously variable, multiple planetary gear units and multiple shaft clutches can be shared between the hydraulic power transmission mechanism and the mechanical power transmission mechanism as in the prior art.
- there is no need to perform multi-speed shifting between hydraulic traveling and mechanical traveling and only the mechanical power transmission mechanism can perform multi-speed shifting independently of the hydraulic power transmission mechanism. Therefore, as in the prior art, between the multi-speed transmission between the hydraulic traveling and the mechanical traveling
- the need for a plurality of direct coupling clutches required for switching is eliminated. Therefore, only one direct coupling clutch force is adopted. As a result, not only can the structure be made compact, but also the advantages of the hydraulic mechanical transmission can be maximized.
- the direct coupling clutch is provided at a position higher than the lubricating oil level, the lubricating oil is not agitated by the direct coupling clutch. This eliminates problems such as a decrease in power transmission efficiency and foaming of lubricating oil.
- the forward / reverse output (forward / backward for vehicles) can be switched efficiently by the hydraulic power transmission mechanism.
- the hydraulic mechanical transmission itself can output at a very low speed while driving the drive systems other than the hydraulic mechanical transmission at full speed.
- FIG. 1 is an explanatory view of a gas skeleton of a hydraulic mechanical transmission according to an embodiment of the present invention, and shows a cross section taken along line II of FIG.
- FIG. 2 is an explanatory view of a longitudinal section of the hydraulic mechanical transmission according to the embodiment of the present invention.
- a hydraulic mechanical transmission 2 is mounted on a wheeled hydraulic excavator (hereinafter, referred to as a hydraulic excavator) not shown. Then, the power of the engine 1 that drives the hydraulic shovel is distributed to the hydraulic mechanical transmission 2 and the work implement 3 in required amounts.
- a hydraulic excavator wheeled hydraulic excavator
- the hydraulic mechanical transmission 2 includes a hydraulic power transmission mechanism 10, a mechanical power transmission mechanism 20, and one direct coupling clutch 30.
- the mechanical power transmission mechanism 20, the direct coupling clutch 30, and a part of the hydraulic power transmission mechanism 10 are built in the transmission case 26. The details are as follows.
- the hydraulic power transmission mechanism 10 receives the command S1 controlled by the microcomputer based on the operator's command and the working state of the work implement 3 in the servo mechanism, and discharges the required optimal oil amount according to the command S1.
- a variable displacement hydraulic pump 11 (hereinafter referred to as a pump 11) that changes the displacement volume
- the servo mechanism receives a command S2 from an operator or a microcomputer, and the variable displacement hydraulic motor 12 (hereinafter referred to as a motor 12) that changes the displacement volume so as to obtain a necessary optimum torque corresponding to the command S2. )
- the pump 11 and the motor 12 are mounted on the side opposite to the mounting surface of the engine 1 in the transmission case 26 to thereby make the hydraulic mechanical transmission 2 compact.
- the mechanical power transmission mechanism 20 is provided with a main shaft 21 that receives a rotational force from the engine 1 at one end and drives the pump 11 at the other end.
- the sun gears 22a and 23a of the first and second planetary gear mechanisms 22 and 23 are fixed to the main shaft 21.
- the planet carrier 2 2 b of the first planetary gear mechanism 22 and the ring gear 23 c of the second planetary gear mechanism 23 are integrally connected.
- the gear is connected to the output shaft 24.
- Output shaft 24 is connected to a drive shaft (not shown). Then, the hydraulic shovel runs by transmitting the output rotation to the wheel via a differential or final reduction gear.
- the rotation of the output shaft 24 obtained by rotating the ring gear 22 c of the first planetary gear mechanism 22 and idling the ring gear 23 c of the second planetary gear mechanism 23 to the transmission case 26 is performed.
- the output speed is obtained by fixing the ring gear 22c of the first planetary gear mechanism 22 to the transmission case 26 and idling the ring gear 23c of the second planetary gear mechanism 23. It becomes slower than the rotation speed of.
