CN107152510B - Loader hydraulic mechanical stepless transmission device - Google Patents
Loader hydraulic mechanical stepless transmission device Download PDFInfo
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- CN107152510B CN107152510B CN201710299574.7A CN201710299574A CN107152510B CN 107152510 B CN107152510 B CN 107152510B CN 201710299574 A CN201710299574 A CN 201710299574A CN 107152510 B CN107152510 B CN 107152510B
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- confluence
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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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- 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 variators with summing differentials, with the input of the CVT connected or connectable to the input shaft
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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
- 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 variators with summing differentials, with the input of the CVT connected or connectable to the input shaft
- F16H2037/0886—Power split variators with summing differentials, with the input of the CVT connected or connectable to the input shaft with switching means, e.g. to change ranges
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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
- 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
- F16H2200/2005—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with one sets of orbital gears
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structure Of Transmissions (AREA)
Abstract
The present invention discloses a kind of loader hydraulic mechanical stepless transmission device, comprising: hydraulic speed regulation loop, planet divide confluence mechanism, hydraulic machinery fixed axis gear transmission mechanism and Zheng Dao mechanism.The transmission device realizes two or three hydro-mechanical segments using planet point confluence mechanism, is respectively used to starting, low speed operation (and high speed is walked)；Reverse gear shift includes two hydro-mechanical segments.Circulating power is all not present in each hydro-mechanical segment, and compared to hydraulic machine dynamic power shift gear box, which can get higher transmission efficiency.And switching only need to manipulate 1 clutch, it can be achieved that smoothly switching between section.
Description
Technical field
Invention is related to a kind of continuously variable transmittion, and in particular to one kind is suitable for loader hydraulic mechanical stepless transmission dress
It sets.
Background technique
Currently, engineering machinery loading machine generallys use hydraulic machine dynamic power shift gear box, due to the needs of loading operation,
Acutely, hydraulic moment variator efficiency is lower, and leading to transmission system highest transmission efficiency is about 75% for speed and engine load variation.
Hydrostatic drive can facilitate realization stepless speed regulation, so that loading machine engine is often worked in economic speed section, can be improved
The efficiency of energy utilization of vehicle；But the efficiency of hydraulic pump motor enclosed speed control loop as used in Hydrostatic drive is relatively low, therefore
Compared with power shifting hydraulic mechanical transmission box, the Improvement of Hydrostatic drive is limited.
Hydrostatic-mechanical Transmission is by the compound of mechanical output and hydraulic power, it can be achieved that efficient stepless transmission, makes to start
Machine maintains stable load, is conducive to improve fuel economy, becomes one of developing direction of transmission system of wheel loader, both at home and abroad
Engineering machinery producer actively develops the research of the drive technology.
CN104136812 A, CN104136813 A, the US2006/0276291 A1 of Caterpillar Tractor disclose one
Kind loading machine is with more gear hydromechanical transmissions, hydro-mechanical segment and a high-speed hydraulic machinery comprising two continuous change
Section, two continuous hydro-mechanical segments are respectively used to starting and low speed operation, and high-speed hydraulic machinery section is for transition of walking.Due to
Two-way using hydraulic machinery power is compound, hydraulic pressure road transmitting portions power, therefore transmission efficiency is compared with hydraulic machine power shifting
Gearbox is greatly improved.
ZF company US8328676 B2 discloses a kind of loader hydraulic mechanical driving device, using two or three liquid
Press mechanical pressing section, the power dividing form converged square (Output split) using point speed and speed is divided to converge fast (Compound split),
Transmission efficiency is higher.But Hydraulic Elements power needed for two hydro-mechanical segment transmission schemes is larger；Three hydro-mechanical segments pass
Dynamic scheme, between the IIth and the IIIth section switching still remain Hydraulic Elements speed it is discontinuous.
2014/0305113 A1 of Dana Rexroth company US discloses a kind of two-part hydromechanical transmission, pure
Hydraulic section of starting and hydro-mechanical segment operation and walking.Dana Rexroth company EP 2280192B1 discloses three sections a kind of
Formula hydromechanical transmission, pure hydraulic section of starting, two hydro-mechanical segments are respectively used to operation and walking, can get higher
Transmission efficiency.But two schemes are all made of hydraulic section of starting, and efficiency starts to walk low compared with hydro-mechanical segment.
Summary of the invention
In view of this, the present invention provides a kind of loader hydraulic mechanical stepless transmission device, started to walk using hydro-mechanical segment,
Improve the transmission efficiency of transmission system of wheel loader；And switching only need to manipulate 1 clutch, it can be achieved that smoothly switching between section.
