CN107859723B - A kind of multi-mode hydraulic machinery stepless speed change device - Google Patents
A kind of multi-mode hydraulic machinery stepless speed change device Download PDFInfo
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- CN107859723B CN107859723B CN201711163954.4A CN201711163954A CN107859723B CN 107859723 B CN107859723 B CN 107859723B CN 201711163954 A CN201711163954 A CN 201711163954A CN 107859723 B CN107859723 B CN 107859723B
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- shell
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- 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
- 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
- F16H2047/045—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 the fluid gearing comprising a plurality of pumps or motors
Abstract
The present invention relates to Vehicle Engineering drive apparatus field, specifically a kind of multi-mode hydraulic machinery stepless speed change device.Including shell and it is arranged in parallel the mode gear switching execution system being additionally provided in shell in the intracorporal double planet wheel rows of mixing machinery speed changer of shell and hydraulic transformer for controlling the independent speed change output of double planet wheel rows of mixing machinery speed changer, controlling the independent speed change output of hydraulic transformer or control double planet wheel rows of mixing machinery speed changer and hydraulic transformer mixing speed change output；The present invention is directed to be not only able to realize large-scale stepless speed regulation performance, and it can satisfy vehicle in the multi-mode demand of different operating condition downward drivings.
Description
Technical field
The present invention relates to Vehicle Engineering drive apparatus field, specifically a kind of multi-mode hydraulic machinery variable speed dress
It sets.
Background technique
Hydraulic drive, which has, arranges that convenient, power density is big, output torque and revolving speed are not influenced by input speed, are easy
The advantages that realizing stepless speed regulation and automatically controlling, but the shortcomings such as transmission efficiency is low are existed simultaneously, especially in high speed and low speed
Transmission condition, this low deficiency of transmission efficiency are more prominent.Gear mechanism transmission accurate and reliable, instantaneous transmission with passing movement
Than it is constant, compact-sized, can be achieved compared with large transmission ratio, transmitting power is big and the advantages that transmission efficiency is high, but be not easy to realize automatic
Speed change, it is even more impossible to realize variable speed.For medium-and-large-sized engineering machinery in operation, transmission system generally requires transmitting relatively high power,
And requirement can carry out efficient speed and torque conversion to power source according to working condition and payload size variation.Single use
Machine driving or hydraulic drive are all difficult to perfection and meet requirement of the medium-and-large-sized engineering machinery to transmission system.
Summary of the invention
The present invention is intended to provide a kind of multi-mode hydraulic machinery stepless speed change device, which is not only able to realize a wide range of
Stepless speed regulation performance, and can satisfy vehicle in the multi-mode demand of different operating condition downward drivings.
In order to solve the above technical problems, the technical solution adopted by the present invention are as follows: a kind of stepless change of multi-mode hydraulic machinery
Speed variator, including shell and be arranged in parallel in the intracorporal double planet wheel rows of mixing machinery speed changer of shell and hydraulic transformer, in shell
It is additionally provided with for controlling the independent speed change output of double planet wheel rows of mixing machinery speed changer, the independent speed change output of control hydraulic transformer or control
Double planet wheel rows of mixing machinery speed changer and the mode gear of hydraulic transformer mixing speed change output switch execution system；The double planet wheel rows of mixing
Mechanical transmission includes the preceding planet row and rear planet row being arranged in series by same root solar shaft；Solar shaft is opposite to each other in rear planet
One end setting of row is in hull outside and for connecting as input shaft with driving engine；The preceding planet row includes that fixation is set
Set the preceding sun gear on the solar shaft, sun gear and preceding before the front ring gear being rotatably provided in shell, engagement are connected to
Multiple preceding planetary gears between gear ring and the preceding planet carrier being arranged on multiple preceding planetary gears, are coaxially fixed on preceding planet carrier
Equipped with first gear；Planet row includes the rear sun gear being fixed on the solar shaft, is rotatably provided in shell after described
Rear gear ring, engagement in body are connected to multiple rear planetary gears and the setting planets after multiple between rear sun gear and rear gear ring
Rear planet carrier on wheel, is coaxially fixed with second gear on rear gear ring, it is coaxial on rear planet carrier on there is one end to be threaded through
The output shaft of hull outside, the part being located in shell on output shaft are fixed with third gear.