- pressure oil is sent from a hydraulic circuit (not shown) to the clutch 23 d to fix the ring gear 23 c to the transmission case 26, and drain the pressure oil of the clutch 22 d to form the ring gear 22.
- idling c low speed rotation of the output shaft 24 is achieved.
- pressure oil is sent from a hydraulic circuit (not shown) to the clutch 22 d to fix the ring gear 22 c to the transmission case 26, and drain the pressure oil from the clutch 23 d to make the ring gear
- High speed rotation of the output shaft 24 is achieved by idling 23 c.
- the supply and discharge of pressure oil to and from these clutches 2 2 d and 23 d are performed by a command from a shift lever in the operator's seat or a microcomputer.
- the motor output shaft 14 of the motor 12 of the hydraulic power transmission mechanism 10 has one rotating clutch 3 that transmits the rotation to the output shaft 24 of the mechanical power transmission mechanism 20 in an intermittent manner. 0 is provided. Then, based on a command from a shift lever or a microcomputer from the operator's seat, the hydraulic oil of the clutches 2 2d and 23 d of the first and second planetary gear mechanisms 22 and 23 drains, and When hydraulic oil acts on the rotary clutch 30 from a hydraulic circuit that does not operate, the rotary input force from the first and second planetary gear mechanisms 22, 23 is cut off on the output shaft 24, and the motor output shaft 14 is replaced. Is input.
- the use of the hydraulic power transmission mechanism 10 and the use of the mechanical power transmission mechanism 20 are freely switched by one rotation clutch 30 to achieve the speed change. That is, the rotary clutch 30 is a direct coupling clutch (hereinafter referred to as a direct coupling clutch 30). Needless to say, the two-stage speed change is achieved even in the mechanical power transmission mechanism 20 by supplying and discharging the hydraulic oil to and from the clutches 22 d and 23 d.
- the effects of the hydraulic mechanical transmission 2 according to the present embodiment are as follows.
- a flow control valve 16 as shown by a broken line in FIG. 1 is additionally provided in the hydraulic circuit, and the discharge amount of the pump 11 is increased.
- the flow control valve 16 with the displacement of the motor 12 increased, the flow from the pump 11 will be mostly transferred to the drive system other than the hydraulic mechanical transmission 2.
- the hydraulic mechanical transmission 2 itself can output a very high torque and a very low speed while rotating and fully driving it.
- the hydraulic power transmission mechanism 10 can be used for the first forward speed and for the reverse speed, and the low-speed rotation side of the mechanical power transmission mechanism 20 can be set to the second speed, and the high-speed rotation side can be set to the third speed.
- the hydraulic mechanical transmission 2 has an extremely simple structure.
- the number of the first and second planetary gear mechanisms 22 and 23 need not be limited to two, but may be one or three or more. And even in such a case, only one direct coupling clutch 30 needs to be installed.
- the direct coupling clutch 30 is provided at a position higher than the lubricating oil level H of the transmission case 26 as shown in FIG.
- the direct coupling clutch 30 does not stir the lubricating oil at the time of rotation, and it is possible to prevent power transmission loss due to the stirring of the lubricating oil and occurrence of inconveniences such as scattering or foaming of the lubricating oil.
- the pump 11 is used for both the work machine 3 and the motor 12, but a pump for the work machine 3 may be provided separately. Even in this case, since there is only one engine 1 as the power source, the same effect as above can be obtained.