The loader hydraulic mechanical stepless transmission device includes: hydraulic speed regulation loop, planet point confluence mechanism, hydraulic
III section of mechanical I section of fixed axis gear transmission mechanism, II section of fixed axis gear transmission mechanism of hydraulic machinery, hydraulic machinery fixed axis gear transmission
Mechanism and Zheng Dao mechanism；
The hydraulic speed regulation loop includes: the closed hydraulic loop being made of hydraulic pump and hydraulic motor；The hydraulic pump
For two-way variable displacement pump, the hydraulic motor is double-action variable displacement motor；
The Zheng Dao mechanism includes: axis B, input shaft, gear A, gear B, gear P, gear Q, clutch KV and clutch
KR；The gear P being fixed on the input shaft is connected by clutch KV with gear B of the empty set on input shaft；It is fixed in institute
The gear Q stated on axis B is connected by clutch KR with gear A of the empty set on axis B；The gear Q is engaged with gear P；
The planet is divided to confluence mechanism to include: two planet rows, gear C, gear D, gear M and gear N；Wherein the first row
Star row sun gear, the second planet row sun gear and the gear C are coaxially connected, and the hydraulic motor and the first planet row are too
Sun wheel is connected；Second planet row planet carrier is connected with the first planet toothrow circle and gear M, the first planet rows of planetary frame with it is described
Gear D is connected, and the gear D is engaged with gear A and gear B respectively；Second planet row gear ring and the gear N are connected；It is described
It gear N and is engaged with the coaxial affixed gear K of hydraulic pump；
I section of fixed axis gear transmission mechanism of the hydraulic machinery includes: gear F, clutch K1, gear S, gear I and clutch
Device KL；The gear F is engaged with the gear C in the planet point confluence mechanism；The gear F passes through clutch K1With gear S
It is connected, the gear S is engaged with gear I；The gear I is connected by clutch KL with output shaft；
II section of fixed axis gear transmission mechanism of the hydraulic machinery includes: gear J, clutch K2, gear G, gear L, gear
S, gear I and clutch KL；Its middle gear J is engaged with the gear M in the planet point confluence mechanism, while the gear J is logical
Cross clutch K2It is connected with gear G, the gear G and is engaged with the coaxial affixed gear of the gear S；
III section of fixed axis gear transmission mechanism of the hydraulic machinery includes: gear J, clutch K2, gear G, gear L, gear
E, gear H and clutch KH；It is engaged with the gear L coaxial affixed gear E and gear H, the gear H passes through clutch KH
It is connected with output shaft.
The forward gear of the continuously variable transmittion includes three hydro-mechanical segments, is respectively used to starting, low speed operation and high speed
Walking；
When for starting to walk, the clutch KV, clutch K1, clutch KL engagement；Power from the input shaft input after,
Successively enter planet point confluence mechanism by gear P, clutch KV, gear B, gear D；Hereafter power is divided into two-way: straight all the way
It connects and is output to gear C by the first planet row sun gear；The another way gear N that successively process is connected with the second planet row gear ring,
Gear K is transmitted to hydraulic pump, is then output to gear C by hydraulic motor；Two-way power passes sequentially through after gear C confluence
Gear F, clutch K1, gear S, gear I, clutch KL be transferred to output shaft；
When for low speed operation, clutch KV, clutch K2, clutch KL engagement；Power is after input shaft input, successively
Enter planet point confluence mechanism by gear P, clutch KV, gear B, gear D；This rear portion power passes through and the second planet
The connected gear N of toothrow circle is transmitted to gear K, is transmitted to hydraulic pump using gear K, then transmits reversion by hydraulic motor
Star divides confluence mechanism, and power divides in confluence mechanism after completion confluence in planet, by gear M output；Then in turn through gear
J, clutch K2, gear G, gear L, gear S, gear I, clutch KL be transferred to output shaft；
When for walking at a high speed, clutch KV, clutch K2, clutch KH engagement, power from input shaft input after, successively
Enter planet point confluence mechanism by gear P, clutch KV, gear B, gear D；This rear portion power passes through and the second planet
The connected gear N of toothrow circle is transmitted to gear K, is transmitted to hydraulic pump using gear K, then transmits reversion by hydraulic motor
Star divides confluence mechanism, and power divides in confluence mechanism after completion confluence in planet, by gear M output；Then in turn through gear
J, clutch K2, gear G, gear L, gear E, gear H, clutch KH be transferred to output shaft.
There are two hydro-mechanical segments of reversing gear for continuously variable transmittion tool:
As the clutch KR, clutch K1, clutch KL engagement when, which is in and reverses gear hydraulic machinery
I section；Power successively enters planet point confluence by gear P, gear Q, clutch KR, gear A, gear D after input shaft input
Mechanism；Hereafter power is divided into two-way: being directly entered planet point confluence mechanism all the way, is directly over the first planet row sun gear all the way
It is output to gear C；Another way is successively transmitted to hydraulic pump by the gear N, the gear K that are connected with the second planet row gear ring, then
Gear C is output to by hydraulic motor；Two-way power passes sequentially through gear F, clutch K after gear C confluence1, gear S, tooth
Wheel I, clutch KL are transferred to output shaft；
As the clutch KR, clutch K2, clutch KL engagement when, which is in and reverses gear hydraulic machinery
II section；Motive successively enters planet point by gear P, gear Q, clutch KR, gear A, gear D after input shaft input
Confluence mechanism；This rear portion power passes through the gear N being connected with the second planet row gear ring and is transmitted to gear K, hydraulic pump, then
It is passed back to planet point confluence mechanism by hydraulic motor, power divides in confluence mechanism after completion confluence in planet, defeated by gear M
Out, then in turn through gear J, clutch K2, gear G, gear L, gear S, gear I, clutch KL be transferred to output shaft.