Preferably, the hydraulic transformer includes the volume adjustable hydraulic pump being connected by hydraulic circuit and variable delivery hydraulic horse
It reaches, the 4th gear is fixed on the input shaft of volume adjustable hydraulic pump, and the 4th gear engages connection with first gear, in variable
On the output shaft of hydraulic motor can clutch be equipped with engage with second gear connect the 5th gear and engage company with third gear
The 6th gear connect.
Preferably, the mode gear switching execution system includes that setting above and for controlling front ring gear turns on the inner wall of the housing
Dynamic the first brake, setting it is upper on the inner wall of the housing and for the second brake of ring gear against rotation, setting after control in the 5th tooth
First clutch and setting between wheel and variable hydraulic motor output shaft is in the 6th gear and variable hydraulic motor output shaft
Between second clutch.
Preferably, the multi-mode hydraulic machinery stepless speed change device further include one for control model gear switching hold
The hydraulic control system of row system, volume adjustable hydraulic pump and variable hydraulic motor, hydraulic control system include hydraulic oil container, repairing
Pump executes hydraulic pump, brake solenoid valve, clutch solenoid valve, the first servo for adjusting variable delivery hydraulic pump output flow
Variable device and the second servo variable displacement device for adjusting variable hydraulic motor input flow rate；Slippage pump and execution hydraulic pump
Arrival end be connected with hydraulic tank respectively, the outlet end of slippage pump passes through repairing check valve and high-pressure safety valve and variable liquid
Hydraulic circuit between press pump and variable hydraulic motor is connected；The clutch solenoid valve, brake solenoid valve, first are watched
It takes variable device and the second servo variable displacement device to connect with the outlet end for executing hydraulic pump respectively, brake solenoid valve is three
Four-way reversing valve, two of them interface in brake solenoid valve four-way interface respectively with the outlet end that executes hydraulic pump and hydraulic
Fuel tank connection, other two interface pass through one-way throttle valve respectively and execute machine with the first brake for controlling the first brake
Structure and for controlling second brake second brake executing agency connection；Clutch solenoid valve is with H-type middle-position machine
Can three position four-way directional control valve, two of them interface in clutch solenoid valve four-way interface respectively with the outlet that executes hydraulic pump
End is connected with hydraulic oil container, other two interface with one for controlling first clutch and second clutch pair of oil pockets from
The connection of clutch executing agency.
Preferably, the braking electromagnetic valve and execute hydraulic pump outlet end between connecting line on be equipped with it is hydraulic
The main overflow valve of fuel tank connection.
Beneficial effect
A kind of multi-mode hydraulic machinery stepless speed change device of the present invention at work, passes through concatenated preceding planet row
With rear planet row as mechanical transmission path, by concatenated volume adjustable hydraulic pump and variable hydraulic motor as hydraulic drive
Purely mechanic mode, liquid are realized to the logicality control of each brake and each clutch by hydraulic control system in path
Transmission conversion under press mechanical pressing hybrid mode and pure hydraulic mode, improves slewing range, largely meets big
The multi-states work requirements such as the long range transition operation of type engineering machinery.Purely mechanic mode transmission efficiency is high, can be used for long-distance
The transition of high speed travels；Hydraulic machinery hybrid mode can realize stepless speed regulation performance on the basis of machine driving, fit
Ying Xingqiang is suitble to most of duty requirements；Although pure hydraulic mode transmission efficiency is low compared with hydraulic machinery hybrid mode,
Engine can be made to operate at high efficient area always, output torque revolving speed is not influenced by input torque revolving speed, can satisfy work
The power demand of the mechanical big load low speed of journey.