- the present invention is useful as a hydraulic mechanical transmission that can maximize the advantages of a hydraulic mechanical transmission with a simple configuration, and can be used for a wheeled hydraulic excavator and the like.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structure Of Transmissions (AREA)
- Motor Power Transmission Devices (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE69620605T DE69620605T2 (de) | 1995-06-09 | 1996-06-07 | Hydromechanisches getriebe |
| US08/973,233 US6086501A (en) | 1995-06-09 | 1996-06-07 | Hydro-mechanical transmission |
| EP96916336A EP0831251B1 (en) | 1995-06-09 | 1996-06-07 | Hydro-mechanical transmission |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16801495A JP3703108B2 (ja) | 1995-06-09 | 1995-06-09 | 油圧機械式変速装置 |
| JP7/168014 | 1995-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1996041977A1 true WO1996041977A1 (en) | 1996-12-27 |
Family
ID=15860213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1996/001549 Ceased WO1996041977A1 (en) | 1995-06-09 | 1996-06-07 | Hydro-mechanical transmission |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6086501A (ja) |
| EP (1) | EP0831251B1 (ja) |
| JP (1) | JP3703108B2 (ja) |
| KR (1) | KR100310447B1 (ja) |
| DE (1) | DE69620605T2 (ja) |
| WO (1) | WO1996041977A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017101034A1 (zh) * | 2015-12-16 | 2017-06-22 | 徐州重型机械有限公司 | 双动力驱动系统、工程机械车辆及控制方法 |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE507454C2 (sv) * | 1997-04-16 | 1998-06-08 | Ove Hammarstrand | Kraftöverförande system |
| US6530855B1 (en) * | 1998-11-24 | 2003-03-11 | Folsom Technologies, Inc. | Parallel hydromechanical underdrive transmission |
| US6450054B1 (en) | 2001-01-09 | 2002-09-17 | Tianfu Li | Transmission mechanism |
| KR100490639B1 (ko) * | 2002-11-13 | 2005-05-19 | 한국기계연구원 | 2속 변속단을 갖는 기계유압식 무단변속기 |
| JP2004217111A (ja) * | 2003-01-16 | 2004-08-05 | Komatsu Ltd | ホイール式作業車両のトランスミッション |
| JP4575714B2 (ja) * | 2004-06-04 | 2010-11-04 | ヤンマー株式会社 | 走行作業機 |
| US7357745B2 (en) | 2003-10-01 | 2008-04-15 | Yanmar Co., Ltd. | Travel working machine |
| DE102006025348A1 (de) * | 2006-05-31 | 2007-12-06 | Sauer-Danfoss Gmbh & Co Ohg | Hydrostatisch-mechanisches Getriebe |
| KR100841483B1 (ko) * | 2007-04-25 | 2008-06-25 | 박정규 | 골프스윙연습기구 |
| US8827853B2 (en) * | 2010-07-08 | 2014-09-09 | Parker-Hannifin Corporation | Hydraulic power split engine with enhanced torque assist |
| JP5764311B2 (ja) * | 2010-10-27 | 2015-08-19 | ヤンマー株式会社 | 動力伝達装置 |
| CN103982652B (zh) * | 2014-06-06 | 2016-08-17 | 合肥工业大学 | 动力分动汇流变速传动装置 |
| CN107830126B (zh) * | 2017-11-29 | 2023-12-05 | 滁州悦达实业有限公司 | 电液控制动力输出装置 |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5022167A (ja) * | 1973-06-29 | 1975-03-10 | ||
| JPS5076470A (ja) * | 1973-11-12 | 1975-06-23 | ||
| JPS5395462A (en) * | 1976-12-04 | 1978-08-21 | Thyssen Industrie | Steplessly adjustable speed change gear |
| JPS6159060A (ja) * | 1984-08-29 | 1986-03-26 | Shimadzu Corp | 流体機械式変速機 |
| JPS63167172A (ja) * | 1986-12-27 | 1988-07-11 | Mazda Motor Corp | 油圧式無段変速機 |
| JPH04203653A (ja) * | 1990-11-30 | 1992-07-24 | Shimadzu Corp | 無段変速機の制御装置 |
| JPH0544816A (ja) * | 1991-08-09 | 1993-02-23 | Komatsu Ltd | 装輪車両用変速装置 |
| JPH0544815A (ja) | 1991-08-09 | 1993-02-23 | Komatsu Ltd | 装輪車両用変速装置 |