Another kind loader hydraulic mechanical stepless transmission device provided by the invention includes: that Hydraulic Adjustable Speed as described above returns
II section of confluence mechanism, I section of fixed axis gear transmission mechanism of hydraulic machinery, hydraulic machinery fixed axis gear are divided in road, planet as described above
Transmission mechanism and Zheng Dao mechanism as described above；
Wherein I section of fixed axis gear transmission mechanism of the hydraulic machinery includes: gear F, clutch K1, gear S and gear I；
The gear F is engaged with the gear C in the planet point confluence mechanism；The gear F passes through clutch K1It is connected with gear S,
The gear S is engaged with gear I；The gear I is fixed on output shaft；
II section of fixed axis gear transmission mechanism of the hydraulic machinery includes: gear J, clutch K2, gear G, gear S and gear
I；Its middle gear J is engaged with the gear M in the planet point confluence mechanism, while the gear J passes through clutch K2With gear G
It is connected, the gear G is engaged with gear I.
The utility model has the advantages that
(1) continuously variable transmittion uses hydraulic compound with mechanical power, hydraulic pressure road transmitting portions power, most of
Power passes through mechanical road transmitting, realizes high transmission efficiency and variable speed, and operating efficiency can be improved and reduce the oil consumption of engine.
(2) divide confluence mechanism, it can be achieved that two or three hydro-mechanical segments, are wherein used for for I section of hydraulic machinery using planet
Starting, II section of hydraulic machinery is used for low speed operation, and III section of hydraulic machinery for walking at a high speed；Hydro-mechanical segment starting, can be improved
The transmission efficiency of low speed；Switching only need to manipulate 1 clutch, it can be achieved that smoothly switching between section.
(3) whole stepless speed regulation, can make engine often work in economic speed, improve fuel economy, reduce hair
The noise of motivation.
(4) the zero-speed difference of clutch switches between achievable section between I section of hydraulic machinery and II section of hydraulic machinery, is suitable for making
Industry operating condition improves the service life of clutch friction plate, simplifies the design of shift logic and steerable system.II section of hydraulic machinery and
Switch between III section of hydraulic machinery for speed difference, but be mainly used for high speed walking transition operating condition, does not influence operating efficiency.
(5) between I section of hydraulic machinery and II section of hydraulic machinery, since the presence of hydraulic speed regulation system is, it can be achieved that power changes
Gear, first engages next section of clutch, unclamps again the clutch of the preceding paragraph, guarantee the not interrupt output of power, ensure that operation
Efficiency.
(6) except confluence mechanism is divided, other parts are driven using fixed axis gear, and it is defeated that loader drive mechanism on the one hand can be achieved
Enter and on the other hand the center drop that exports is away from can reduce technique and processing cost.
Detailed description of the invention
Fig. 1 is the transmission schematic diagram of the compound continuously variable transmittion of hydraulic machinery in embodiment 1；
Fig. 2 is the transmission schematic diagram of the compound continuously variable transmittion of hydraulic machinery in embodiment 2；
Wherein: 1- shell, 2- axis A, 3- gear A, 4- axis B, 5- gear B, 6- input shaft, 7- gear C, 8- hydraulic motor,
9- the first planet row sun gear, 10- hydraulic pump, 11- the first planet rows of planetary frame, 12- gear D, 13- the first planet toothrow circle,
14- clutch K1, 15- gear E, 16- gear F, 17- output shaft, 18- clutch KH, 19- gear H, 20- gear I, 21- clutch
Device KL, 22- gear G, 23- gear J, 24- clutch K2, 25- gear L, 26- gear S, 27- gear K, 28- gear M, 29- tooth
Take turns the second planet row sun gear of N, 30-, the second planet row of 31- planet carrier, the second planet row of 32- gear ring, 33- slippage pump, 34- from
Clutch KV, 35- gear P, 36- clutch KR, 37- gear Q, 38- gear R
Specific embodiment
The present invention will now be described in detail with reference to the accompanying drawings and examples.
Embodiment 1:
The present embodiment provides a kind of loading machine compound continuously variable transmittion of three-stage hydraulic machinery, which is used
Planet arrangement mechanism realizes three hydro-mechanical segments, is respectively used to starting, low speed operation and high speed and walks；Reverse gear shift includes two liquid
Press mechanical pressing section.Circulating power is all not present in each hydro-mechanical segment, compared to hydraulic machine dynamic power shift gear box, the transmission device
It can get higher transmission efficiency.
The continuously variable transmittion includes: I section of hydraulic speed regulation loop, planet point confluence mechanism, hydraulic machinery fixed axis gear biography
Motivation structure, II section of fixed axis gear transmission mechanism of hydraulic machinery, III section of fixed axis gear transmission mechanism of hydraulic machinery and Zheng Dao mechanism.
Wherein hydraulic speed regulation loop includes: hydraulic motor 8, hydraulic pump 10 and slippage pump 33；Wherein hydraulic motor 8 is two-way
Variable displacement motor, hydraulic pump 10 are two-way variable displacement pump, and hydraulic motor 8 and hydraulic pump 10 form closed hydraulic loop, with 6 phase of input shaft
Slippage pump 33 even maintains the low pressure of closed circuit, and provides control oil pressure for hydraulic motor 8 and hydraulic pump 10.Hydraulic horse
The first planet row sun gear 9 in confluence mechanism is divided to be connected with planet up to 8, hydraulic pump 10 is coaxial by connecting shaft and gear K27
It is connected.After converting hydraulic energy for mechanical energy into hydraulic circuit by hydraulic pump 10 from power a part of engine,
This section hydraulic mechanical energy can be re-converted by hydraulic motor 8 to return in point confluence mechanism.