A kind of multi-mode hydraulic machinery stepless speed change device of the present invention is relative at present using more hydraulic press
Tool stepless transmission, under the premise of meeting more multi-mode, structure is simpler compact, and the switching control of multi-state multi-mode is more
Flexibly, it maintains working truck speed under different phase and switches to obtain stationarity, reduce impact, improve the power of vehicle
Property.And the present apparatus does not need setting reverse gear apparatus, and under pure hydraulic mode, Hydraulic Elements can satisfy rotary speed-torque coordinate
The four-quadrant operation demand of plane advances and retreats performance almost symmetry, and simple hydraulic machinery hybrid transmission is usually
To be arranged in postposition gearbox and reverse gear, to evade the self-locking situation in area of reversing gear being likely to occur in use process.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the schematic diagram of hydraulic control system part of the invention；
Marked in the figure: the 1, first brake, 2, front ring gear, 3, preceding planetary gear, 4, volume adjustable hydraulic pump, the 5, the 4th gear, 6,
Solar shaft, 7, shell, 8, first gear, 9, preceding sun gear, 10, preceding planet carrier, 11, second brake, 12, rear planetary gear, 13,
Rear sun gear, 14, rear planet carrier, 15, second gear, 16, third gear, 17, output shaft, 18, variable hydraulic motor, 19,
Five gears, 20, second clutch, the 21, the 6th gear, 22, first clutch, 23, rear gear ring, 24, hydraulic oil container, 25, repairing
Pump, 26, execution hydraulic pump, 27, brake solenoid valve, 28, clutch solenoid valve, the 29, first servo variable displacement device, 30, second
Servo variable displacement device, 31, repairing check valve, 32, high-pressure safety valve, 33, one-way throttle valve, the 34, first brake executing agency,
35, second brake executing agency, 36, double oil pocket clutch actuating mechanisms, 37, main overflow valve.
Specific embodiment
As shown in Figures 1 and 2, a kind of multi-mode hydraulic machinery stepless speed change device of the invention, including shell 7 and simultaneously
Join double planet wheel rows of mixing machinery speed changer and the hydraulic transformer being arranged in shell 7, is additionally provided in shell 7 for controlling double-planet
Arrange the output of mechanical transmission independent speed change, the independent speed change output of control hydraulic transformer or control double planet wheel rows of mixing machinery speed changer and
The mode gear that hydraulic transformer mixes speed change output switches execution system.
Double planet wheel rows of mixing machinery speed changer includes the preceding planet row and rear planet row being arranged in series by same root solar shaft 6；
Solar shaft 6 is opposite to each other in the setting of one end of rear planet row in 7 outside of shell and for connecting as input shaft with driving engine；Before
Planet row includes the preceding sun gear 9 being fixed on solar shaft 6, the front ring gear 2 being rotatably provided in shell 7, engagement company
The multiple preceding planetary gears 3 being connected between preceding sun gear 9 and front ring gear 2 and the preceding planet carrier being arranged on multiple preceding planetary gears 3
10, first gear 8 is coaxially fixed on preceding planet carrier 10；Afterwards planet row include after being fixed on solar shaft 6 too
Sun wheel 13, the rear gear ring 23 that is rotatably provided in shell 7, engagement are connected to multiple between rear sun gear 13 and rear gear ring 23
Planetary gear 12 and the rear planet carrier 14 being arranged on multiple rear planetary gears 12 afterwards, are coaxially fixed with second on rear gear ring 23
Gear 15, it is coaxial on rear planet carrier 14 on there is one end to be threaded through shell 7 outside output shaft 17, positioned at shell on output shaft 17
Part in body 7 is fixed with third gear 16.
Hydraulic transformer includes the volume adjustable hydraulic pump 4 and variable hydraulic motor 18 being connected by hydraulic circuit, is being become
It measures and is fixed with the 4th gear 5 on the input shaft of hydraulic pump 4, and the 4th gear 5 engages connection with first gear 8, in variable liquid
On the output shaft 17 of pressure motor 18 can clutch be equipped with engage with second gear 15 connect the 5th gear 19 and with third gear
6th gear 21 of 16 engagement connections.
Mode gear switching execution system includes first for being arranged on 7 inner wall of shell and rotating for controlling front ring gear 2
Brake 1 is arranged on 7 inner wall of shell and for the second brake 11 of the rotation of gear ring 23, setting after controlling in the 5th gear
First clutch 22 and setting between 19 and 18 output shaft 17 of variable hydraulic motor is in the 6th gear 21 and variable delivery hydraulic horse
Second clutch 20 up between 18 output shafts 17.
