CN114017484B - Three-planetary-row three-section type hydraulic mechanical continuously variable transmission of high-power tractor - Google Patents
Three-planetary-row three-section type hydraulic mechanical continuously variable transmission of high-power tractor Download PDFInfo
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- CN114017484B CN114017484B CN202111306679.3A CN202111306679A CN114017484B CN 114017484 B CN114017484 B CN 114017484B CN 202111306679 A CN202111306679 A CN 202111306679A CN 114017484 B CN114017484 B CN 114017484B
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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Abstract
The invention discloses a three-planet-row three-section type hydraulic mechanical stepless gearbox of a high-power tractor, which comprises a variable pump-variable motor system, a clutch system, a converging mechanism, a gear pair and a shaft system, wherein the variable pump-variable motor system comprises a variable pump and a variable motor, and the variable pump is connected with the variable motor; the clutch system comprises a clutch C1, a clutch C2, a clutch C3, a clutch CV and a clutch CR, wherein the clutch C1 is connected with the clutch C2, the clutch C3 is connected with the clutch C1, and the clutch CV is connected with the clutch CR. The three-planetary-row three-section type hydraulic mechanical stepless gearbox of the high-power tractor has the same speed regulation characteristic in forward and reverse sections, is driven by a variable pump-variable motor mode in hydraulic power, and has the characteristics of wide speed regulation range, low speed, large torque and the like.
Description
Technical Field
The invention relates to the technical field of high-power tractors, in particular to a three-planet-row three-section type hydraulic mechanical stepless speed changing box of a high-power tractor.
Background
The speed ratio change of a forward section and a reverse section of the three-planet-row three-position type hydraulic mechanical stepless speed changing box of the existing high-power tractor does not have symmetry, does not have the same speed regulating range, and cannot meet various operation modes of the high-power tractor.
Disclosure of Invention
The invention aims to provide a three-planetary-row three-section type hydraulic mechanical stepless gearbox of a high-power tractor, which has the same speed regulation characteristic in forward and reverse sections, adopts a variable pump-variable motor type to drive hydraulic power, and has the characteristics of wide speed regulation range, low speed, large torque and the like so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a three-planet-row three-section type hydraulic mechanical stepless gearbox of a high-power tractor comprises a variable pump-variable motor system, a clutch system, a converging mechanism, a gear pair and a shaft system, wherein the variable pump-variable motor system comprises a variable pump and a variable motor, and the variable pump is connected with the variable motor;
the clutch system comprises a clutch C1, a clutch C2, a clutch C3, a clutch CV and a clutch CR, wherein the clutch C1 is connected with the clutch C2, the clutch C3 is connected with the clutch C1, the clutch CV is connected with the clutch CR, the confluence mechanism comprises a planet row P1, a planet row P2 and a planet row P3, and the planet row P1 and a planet row P2 are connected with a planet row P3;
the gear pair comprises a gear pair I1, a gear pair I2, a gear pair I3, a gear pair I4, a gear pair I5, a gear pair I6, a gear pair I7 and a gear pair I8, the shaft system comprises a shaft I, a shaft II, a shaft III, a shaft IV, a shaft V and a shaft VI, the gear pair I1 is connected with the shaft III, the gear pair I2 is connected with the planet row P1, the gear pair I3 and the gear pair I4 are respectively connected with a clutch C1 and a clutch C2, the gear pair I5 is connected with a clutch C3, the gear pair I6 and the gear pair I8 are respectively connected with a clutch CV and a clutch CR, the gear pair I7 is connected with the gear pair I6 and the gear pair I8, and the shaft VI is connected with the gear pair I7 and the gear pair I8.
Preferably, the variable displacement motor 12 is connected to an IV shaft, which is connected to gear pair i 2.
Preferably, the planetary row P1 is connected to gear set i5, and gear set i5 is connected to clutch C3.
Preferably, the planetary row P2 and the planetary row P3 are respectively connected with the gear pair i3 and the gear pair i 4.
Preferably, the clutch C2 is connected to the clutch CV and the clutch CR is connected to the V-shaft.
The three-planet-row three-section type hydraulic mechanical stepless gearbox of the high-power tractor provided by the invention can meet various operation speed requirement modes of the high-power tractor due to the fact that the forward section position and the reverse section position have the same speed regulation characteristic, the hydraulic power circuit adopts a variable pump-variable motor driving mode, the hydraulic power circuit has a wider stepless speed regulation range, and a large transmission ratio can be provided at the forward section position and the reverse section position at a low speed, so that large torque output is realized, and the low-speed high-load operation requirements of the high-power tractor can be met.