Zheng Dao mechanism include: axis B4, input shaft 6, gear A 3, gear B 5, gear P35, gear Q37, clutch KV34 and
Clutch KR36.Wherein, the gear B 5 of the drive end of clutch KV34 and empty set on input shaft 6 be connected, Partner with it is coaxial
The gear P35 being fixed on input shaft 6 is connected.Gear B 5 and planet divide the gear D 12 in confluence mechanism to engage.Clutch KR36
Gear A 3 on axis B4 of drive end and empty set be connected, Partner and the gear Q37 being coaxially fixed on axis B4 are connected, gear
Q37 is engaged with gear P35.Gear A 3 and planet divide the gear D 12 in confluence mechanism to engage, while on gear Q37 and axis A2
Gear R38 engagement.When clutch KV34 engagement, the power of engine after the input of input shaft 6, pass sequentially through gear P35,
Clutch KV34, gear B 5, gear D 12 divide confluence mechanism into planet, and gearbox is in forward gear at this time.As clutch KR36
When engagement, the power of engine passes sequentially through gear P35, gear Q37, clutch KR36, gear after the input of input shaft 6
A3, gear D 12, which enter, divides confluence mechanism, and gearbox is in reverse gear at this time.
Planet is divided to confluence mechanism to be made of two common planetary rows, wherein the first planet row sun gear 9, the second planet row are too
Sun wheel 30 and gear C 7 are coaxially connected by connecting shaft, and the hydraulic motor 8 is also connected with the connecting shaft.Second planet row
Planet carrier 31 is connected with the gear M28 of the first planet toothrow circle 13 and empty set in the connecting shaft, the first planet rows of planetary frame
11 and gear D 12 of the empty set in the connecting shaft be connected, the gear N29 of the second planet row gear ring 32 and empty set in the connecting shaft
It is connected, gear N29 and is engaged with the coaxial affixed gear K27 of hydraulic pump 10.Since hydraulic pump 10 passes through gear K27, gear N29
The second planet row gear ring 32 is connected, for mechanical road power after gear D 12 is from the input of the first planet rows of planetary frame 11, a part is logical
It crosses gear K27 and is transmitted to hydraulic circuit.Gear C 7 is I section of hydraulic machinery output, and gear M28 is II, III section of hydraulic machinery output.
I section of fixed axis gear transmission mechanism of hydraulic machinery includes: gear F16, clutch K114, gear S26, gear I20 and
Clutch KL21.Its middle gear F16 and planet divide the gear C 7 in confluence mechanism to engage；Clutch K114 drive end passes through company
Spindle is connected with gear S26, and Partner is connected with gear F16 of the empty set in the connecting shaft；Gear S26 and empty set are in output shaft
Gear I20 engagement on 17；Gear I20 is connected with the drive end of clutch KL21, the Partner and output shaft of clutch KL21
17 connections.As clutch K1When 14 and clutch KL21 is engaged, the power from planet point confluence mechanism passes sequentially through gear
F16, clutch K114, gear S26, gear I20, clutch KL21 are transferred to output shaft 17, finally export via output shaft 17.
II section of fixed axis gear transmission mechanism of hydraulic machinery includes: gear J23, clutch K224, gear G22, gear L25,
Gear S26, gear I20 and clutch KL21.Its middle gear J23 and planet divide the gear M28 in confluence mechanism to engage, while tooth
Take turns J23 and clutch K224 Partner is affixed, clutch K224 drive end and gear G22 are affixed, gear G22 and gear L25
Engagement, gear L25 and gear S26 are coaxially affixed, and gear S26 is engaged with gear I20 of the empty set on output shaft 17；Gear I20
It is connected with the drive end of clutch KL21, Partner and output shaft 17 connection of clutch KL21.When clutch K224 and clutch
When device KL21 is engaged, gear J23, clutch K are passed sequentially through from the power of planet point confluence mechanism224, gear G22, tooth
Wheel L25, gear S26, gear I20, clutch KL21 are transferred to output shaft 17, finally export via output shaft 17.
III section of fixed axis gear transmission mechanism of hydraulic machinery includes: gear J23, clutch K224, gear G22, gear L25,
Gear E15, gear H19 and clutch KH18.Its middle gear J23 and planet divide the gear M28 in confluence mechanism to engage, while tooth
Take turns J23 and clutch K224 Partner is affixed, clutch K224 drive end and gear G22 are affixed, gear G22 and gear L25
Engagement, gear L25 and gear E15 are coaxially affixed, and the gear H19 of gear E15 and empty set on output shaft 17 is meshed, gear
H19 is connected with the drive end of clutch KH18, and the Partner of clutch KH18 is connected with output shaft 17.As clutch K224 and from
When clutch KH18 is engaged, gear J23, clutch K are passed sequentially through from the power of planet point confluence mechanism224, gear G22,
Gear L25, gear E15, gear H19, clutch KH18 are transferred to output shaft 17, finally export via output shaft 17.
Engine power is inputted from input shaft 6, and the front-rear axle of loading machine is output to after the continuously variable transmittion.The biography
Except planet divides confluence mechanism in dynamic device, other parts are driven using fixed axis gear, and the axis in transmission device is both supported upon shell 1
On.