Multi-mode hydraulic machinery stepless speed change device further includes one and switches execution system, variable for control model gear
The hydraulic control system of hydraulic pump 4 and variable hydraulic motor 18, hydraulic control system include hydraulic oil container 24, slippage pump 25,
Execute hydraulic pump 26, brake solenoid valve 27, clutch solenoid valve 28, first for adjusting 4 output flow of volume adjustable hydraulic pump
Servo variable displacement device 29 and the second servo variable displacement device 30 for adjusting 18 input flow rate of variable hydraulic motor；Slippage pump 25
Connect respectively with hydraulic oil container 24 with the arrival end for executing hydraulic pump 26, the outlet end of slippage pump 25 pass through repairing check valve 31 with
And the hydraulic circuit between high-pressure safety valve 32 and volume adjustable hydraulic pump 4 and variable hydraulic motor 18 is connected；Clutch electromagnetism
Valve 28, brake solenoid valve 27, the first servo variable displacement device 29 and the second servo variable displacement device 30 respectively with execute hydraulic pump
26 outlet end connection in braking electromagnetic valve and is executed and is equipped with and hydraulic oil on connecting line between the outlet end of hydraulic pump 26
The main overflow valve 37 that case 24 connects.Brake solenoid valve 27 is three position four-way directional control valve, in 27 four-way interface of brake solenoid valve
Two of them interface respectively with execute hydraulic pump 26 outlet end and hydraulic oil container 24 connect, other two interface passes through respectively
One-way throttle valve 33 with for controlling the first brake executing agency 34 of the first brake 1 and for controlling second brake
11 second brake executing agency 35 connects；Clutch solenoid valve 28 is the three position four-way directional control valve with H-type Median Function,
Two of them interface in 28 four-way interface of clutch solenoid valve respectively with the outlet end and hydraulic oil container 24 that execute hydraulic pump 26
Connection, other two interface are executed with a double oil pocket clutches for controlling first clutch 22 and second clutch 20
Mechanism 36 connects.
The revolving speed that the present invention is inputted from solar shaft 6 punishes two-way in preceding planet row, wherein being all the way hydraulic pressure road, passes through variable
The discharge capacity of hydraulic pump 4 and variable hydraulic motor 18 is adjusted, and revolving speed is transmitted to rear planet row, another way is mechanical road, and input turns
Speed is directly delivered to the rear sun gear 13 of rear planet row, then revolving speed is transmitted to the rear planet carrier 14 of rear planet row, i.e. device is defeated
Shaft 17 is connected with rear planet carrier 14, obtains final output revolving speed.
The various modes control logic of the hydraulic machinery stepless speed change device is as follows:
| Mode | First brake | Second brake | First clutch | Second clutch |
| Purely mechanic mode | × | ● | × | × |
| Hybrid mode | ● | × | ● | × |
| Pure hydraulic mode | ● | × | × | ● |
"●" expression plays a role；"×" expression does not play a role
If the characterisitic parameter of preceding planet row is, the characterisitic parameter of rear planet row is, then preceding planet is booked sufficient characteristic side
Journey, rear planet row meets characteristic equation。
Wherein,Respectively preceding sun gear 9, front ring gear 2, preceding planet carrier 10 revolving speed；The respectively revolving speed of rear sun gear 13, rear gear ring 23, rear planet carrier 14.
The first brake 1 is set between the front ring gear 2 and shell 7 of preceding planet row, rear planet row rear gear ring 23 with
Second brake 11 is set between shell 7, and hydraulic machinery is realized in the opening and closing by adjusting the first brake 1 and second brake 11
Switching between stepless speed change device various modes.
6th tooth of a 5th 19, low speed of gear of one high speed is installed on the armature spindle of variable hydraulic motor 18
Take turns 21 and for respectively by the armature spindle of the 5th gear 19 of high speed and the 6th gear 21 and variable hydraulic motor 18 of low speed
The first clutch 22 and second clutch 20 being fixedly connected, by the opening and closing for controlling first clutch 22 and second clutch 20
To realize that the 5th gear 19 of high speed and the transmission of the 6th gear 21 and third gear 16 of the either low speed of second gear 15 connect
It connects.