Drawings
FIG. 1 is a schematic diagram of the overall construction of the present invention;
FIG. 2 is a forward one-stage operational schematic of the present invention;
FIG. 3 is a schematic diagram of the forward two-stage operation of the present invention;
FIG. 4 is a schematic diagram of the forward three-stage operation of the present invention;
FIG. 5 is a schematic diagram of the reverse one-stage operation of the present invention;
FIG. 6 is a schematic diagram of the reverse two-stage operation of the present invention;
FIG. 7 is a schematic diagram of the reverse three-stage operation of the present invention;
fig. 8 is a schematic diagram of a speed control loop for the variable displacement pump-variable motor system of the present invention.
In the figure: 1. a variable pump-variable motor system; 11. a variable displacement pump; 12. a variable displacement motor; 2. a clutch system; 3. a confluence mechanism; 4. a gear pair; 5. and (4) shafting.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the three-planetary-row three-section type hydraulic mechanical stepless transmission of the high-power tractor comprises a variable pump-variable motor system 1, a clutch system 2, a confluence mechanism 3, a gear pair 4 and a shaft system 5, wherein the variable pump-variable motor system 1 comprises a variable pump 11 and a variable motor 12, the variable pump 11 is connected with the variable motor 12, the variable motor 12 is connected with an IV shaft, and the IV shaft is connected with a gear pair i 2.
In the above, the variable pump 11 is directly driven by the power of the engine, the constant-displacement motor 12 is driven by the variable pump 11, and the power of the constant-displacement motor 12 drives the confluence mechanism 3 to rotate through the gear pair i2, thereby realizing the stepless speed change.
Among the above, since the clutch C1 is the first stage clutch, the clutch C2 is the second stage clutch, the clutch C3 is the third stage clutch, the clutch CV is the forward clutch, and the clutch CR is the reverse clutch, when the first stage is operated, the planetary line P1, the planetary line P2, and the planetary line P3 are operated in combination to output power; when the second section works, the planet row P1 and the planet row P2 work jointly to output power; when the third stage works, only the planetary row P1 works and outputs power.
The gear pair 4 comprises a gear pair I1, a gear pair I2, a gear pair I3, a gear pair I4, a gear pair I5, a gear pair I6, a gear pair I7 and a gear pair I8, the shaft system 5 comprises a shaft I, a shaft II, a shaft III, a shaft IV, a shaft V and a shaft VI, the gear pair I1 is connected with the shaft III, the gear pair I2 is connected with the three-planet row P1, the gear pair I3 and the gear pair I4 are respectively connected with a clutch C1 and a clutch C2, the gear pair I5 is connected with a clutch C3, the gear pair I6 and the gear pair I8 are respectively connected with a clutch CV and a clutch CR, the gear pair I7 is connected with the gear pair I6 and the gear pair I8, and the gear pair I35i 7 and the gear pair I8.
In the above, gear pair I1 is a gear pair for driving a variable displacement pump, gear pair I2 is a gear pair for driving a hydraulic power path of a converging mechanism, gear pair I3 is a first stage gear pair, gear pair I4 is a second stage gear pair, gear pair I5 is a third stage gear pair, gear pair I6 is a first forward gear pair, gear pair I7 is a second forward gear pair, gear pair I8 is a reverse gear pair, and shaft I is a power input shaft and a PTO shaft; the shaft II is a variable pump idler shaft; the shaft III is a driving shaft of the variable pump; the IV shaft is a motor shaft; the V shaft is a clutch shaft; the VI shaft is a power output shaft.
Referring to fig. 2: when the current one-stage operation is carried out: the clutch C1 and the clutch CV are engaged, the other three clutches are disengaged, part of the power of the engine directly drives the ring gear of the planetary row P1 through the shaft I, the other part of the power drives the variable pump 11 through the shafts I1 and III, the variable motor 12 is driven to rotate through hydraulic oil, and the sun gear of the planetary row P1 is driven through the shaft IV and the gear pair I2, so that the planetary row P1, the planetary row P2 and the planetary row P3 of the confluence mechanism 3 are all operated. The power output by the confluence mechanism 3 passes through the gear pair i3, the clutch C1, the shaft V, the clutch CV, the gear pair i6 and the gear pair i7, and finally drives the power output shaft, namely the shaft VI to rotate, so that the high-power tractor is driven to move forward.