| JPH0560202A (ja) * | 1991-08-26 | 1993-03-09 | Seirei Ind Co Ltd | 複合無段変速装置 |
| JPH06159474A (ja) | 1992-11-20 | 1994-06-07 | Kensetsusho Hokurikuchihou Kensetsukyoku | 作業用車両の動力伝達装置 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3411381A (en) * | 1966-09-08 | 1968-11-19 | Urs Corp | Split torque transmission |
| FR1545267A (fr) * | 1966-11-25 | 1968-11-08 | Mécanisme de transmission de force à rapport infiniment variable | |
| FR2086629A5 (ja) * | 1970-04-03 | 1971-12-31 | Peugeot & Renault | |
| JPS5623069B2 (ja) * | 1974-02-06 | 1981-05-28 | ||
| US4531421A (en) * | 1983-12-06 | 1985-07-30 | Deere & Company | Transfer case oil pump |
| US4750381A (en) * | 1986-10-21 | 1988-06-14 | Shimadzu Corporation | Hydromechanical transmission |
| US4757389A (en) * | 1987-06-15 | 1988-07-12 | Xerox Corporation | Calibration improvement with dither for a raster input scanner |
| US5228355A (en) * | 1991-11-15 | 1993-07-20 | Dana Corporation | Pto unit for a transmission or the like including a lubrication system operable only when the pto is in operation |
| DE19506062A1 (de) * | 1995-02-22 | 1996-09-05 | Deere & Co | Hydrostatisch-mechanisches Leistungsverzweigungsgetriebe |
| US5667452A (en) * | 1995-04-06 | 1997-09-16 | Caterpillar Inc. | Split torque transmission |
-
1995
- 1995-06-09 JP JP16801495A patent/JP3703108B2/ja not_active Expired - Fee Related
-
1996
- 1996-05-29 KR KR1019960018541A patent/KR100310447B1/ko not_active Expired - Fee Related
- 1996-06-07 EP EP96916336A patent/EP0831251B1/en not_active Expired - Lifetime
- 1996-06-07 US US08/973,233 patent/US6086501A/en not_active Expired - Lifetime
- 1996-06-07 DE DE69620605T patent/DE69620605T2/de not_active Expired - Lifetime
- 1996-06-07 WO PCT/JP1996/001549 patent/WO1996041977A1/ja not_active Ceased
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5022167A (ja) * | 1973-06-29 | 1975-03-10 | ||
| JPS5076470A (ja) * | 1973-11-12 | 1975-06-23 | ||
| JPS5395462A (en) * | 1976-12-04 | 1978-08-21 | Thyssen Industrie | Steplessly adjustable speed change gear |
| JPS6159060A (ja) * | 1984-08-29 | 1986-03-26 | Shimadzu Corp | 流体機械式変速機 |
| JPS63167172A (ja) * | 1986-12-27 | 1988-07-11 | Mazda Motor Corp | 油圧式無段変速機 |
| JPH04203653A (ja) * | 1990-11-30 | 1992-07-24 | Shimadzu Corp | 無段変速機の制御装置 |
| JPH0544816A (ja) * | 1991-08-09 | 1993-02-23 | Komatsu Ltd | 装輪車両用変速装置 |
| JPH0544815A (ja) | 1991-08-09 | 1993-02-23 | Komatsu Ltd | 装輪車両用変速装置 |
| JPH0560202A (ja) * | 1991-08-26 | 1993-03-09 | Seirei Ind Co Ltd | 複合無段変速装置 |
| JPH06159474A (ja) | 1992-11-20 | 1994-06-07 | Kensetsusho Hokurikuchihou Kensetsukyoku | 作業用車両の動力伝達装置 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP0831251A4 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017101034A1 (zh) * | 2015-12-16 | 2017-06-22 | 徐州重型机械有限公司 | 双动力驱动系统、工程机械车辆及控制方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69620605D1 (de) | 2002-05-16 |
| KR970002044A (ko) | 1997-01-24 |
| DE69620605T2 (de) | 2002-11-21 |
| EP0831251A4 (en) | 1999-01-27 |
| US6086501A (en) | 2000-07-11 |
| JPH08338506A (ja) | 1996-12-24 |
| EP0831251B1 (en) | 2002-04-10 |
| JP3703108B2 (ja) | 2005-10-05 |
| EP0831251A1 (en) | 1998-03-25 |
| KR100310447B1 (ko) | 2002-04-24 |
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