First brake 1 is not latched, and front ring gear 2 is separated with shell 7, and preceding each component of planet row is in free state, at this time
Volume adjustable hydraulic pump 4 is inputted without revolving speed, and hydraulic pressure road does not have power transmission, then engine power row after preceding planet row is transmitted to
The rear sun gear 13 of star row；Second brake 11 is latched, and rear gear ring 23 is fixed on shell 7, and rear planet row is that single input list is defeated
It does well, the left and right chamber oil pressure of cut-off clutch solenoid valve 28, double oil pocket clutch actuating mechanisms 36 is equal, and piston rod is in spring
Under the action of be restored to middle position state, first clutch 22 and second clutch 20 do not play a role at this time, power directly by
Rear sun gear 13 is transmitted to rear planet carrier 14 and exports, and speed change gear is in purely mechanic transmission condition at this time.
The locking of first brake 1, front ring gear 2 are fixed on shell 7, and preceding planet row is single-input single-output state, are started
Mechanomotive force is realized at preceding planet row divides square, transmits through hydraulic pressure road, transmits all the way through mechanical road all the way；Second brake 11 does not close
Lock, first clutch 22 engage, and rear planet row is the single output state of two inputs, fiveth gear 19 of the hydraulic pressure road power Jing Guo high speed
It is transmitted to rear planet row, is discharged in rear planet and realizes power flow concentration, planet carrier 14 exports revolving speed, this time-varying after final power warp
Speed variator is in mechanical and hydraulic hybrid transmission mode, adjusts volume adjustable hydraulic pump 4 and variable hydraulic motor 18 in hydraulic pressure road
Discharge capacity, thus change hydraulic drive branch output revolving speed size and Orientation, thus realize to 17 revolving speed of device output shaft
Control, mixed drive can be divided into speedup and two kinds of operating conditions of slowing down.
The locking of first brake 1, front ring gear 2 are fixed on shell 7, and preceding planet row is single-input single-output state, are started
Mechanomotive force is realized at preceding planet row divides square, transmits all the way through hydraulic pressure road, all the way the planet row after mechanical road is transmitted to；Second system
Dynamic device 11 is not latched, and second clutch 20 engages, and rear gear ring 23 is free state, so that mechanical road power passes at rear planet row
Interruption is passed, hydraulic pressure road power is transmitted to third gear 16 by the 6th gear 21 of low speed, finally exports revolving speed from output shaft 17.
Speed change gear is in pure hydraulic stepless transmission mode at this time, adjusts volume adjustable hydraulic pump 4 and variable delivery hydraulic horse in hydraulic drive branch
Up to 18 discharge capacity, change the size and Orientation of hydraulic pressure road output revolving speed, advances to device output shaft 17 or retreat to realize
Stepless speed regulation control.
Under purely mechanic mode, the resultant gear ratio of speed change gearRevolving speed is exported for deviceWith input speedIt
Than that is,, under this kind of mode,According to the spy of rear planet row
Property equation can obtain, therefore the resultant gear ratio of speed change gear can be obtained are as follows:。
In vehicle operation, purely mechanic transmission should use purely mechanic transmission condition when can satisfy job requirements as far as possible, with acquisition compared with
High transmission efficiency and speed.
It, can be on the basis of purely mechanic transmission by adjusting variable liquid in hydraulic pressure road under mechanical-hydraulic hybrid mode
The discharge capacity of press pump 4 and variable hydraulic motor 18 realizes the function of stepless speed regulation.If 8 revolving speed of first gear with 5 turns of the 4th gear
The ratio between speed is, the ratio between 19 revolving speed of the 5th gear of high speed and 15 revolving speed of second gear are, volume adjustable hydraulic pump 4 and variable delivery hydraulic
The ratio between the revolving speed of motor 18 is, under this operating condition,According to forward
The characteristic equation of star row can obtain: the revolving speed of preceding planet carrier 10, the revolving speed of variable hydraulic motor 18 are that the revolving speed of second gear 15 is, it can be obtained according to the characteristic equation of preceding planet row:, will
Conditions above, which is brought into, to be obtained: the resultant gear ratio of speed change gear:.This kind of mould
Formula can satisfy power demand of the engineering machinery in high speed transition operation.