Referring to fig. 3: when the current two-stage work: the clutch C2 and the clutch CV are engaged, the other three clutches are disengaged, a part of the power of the engine directly drives the ring gear of the planetary row P1 through the shaft I, the other part of the power drives the variable pump 11 through the shafts I1 and III, the variable motor 12 is driven to rotate through the hydraulic oil, and the sun gear of the planetary row P1 is driven through the shaft IV and the gear pair I2, so that the planetary row P1 and the planetary row P2 of the confluence mechanism 3 are engaged. The power output by the confluence mechanism 3 passes through the gear pair i4, the clutch C2, the shaft V, the clutch CV, the gear pair i6 and the gear pair i7, and finally drives the power output shaft, namely the shaft VI to rotate, so that the high-power tractor is driven to move forward.
Referring to fig. 4: when the current three-section work: the clutch C3 and the clutch CV are engaged, the other three clutches are disengaged, a part of the power of the engine directly drives the ring gear of the planetary row P1 through the shaft I, the other part of the power drives the variable pump 11 through the shafts I1 and III, the variable motor 12 is driven to rotate through the hydraulic oil, and the sun gear of the planetary row P1 is driven through the shaft IV and the gear pair I2, so that the planetary row P1 of the confluence mechanism 3 is operated. The power output by the confluence mechanism 3 passes through the gear pair i5, the clutch C3, the shaft V, the clutch CV, the gear pair i6 and the gear pair i7, and finally drives the power output shaft, namely the shaft VI to rotate, so that the high-power tractor is driven to move forward.
Referring to fig. 5: when working in a backward segment: the clutch C1 and the clutch CR are engaged, the other three clutches are disengaged, part of the power of the engine directly drives the ring gear of the planetary row P1 through the shaft I, the other part of the power drives the variable pump 11 through the shafts I1 and III, the variable motor 12 is driven to rotate through hydraulic oil, and the sun gear of the planetary row P1 is driven through the shaft IV and the gear pair I2, so that the planetary row P1, the planetary row P2 and the planetary row P3 of the confluence mechanism 3 are all operated. And the power output by the confluence mechanism 3 passes through the gear pair i3, the clutch C1, the shaft V, the clutch CR and the gear pair i8, and finally drives the power output shaft, namely the shaft VI to rotate, so that the high-power tractor is driven to rotate backwards.
Referring to fig. 6: when the two-stage operation is reversed: the clutch C2 and the clutch CR are engaged, the other three clutches are disengaged, part of the power of the engine directly drives the ring gear of the planetary row P1 through the shaft I, the other part of the power drives the variable pump 11 through the shafts I1 and III, the variable motor 12 is driven to rotate through the hydraulic oil, and the sun gear of the planetary row P1 is driven through the shaft IV and the gear pair I2, so that the planetary row P1 and the planetary row P2 of the confluence mechanism 3 are engaged. And the power output by the confluence mechanism 3 passes through the gear pair i4, the clutch C2, the shaft V, the clutch CR and the gear pair i8, and finally drives the power output shaft, namely the shaft VI to rotate, so that the high-power tractor is driven to rotate backwards.
Referring to fig. 7: when the three-stage work is reversed: the clutch C3 and the clutch CR are engaged, the other three clutches are disengaged, part of the power of the engine directly drives the ring gear of the planetary row P1 through the shaft I, the other part of the power drives the variable pump 11 through the shafts I1 and III, the variable motor 12 is driven to rotate through the hydraulic oil, and the sun gear of the planetary row P1 is driven through the shaft IV and the gear pair I2, so that the planetary row P1 of the confluence mechanism 3 is operated. And the power output by the confluence mechanism 3 finally drives a power output shaft, namely a VI shaft, to rotate through a gear pair i5, a clutch C2, a V shaft, a clutch CR and a gear pair i8, thereby driving the high-power tractor to rotate backwards.