The forward gear of the continuously variable transmittion includes three hydro-mechanical segments, is respectively used to starting, low speed operation and high speed
Walking, reverse gear shift include two hydro-mechanical segments；Specific implementation are as follows:
First segment is I section of hydraulic machinery: under the operating condition, clutch KV34, clutch K114, clutch KL21 is engaged；
Engine power successively enters planet point by gear P35, clutch KV34, gear B 5, gear D 12 after the input of input shaft 6
Confluence mechanism, the first planet rows of planetary frame 11 being transmitted in point confluence mechanism.Hereafter power is divided into two-way: power is direct all the way
Gear C 7 is output to by the first planet row sun gear 9；Another way power is successively by being connected with the second planet row gear ring 32
Gear N29, gear K27 are transmitted to hydraulic pump 10, into hydraulic circuit, are then output to gear C 7 by hydraulic motor 8；Two-way
Power is output to gear F16 after the confluence of gear C 7；Then clutch K is passed sequentially through114, gear S26, gear I20, clutch
Device KL21 is transferred to output shaft 17, finally exports via output shaft 17.
Second segment is II section of hydraulic machinery: under the operating condition, clutch KV34, clutch K224, clutch KL21 is engaged,
For engine power after the input of input shaft 6, gear P35, clutch KV34, gear B 5, gear D 12 divide confluence machine into planet
Structure；This rear portion power passes through the gear N29 being connected with the second planet row gear ring 32 and is transmitted to gear K27, using gear
K27 is transmitted to hydraulic pump 10, into hydraulic circuit, is then passed back to planet point confluence mechanism by hydraulic motor 8, power is expert at
Star divides in confluence mechanism after completion confluence, by gear M28 output, then in turn through gear J23, clutch K224, gear
G22, gear L25, gear S26, gear I20, clutch KL21 are transferred to output shaft 17, finally export via output shaft 17.
Third section is III section of hydraulic machinery: under the operating condition, clutch KV34, clutch K224, clutch KH18 is engaged,
Engine power successively passes through gear P35, clutch KV34, gear B 5, gear D 12 and enters planet point confluence mechanism.Engine
Power successively divides confluence machine into planet by gear P35, clutch KV34, gear B 5, gear D 12 after the input of input shaft 6
Structure；This rear portion power passes through the gear N29 being connected with the second planet row gear ring 32 and is transmitted to gear K27, using gear
K27 is transmitted to hydraulic pump 10, into hydraulic circuit, is then passed back to planet point confluence mechanism by hydraulic motor 8, power is expert at
Star divides in confluence mechanism after completion confluence, by gear M28 output, then in turn through gear J23, clutch K224, gear
G22, gear L25, gear E15, gear H19, clutch KH18 are transferred to output shaft 17, finally export via output shaft 17.
It reverses gear I section of hydraulic machinery: under the operating condition, clutch KR36, clutch K114, clutch KL21 is engaged；Start
Mechanomotive force successively enters row by gear P35, gear Q37, clutch KR36, gear A 3, gear D 12 after the input of input shaft 6
Star divides confluence mechanism, the first planet rows of planetary frame 11 being transmitted in point confluence mechanism.Hereafter power is divided into two-way: power all the way
Directly gear C 7 is output to from the first planet row sun gear 9 and the second planet row sun gear 30；The second planet row of another way power
Then gear ring 32 connected gear N29, gear K27 and hydraulic pump 10 are output to tooth by hydraulic motor 8 into hydraulic circuit
Take turns C7；Two-way power is output to gear F16 after the confluence of gear C 7.Then clutch K114, gear S26, gear are passed sequentially through
I20, clutch KL21 are transferred to output shaft 17, finally export via output shaft 17.
It reverses gear II section of hydraulic machinery: under the operating condition, clutch KR36, clutch K224, clutch KL21 is engaged, and is started
Mechanomotive force successively enters row by gear P35, gear Q37, clutch KR36, gear A 3, gear D 12 after the input of input shaft 6
Star divides confluence mechanism.This rear portion power passes through the gear N29 being connected with the second planet row gear ring 32 and is transmitted to gear K27,
It is transmitted to hydraulic pump 10 using gear K27, into hydraulic circuit, is then passed back to planet point confluence machine by hydraulic motor 8
Structure, power divides in confluence mechanism after completion confluence in planet, by gear M28 output, then in turn through gear J23, clutch
Device K224, gear G22, gear L25, gear S26, gear I20, clutch KL21 are transferred to output shaft 17, finally via output
Axis 17 exports.
The transmission device to change section logic as shown in table 1.
1 three-stage hydraulic machinery of table changes a section logic
The transmission device can be realized power shifting, when being connected between section of shifting gears, only need to manipulate a clutch, can first engage
Next section of clutch, then separate the clutch of the preceding paragraph, that realizes power does not interrupt transmitting, guarantee power transmission not in
It is disconnected, operating efficiency is improved, and guarantee the comfort of shift.
There are two power taking mouths for transmission device tool, and PTO1 and PTO2 as shown in Figure 1 are separately connected axis A2 and axis B4.