Under pure hydraulic drive mode, volume adjustable hydraulic pump 4 and variable hydraulic motor 18 are tandem working relationship, engine
Whole power are transmitted by hydraulic pressure road, and the transmission ratio of whole system only passes through volume adjustable hydraulic pump 4 and variable hydraulic motor 18 at this time
Discharge capacity adjust to realize.If the ratio between 21 revolving speed of the 6th gear of low speed and 16 revolving speed of third gear are, disregarding hydraulic pressure road pressure
In the case where power and leakage loss, the resultant gear ratio of speed change gear:.This kind of mode can
With meet engineering machinery low-speed big operating condition and reverse gear traveling the needs of.
The hydraulic control system that multi-mode hydraulic machinery stepless speed change device uses, it is main to complete to volume adjustable hydraulic pump 4, become
Measure the control of hydraulic motor 18, the first brake 1, second brake 11, second clutch 20 and first clutch 22.Wherein,
The hydraulic control circuit of volume adjustable hydraulic pump 4 and variable hydraulic motor 18 executes hydraulic cylinder, two by two electric proportional valves, two swash plates
The flushing valve of 31, one, the repairing check valve of a high-pressure safety valve 32, two, a flushing overflow valve and a cooling device composition；
The hydraulic control of first brake 1 and second brake 11 is by 27, two one-way throttle valves 33 of a brake solenoid valve
It is formed with the first brake executing agency 34, second brake executing agency 35.
The control of 18 discharge capacity of volume adjustable hydraulic pump 4 and variable hydraulic motor is realized by electric proportional valve, by giving proportioning valve
Input control signal respectively, to control piston rod position and variable hydraulic motor that 4 swash plate of volume adjustable hydraulic pump executes hydraulic cylinder
18 swash plates execute the piston rod position of hydraulic cylinder, thus realize the displacement control to volume adjustable hydraulic pump 4 and variable hydraulic motor 18,
To obtain required transmission ratio.
To the control of first clutch 22 and second clutch 20 by the three-position four-way electromagnetic directional valve of H-type Median Function Lai
It realizes, by giving 28 input control signal of clutch solenoid valve, to change the liquid for flowing into double oil pocket clutch actuating mechanisms 36
Pressure oil flow direction, and then change the piston rod position of double oil pocket clutch actuating mechanisms 36, final piston rod driving clutch is real
Existing first clutch 22 and second clutch 20 respectively with the engagement of the 5th gear 19 of high speed and the 6th gear 21 of low speed and
Separation.Specific implementation are as follows: under hydraulic machinery hybrid mode, under the action of electrical signals, 28 spool of clutch solenoid valve is left
It moves, double 36 hydraulic cylinder left chamber oil inlets of oil pocket clutch actuating mechanism at this time, pressure rise, right chamber is fuel-displaced, pressure reduction, thus living
Stopper rod against the force of the spring moves right, and driving second clutch 20 is engaged with the 6th gear 21 of low speed, first clutch 22
It is separated with the 5th gear 19 of high speed, realizes the power transmitting under hybrid mode；Under pure hydraulic mode, in the work of electric signal
Under, clutch solenoid valve 28 is moved to right, at this time double 36 hydraulic cylinder right chamber oil inlets of oil pocket clutch actuating mechanism, pressure rise, left
Chamber is fuel-displaced, pressure reduction, so that piston rod against the force of the spring is moved to the left, drives the 5th tooth of first clutch 22 and high speed
19 engagement of wheel, second clutch 20 are separated with the 6th gear 21 of low speed, realize the power transmitting under pure hydraulic mode；It is purely mechanic
It under mode, is flowed into without electric current, the piston rod of double 36 hydraulic cylinders of oil pocket clutch actuating mechanism restores under spring force
Middle position, so that first clutch 22 is not engaged with the 5th gear 19 of high speed and second clutch 20 and the 6th of low speed
Gear 21 does not engage, and realizes the power transmitting under purely mechanic mode.