Referring to fig. 8: when the variable pump-variable motor system 1 adjusts the speed in the low speed range, the variable motor 12 is kept at the maximum displacement, the speed is adjusted by changing the displacement of the variable pump 11, the speed adjusting system is in a constant torque output state at the moment, when the displacement of the variable pump 11 reaches the maximum displacement, the displacement of the variable motor 12 is adjusted to be reduced, the rotating speed of the variable motor 12 is continuously increased, the torque is reduced, and the variable motor 12 is in a constant power output state at the moment, so that the speed adjusting loop of the variable pump-variable motor system 1 has a constant torque output characteristic and a constant power output characteristic.
The three-planet-row three-section type hydraulic mechanical stepless gearbox of the high-power tractor provided by the invention can meet various operation speed requirement modes of the high-power tractor due to the fact that the forward section position and the reverse section position have the same speed regulation characteristic, the hydraulic power circuit adopts a variable pump-variable motor driving mode, the hydraulic power circuit has a wider stepless speed regulation range, and a large transmission ratio can be provided at the forward section position and the reverse section position at a low speed, so that large torque output is realized, and the low-speed high-load operation requirements of the high-power tractor can be met.
In summary, the following steps: the three-planetary-row three-section type hydraulic mechanical stepless gearbox of the high-power tractor has the same speed regulation characteristic in forward and reverse sections, is driven by a variable pump-variable motor mode in hydraulic power, and has the characteristics of wide speed regulation range, low speed, large torque and the like, so that the technical problem in the prior art can be effectively solved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (1)
1. The utility model provides a three-planetary-row three-section hydraulic mechanical continuously variable transmission of high-power tractor, includes variable pump-variable motor system (1), clutch system (2), confluence mechanism (3), gear pair (4) and shafting (5), its characterized in that: the variable pump-variable motor system (1) comprises a variable pump (11) and a variable motor (12), wherein the variable pump (11) is connected with the variable motor (12);
the clutch system (2) comprises a clutch C1, a clutch C2, a clutch C3, a clutch CV and a clutch CR, wherein one end of the clutch C1, the clutch C2, the clutch C3, the clutch CV and the clutch CR is fixedly connected with a V shaft, the confluence mechanism (3) comprises a planet row P1, a planet row P2 and a planet row P3, and the planet row P1 and the planet row P2 are connected with a planet row P3;
the gear pair (4) comprises a gear pair I1, a gear pair I2, a gear pair I3, a gear pair I4, a gear pair I5, a gear pair I6, a gear pair I7 and a gear pair I8, the shaft system (5) comprises a shaft I, a shaft II, a shaft III, a shaft IV, a shaft V and a shaft VI, the gear pair I1 connects the shaft III with the shaft I, the gear pair I2 connects the planetary row P1 with the shaft IV, the gear pair I3 connects the planetary row P3 with the other end of the clutch C6852, the gear pair I4 connects the other end of the clutch C2 with the planetary row P2 and the planetary row P2, the gear pair I2 connects the other end of the clutch C2 with the gear pair I2 through a duplicate gear pair 547 transmission, the gear pair I2 connects the other end of the clutch CV 4 with the gear pair VI and the gear pair I2, and the gear pair VI are connected with a power output shaft 2 through a power pair I2;
the variable motor (12) is connected with the shaft IV, the variable pump (11) is connected with the shaft III, the output shaft of the engine is connected with the shaft I, and the shaft I transmits the power of the engine to the planet row and the gear pair I1; the II shaft supports the intermediate gear of the i1 gear pair.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111306679.3A CN114017484B (en) | 2021-11-05 | 2021-11-05 | Three-planetary-row three-section type hydraulic mechanical continuously variable transmission of high-power tractor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111306679.3A CN114017484B (en) | 2021-11-05 | 2021-11-05 | Three-planetary-row three-section type hydraulic mechanical continuously variable transmission of high-power tractor |
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| CN114017484A CN114017484A (en) | 2022-02-08 |
| CN114017484B true CN114017484B (en) | 2022-06-03 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114673774B (en) * | 2022-02-11 | 2023-08-22 | 江苏大学 | Composite transmission device with mechanical stepless speed changer and control method thereof |
| GB2619122A (en) * | 2022-02-11 | 2023-11-29 | Univ Jiangsu | Composite drive device with mechanical continuously variable transmission, and control method therefor |
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| CN209324954U (en) * | 2019-01-08 | 2019-08-30 | 山东农业大学 | A kind of tractor infinitely variable transmission of twin shaft confluence output |
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