The transmission device carries out the confluence of hydraulic power and mechanical output using planetary mechanism, is divided to speed remittance square and two by one
The hydro-mechanical segment of a point of fast (Compound split) power dividing form of speed remittance is connected.Wherein I section of hydraulic machinery with
In starting, II section of hydraulic machinery is used for low speed working condition, and III section of hydraulic machinery for walking at a high speed.Due to using hydraulic power
Compound with mechanical output, transmission efficiency is high compared with hydraulic machine dynamic power shift gear box；It can guarantee the height during operation and transition
Transmission efficiency and low oil consumption.Astern condition is two sections, reverses gear and I section of hydraulic machinery and reverses gear II section of hydraulic machinery.
Embodiment 2:
As shown in Fig. 2, cancelling the design of height gear compared to Fig. 1 program, that is, eliminate III section of dead axle tooth of hydraulic machinery
Wheel drive mechanism, therefore gear L25, gear E15, clutch KH18, clutch are eliminated compared to the transmission device in embodiment 1
Device KL21 and gear H19.There are two hydro-mechanical segments for the forward gear of the continuously variable transmittion, and reverse gear is also two hydraulic machineries
Section.
Transmission device in the present embodiment includes: I section of hydraulic speed regulation loop, planet point confluence mechanism, hydraulic machinery dead axle
Gear drive, II section of fixed axis gear transmission mechanism of hydraulic machinery and Zheng Dao mechanism.Wherein hydraulic speed regulation loop, planet point converge
The composition and connection relationship for flowing mechanism and Zheng Dao mechanism are same as Example 1.
Due to eliminating clutch KL21, the gear I20 affixed with output shaft 17 is provided only on output shaft 17, in liquid
Clutch KV34, clutch K need to be only engaged at I section of press mechanical pressing127；The power of I section of fixed axis gear transmission mechanism of hydraulic machinery passes
Pass route are as follows: engine power successively passes through gear P35, clutch KV34, gear B 5, gear D 12 and enters planet point confluence machine
Structure.The first planet rows of planetary frame 11 being transmitted in point confluence mechanism.Hereafter power is divided into two-way: power is directly from first all the way
Planet row sun gear 9 is output to gear C 7；The another way power gear N29 that successively process is connected with the second planet row gear ring 32,
Gear K27 is transmitted to hydraulic pump 10, into hydraulic circuit, is then output to gear C 7 by hydraulic motor 8；Two-way power is in tooth
After taking turns C7 confluence, it is output to gear F16.Then clutch K is passed sequentially through114, gear S26, gear I20 are transferred to output shaft
17, finally exported via output shaft 17.
II section of fixed axis gear transmission mechanism of hydraulic machinery includes: gear J23, clutch K224, gear G22 and gear I20.
Its middle gear G22 and gear I20 engagement.Clutch KV34 and clutch K need to be only engaged at II section of hydraulic machinery224；It is hydraulic
The power transmission line of mechanical II section of fixed axis gear transmission mechanism are as follows: engine power after the input of input shaft 6, gear P35, from
Clutch KV34, gear B 5, gear D 12 divide confluence mechanism into planet.This rear portion power passes through and the second planet row gear ring
32 connected gear N29 are transmitted to gear K27, are transmitted to hydraulic pump 10 using gear K27, into hydraulic circuit, then pass through
It crosses hydraulic motor 8 and is passed back to planet point confluence mechanism, power divides in planet in confluence mechanism after completion confluence, by gear M28
Output, then in turn through gear J23, clutch K224, gear G22, gear I20 are finally exported via output shaft 17.
It reverses gear I section of hydraulic machinery: under the operating condition, clutch KR36, clutch K114 engagements；Engine power is from input
After axis 6 inputs, successively divide confluence machine into planet by gear P35, gear Q37, clutch KR36, gear A 3, gear D 12
Structure, the first planet rows of planetary frame 11 being transmitted in point confluence mechanism.Hereafter power is divided into two-way: power is directly from first all the way
Planet row sun gear 9 and the second planet row sun gear 30 are output to gear C 7, and another way power passes through the second planet row gear ring 32
It is transmitted to gear K27 and hydraulic pump 10, into hydraulic circuit, is then output to gear C 7 by hydraulic motor 8；Two-way power exists
After gear C 7 converges, it is output to gear F16.Then clutch K is passed sequentially through114, gear S26, gear I20, finally via defeated
Shaft 17 exports.
It reverses gear II section of hydraulic machinery: under the operating condition, clutch KR36, clutch K224 engagements, engine power is from defeated
After entering the input of axis 6, successively divide confluence machine into planet by gear P35, gear Q37, clutch KR36, gear A 3, gear D 12
Structure.This rear portion power passes through the gear N29 being connected with the second planet row gear ring 32 and is transmitted to gear K27, using gear
K27 is transmitted to hydraulic pump 10, into hydraulic circuit, is then passed back to planet point confluence mechanism by hydraulic motor 8, power is expert at
Star divides in confluence mechanism after completion confluence, by gear M28 output, then in turn through gear J23, clutch K224, gear
G22, gear I20 are finally exported via output shaft 17.