To the control of the first brake 1 and second brake 11 all by a shared three-position four-way electromagnetic directional valve and one
A one-way throttle valve 33 is realized, by giving brake solenoid valve 27 input control signal, flows into the first brake to change
The hydraulic oil of executing agency 34 and second brake executing agency 35 flow direction, and then change the first brake executing agency 34 and the
The piston rod position of two brake executing agencies 35, final piston rod driving brake come realize front ring gear 2 and rear gear ring 23 with
The locking and unlock of shell 7.Specific implementation are as follows: under purely mechanic mode, under electric signal effect, 27 spool of brake solenoid valve is right
It moves, high pressure oil flows into 35 oil pocket of second brake executing agency, oil pocket pressure by one-way throttle valve 33 corresponding with rear gear ring 23
Power increases, and piston rod against the force of the spring is pushed to stretch out oil cylinder, and driving second brake 11 implements locking braking to rear gear ring 23,
Meanwhile the high-pressure oil flow oil return box in 34 oil pocket of the first brake executing agency, pressure reduction, work of the piston rod in spring force
It is retracted to oil cylinder under, to implement unlocking motion to front ring gear 2 to the first brake 1.Under hydraulic machinery hybrid mode,
Under electric signal effect, 27 spool of brake solenoid valve is moved to left, and high pressure oil is flowed by one-way throttle valve 33 corresponding with front ring gear 2
Enter 34 oil pocket of the first brake executing agency, oil pocket pressure rise pushes piston rod against the force of the spring to stretch out oil cylinder, driving the
One brake 1 implements locking braking to front ring gear 2, meanwhile, the high-pressure oil flow oil return in 35 oil pocket of second brake executing agency
Case, pressure reduction, piston rod are retracted to oil cylinder under the effect of spring force, so that second brake 11 implements rear gear ring 23
Unlocking motion.Under pure hydraulic mode, the course of work and hydraulic machinery hybrid power mould of the first brake 1 and second brake 11
The course of work of formula is the same, and details are not described herein.
Claims (2)
1. a kind of multi-mode hydraulic machinery stepless speed change device, it is characterised in that: including shell (7) and be arranged in parallel in shell
(7) double planet wheel rows of mixing machinery speed changer and hydraulic transformer in are additionally provided in shell (7) and become for controlling double planet wheel rows of mixing machinery
The fast independent speed change of device exports, the independent speed change of control hydraulic transformer exports or control double planet wheel rows of mixing machinery speed changer and hydraulic speed-changing
The mode gear that device mixes speed change output switches execution system；The double planet wheel rows of mixing machinery speed changer includes passing through the same root sun
The preceding planet row and rear planet row that axis (6) is arranged in series；Solar shaft (6) is arranged in one end of rear planet row in shell (7) opposite to each other
Outside simultaneously is used to connect as input shaft with driving engine；The preceding planet row includes being fixed at the solar shaft (6)
On preceding sun gear (9), be rotatably provided in shell (7) front ring gear (2), engagement be connected to preceding sun gear (9) and nipper
The multiple preceding planetary gears (3) enclosed between (2) and the preceding planet carrier (10) being arranged on multiple preceding planetary gears (3), in preceding planet
First gear (8) are coaxially fixed on frame (10)；Planet row includes after being fixed on the solar shaft (6) after described
Sun gear (13), the rear gear ring (23) being rotatably provided in shell (7), engagement are connected to rear sun gear (13) and rear gear ring
(23) the rear planet carrier (14) of multiple rear planetary gears (12) and setting on multiple rear planetary gears (12) between, in rear gear ring
(23) second gear (15) are coaxially fixed on, it is coaxial on rear planet carrier (14) on to have one end to be threaded through shell (7) external
Output shaft (17), on output shaft (17) be located at shell (7) in part be fixed with third gear (16)；
The hydraulic transformer includes the volume adjustable hydraulic pump (4) and variable hydraulic motor (18) being connected by hydraulic circuit,
It is fixed with the 4th gear (5) on the input shaft of volume adjustable hydraulic pump (4), and the 4th gear (5) and first gear (8) company of engagement
Connect, on the output shaft (17) of variable hydraulic motor (18) can clutch be equipped with engage with second gear (15) connect the 5th gear
(19) and with third gear (16) the 6th gear (21) of connection is engaged；
The mode gear switching execution system includes being arranged on shell (7) inner wall and for controlling front ring gear (2) rotation