The design of height gear is eliminated compared to the scheme in embodiment 1, so that reducing gear engagement number increases efficiency,
The increased quality power density of gear entirety is reduced, decreases gear accordingly, but need bigger hydraulic pump, motor
Power.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (6)
1. a kind of loader hydraulic mechanical stepless transmission device characterized by comprising hydraulic speed regulation loop, planet point confluence
Mechanism, I section of fixed axis gear transmission mechanism of hydraulic machinery, II section of fixed axis gear transmission mechanism of hydraulic machinery, III section of hydraulic machinery it is fixed
Shaft gear transmission mechanism and Zheng Dao mechanism；
The hydraulic speed regulation loop includes: the closed hydraulic loop being made of hydraulic pump (10) and hydraulic motor (8)；It is described hydraulic
Pumping (10) is two-way variable displacement pump, and the hydraulic motor (8) is double-action variable displacement motor；
The Zheng Dao mechanism include: axis B (4), input shaft (6), gear A (3), gear B (5), gear P (35), gear Q (37),
Clutch KV (34) and clutch KR (36)；Be fixed in gear P (35) on the input shaft (6) by clutch KV (34) with
Gear B (5) of the empty set on input shaft (6) is connected；The gear Q (37) being fixed on the axis B (4) passes through clutch KR (36)
It is connected with gear A (3) of the empty set on axis B (4)；The gear Q (37) is engaged with gear P (35)；
The planet is divided to confluence mechanism to include: two planet rows, gear C (7), gear D (12), gear M (28) and gear N
(29)；Wherein the first planet row sun gear (9), the second planet row sun gear (30) and the gear C (7) are coaxially connected, and
The hydraulic motor (8) is connected with the first planet row sun gear (9)；Second planet row planet carrier (31) and the first planet toothrow circle
(13) and gear M (28) is connected, and the first planet rows of planetary frame (11) and the gear D (12) are connected, the gear D (12) point
It is not engaged with gear A (3) and gear B (5)；Second planet row gear ring (32) and the gear N (29) are connected；The gear N
(29) and with the coaxial affixed gear K (27) of hydraulic pump (10) it engages；
I section of fixed axis gear transmission mechanism of the hydraulic machinery includes: gear F (16), clutch K1(14), gear S (26), gear I
(20) and clutch KL (21)；The gear F (16) is engaged with the gear C (7) in the planet point confluence mechanism；The gear
F (16) passes through clutch K1(14) it is connected with gear S (26), the gear S (26) is engaged with gear I (20)；The gear I
(20) it is connected by clutch KL (21) with output shaft (17)；
II section of fixed axis gear transmission mechanism of the hydraulic machinery includes: gear J (23), clutch K2(24), gear G (22), gear
L (25), gear S (26), gear I (20) and clutch KL (21)；Its middle gear J (23) and the planet divide in confluence mechanism
Gear M (28) engagement, while the gear J (23) passes through clutch K2(24) it is connected with gear G (22), the gear G (22)
It is engaged with the coaxial affixed gear (25) of the gear S (26)；
III section of fixed axis gear transmission mechanism of the hydraulic machinery includes: gear J (23), clutch K2(24), gear G (22), gear
L (25), gear E (15), gear H (19) and clutch KH (18)；With the coaxial affixed gear E (15) of the gear L (25) and
Gear H (19) engagement, the gear H (19) are connected by clutch KH (18) with output shaft (17).
2. loader hydraulic mechanical stepless transmission device as described in claim 1, which is characterized in that the hydraulic speed regulation loop
In further include slippage pump (33), the slippage pump (33) maintains the low pressure of the closed hydraulic loop, and is described hydraulic
It pumps (10) and hydraulic motor (8) provides control oil pressure.
3. loader hydraulic mechanical stepless transmission device as described in claim 1, which is characterized in that further include axis A (2) and solid
Connect on axis A (2) with gear Q (37) the meshed gears R (38)；Power taking is provided on the axis A (2) and axis B (4)
Mouthful.
4. loader hydraulic mechanical stepless transmission device as claimed in claim 1,2 or 3, which is characterized in that the stepless transmission
The forward gear of device includes three hydro-mechanical segments, is respectively used to starting, low speed operation and high speed and walks；
When for starting to walk, the clutch KV (34), clutch K1(14), clutch KL (21) is engaged；Power is from the input shaft
(6) after inputting, successively enter planet by gear P (35), clutch KV (34), gear B (5), gear D (12) and divide confluence machine
Structure；Hereafter power is divided into two-way: being directly over the first planet row sun gear (9) all the way and is output to gear C (7)；Another way is successively
Hydraulic pump (10) are transmitted to by the gear N (29), the gear K (27) that are connected with the second planet row gear ring (32), then pass through liquid
Pressure motor (8) is output to gear C (7)；After two-way power converges in gear C (7), gear F (16), clutch K are passed sequentially through1
(14), gear S (26), gear I (20), clutch KL (21) are transferred to output shaft (17)；
When for low speed operation, clutch KV (34), clutch K2(24), clutch KL (21) is engaged；Power is from input shaft (6)
After input, successively enters planet by gear P (35), clutch KV (34), gear B (5), gear D (12) and divide confluence mechanism；This
Rear portion power passes through the gear N (29) being connected with the second planet row gear ring (32) and is transmitted to gear K (27), using gear
K (27) is transmitted to hydraulic pump (10), is then passed back to planet point confluence mechanism by hydraulic motor (8), and power converges in planet point
It flows after completing confluence in mechanism, is exported by gear M (28)；Then in turn through gear J (23), clutch K2(24), gear G
(22), gear L (25), gear S (26), gear I (20), clutch KL (21) are transferred to output shaft 17；
When for walking at a high speed, clutch KV (34), clutch K2(24), clutch KH (18) is engaged, and power is from input shaft (6)
After input, successively enters planet by gear P (35), clutch KV (34), gear B (5), gear D (12) and divide confluence mechanism；This
Rear portion power passes through the gear N (29) being connected with the second planet row gear ring (32) and is transmitted to gear K (27), using gear
K (27) is transmitted to hydraulic pump (10), is then passed back to planet point confluence mechanism by hydraulic motor (8), and power converges in planet point
It flows after completing confluence in mechanism, is exported by gear M (28)；Then in turn through gear J (23), clutch K2(24), gear G
(22), gear L (25), gear E (15), gear H (19), clutch KH (18) are transferred to output shaft (17).
5. loader hydraulic mechanical stepless transmission device as claimed in claim 1,2 or 3, which is characterized in that the stepless transmission
There are two hydro-mechanical segments of reversing gear for device tool:
When the clutch KR (36), clutch K1(14), when clutch KL (21) is engaged, which is in and reverses gear
I section of hydraulic machinery；After power is inputted from input shaft (6), successively pass through gear P (35), gear Q (37), clutch KR (36), tooth
Wheel A (3), gear D (12) enter planet and divide confluence mechanism；Hereafter power is divided into two-way: being directly entered planet point confluence machine all the way
Structure is directly over the first planet row sun gear (9) all the way and is output to gear C (7)；Another way is successively passed through and the second planet toothrow
Circle (32) connected gear N (29), gear K (27) are transmitted to hydraulic pump (10), are then output to gear by hydraulic motor (8)
C(7)；After two-way power converges in gear C (7), gear F (16), clutch K are passed sequentially through1(14), gear S (26), gear I
(20), clutch KL (21) is transferred to output shaft (17)；
When the clutch KR (36), clutch K2(24), when clutch KL (21) is engaged, which is in and reverses gear
II section of hydraulic machinery；After motive is inputted from input shaft (6), successively pass through gear P (35), gear Q (37), clutch KR
(36), gear A (3), gear D (12) enter planet and divide confluence mechanism；This rear portion power passes through and the second planet row gear ring
(32) connected gear N (29) is transmitted to gear K (27), hydraulic pump (10), is then passed back to planet point by hydraulic motor (8)
Confluence mechanism, power divides in confluence mechanism after completion confluence in planet, by gear M (28) output, then in turn through gear J
(23), clutch K2(24), gear G (22), gear L (25), gear S (26), gear I (20), clutch KL (21) are transferred to
Output shaft (17).
6. a kind of loader hydraulic mechanical stepless transmission device characterized by comprising hydraulic as described in claim 1
Speed control loop, planet as described in claim 1 divide confluence mechanism, hydraulic machinery I section of fixed axis gear transmission mechanism, hydraulic press
II section of fixed axis gear transmission mechanism of tool and Zheng Dao mechanism as described in claim 1；
I section of fixed axis gear transmission mechanism of the hydraulic machinery includes: gear F (16), clutch K1(14), gear S (26) and tooth
It takes turns I (20)；The gear F (16) is engaged with the gear C (7) in the planet point confluence mechanism；The gear F (16) by from
Clutch K1(14) it is connected with gear S (26), the gear S (26) is engaged with gear I (20)；The gear I (20) is fixed in defeated
On shaft (17)；
II section of fixed axis gear transmission mechanism of the hydraulic machinery includes: gear J (23), clutch K2(24), gear G (22), gear
S (26) and gear I (20)；Its middle gear J (23) is engaged with the gear M (28) in the planet point confluence mechanism, while described
Gear J (23) passes through clutch K2(24) it is connected with gear G (22), the gear G (22) is engaged with gear I (20).
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| CN201710299574.7A CN107152510B (en) | 2017-05-02 | 2017-05-02 | Loader hydraulic mechanical stepless transmission device |
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| CN201710299574.7A CN107152510B (en) | 2017-05-02 | 2017-05-02 | Loader hydraulic mechanical stepless transmission device |
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| CN111536202A (en) * | 2020-04-29 | 2020-08-14 | 柳工柳州传动件有限公司 | Transmission device for loader, control method of transmission device and loader |
| CN115949716B (en) * | 2023-03-09 | 2023-05-09 | 北京理工大学 | Hydraulic mechanical compound stepless transmission device for high-speed engineering vehicle |
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| US7410446B2 (en) * | 2005-12-19 | 2008-08-12 | Caterpillar Inc. | Oil warming strategy for transmission |
| KR101485619B1 (en) * | 2007-10-02 | 2015-01-22 | 젯트에프 프리드리히스하펜 아게 | Hydrostatic-mechanical power split transmission |
| US8523724B2 (en) * | 2010-11-24 | 2013-09-03 | Caterpillar Inc. | Method of synchronizing in split torque continuously variable dual clutch transmission |
| US8808131B2 (en) * | 2012-02-28 | 2014-08-19 | Caterpillar Inc. | Multi-range hydro-mechanical transmission |
| DE102013204747A1 (en) * | 2013-03-19 | 2014-09-25 | Zf Friedrichshafen Ag | Transmission device with secondary coupled power split |
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