First brake (1), be arranged on shell (7) inner wall and for the second brake (11) of gear ring (23) rotation after control, set
First clutch (22) between the 5th gear (19) and variable hydraulic motor (18) output shaft (17) and setting are set the
Second clutch (20) between six gears (21) and variable hydraulic motor (18) output shaft (17)；
The multi-mode hydraulic machinery stepless speed change device further includes one and switches execution system, variable for control model gear
The hydraulic control system of hydraulic pump (4) and variable hydraulic motor (18), hydraulic control system include hydraulic oil container (24), repairing
Pump (25), execute hydraulic pump (26), brake solenoid valve (27), clutch solenoid valve (28), for adjusting volume adjustable hydraulic pump (4)
First servo variable displacement device (29) of output flow and the second servo for adjusting variable hydraulic motor (18) input flow rate
Variable device (30)；Slippage pump (25) and the arrival end for executing hydraulic pump (26) are connect with hydraulic oil container (24) respectively, slippage pump
(25) outlet end passes through repairing check valve (31) and high-pressure safety valve (32) and volume adjustable hydraulic pump (4) and variable hydraulic motor
(18) hydraulic circuit between is connected；The clutch solenoid valve (28), brake solenoid valve (27), the first servo variable displacement
Device (29) and the second servo variable displacement device (30) are connect with the outlet end for executing hydraulic pump (26) respectively, brake solenoid valve
(27) be three position four-way directional control valve, the two of them interface in brake solenoid valve (27) four-way interface respectively with execute hydraulic pump
(26) outlet end and hydraulic oil container (24) connection, other two interface pass through respectively one-way throttle valve (33) with for controlling the
First brake executing agency (34) of one brake (1) and second brake for controlling second brake (11) execute
Mechanism (35) connection；Clutch solenoid valve (28) is the three position four-way directional control valve with H-type Median Function, clutch solenoid valve
(28) the two of them interface in four-way interface is connect with the outlet end and hydraulic oil container (24) for executing hydraulic pump (26) respectively, separately
Outer two interfaces execute machine with a double oil pocket clutches for controlling first clutch (22) and second clutch (20)
Structure (36) connection.
2. a kind of multi-mode hydraulic machinery stepless speed change device according to claim 1, it is characterised in that: in the braking
Connecting line between solenoid valve and the outlet end for executing hydraulic pump (26) is equipped with the main overflow connecting with hydraulic oil container (24)
Valve (37).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711163954.4A CN107859723B (en) | 2017-11-21 | 2017-11-21 | A kind of multi-mode hydraulic machinery stepless speed change device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711163954.4A CN107859723B (en) | 2017-11-21 | 2017-11-21 | A kind of multi-mode hydraulic machinery stepless speed change device |
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| Publication Number | Publication Date |
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| CN107859723A CN107859723A (en) | 2018-03-30 |
| CN107859723B true CN107859723B (en) | 2019-05-21 |
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| CN201711163954.4A Expired - Fee Related CN107859723B (en) | 2017-11-21 | 2017-11-21 | A kind of multi-mode hydraulic machinery stepless speed change device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111946792B (en) * | 2020-07-20 | 2021-08-03 | 江苏大学 | Power split and power confluence combined mechanical-hydraulic compound transmission device |
| CN113099835A (en) * | 2021-05-19 | 2021-07-13 | 山东巨明机械有限公司 | Non-row self-propelled corn harvester |
| CN115013525B (en) * | 2022-05-31 | 2023-07-25 | 合肥工业大学 | Control method for switching transmission modes of double-flow transmission speed change system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2221124Y (en) * | 1995-03-10 | 1996-02-28 | 王宪平 | Tandem planetary gear differential sped reducer |
| RU2307758C1 (en) * | 2006-07-24 | 2007-10-10 | Государственное образовательное учреждение высшего профессионального образования "Южно-Уральский государственный университет" | Transmission of high-speed crawler vehicle |
| DE102012218974A1 (en) * | 2011-12-09 | 2013-06-13 | Robert Bosch Gmbh | Method of switching between transmission ranges of power distribution transmission, involves closing and opening clutch arrangements and vice versa in different speed ranges, where operating time period of arrangements is predefined |
| CN105090427B (en) * | 2015-09-09 | 2017-07-14 | 长安大学 | A kind of mechanical-hydraulic mixing stepless speed change device of use secondary component |
| CN205350221U (en) * | 2016-01-19 | 2016-06-29 | 曹金强 | Stepless speed changer |
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| CN107859723A (en) | 2018-03-30 |
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