CN207598844U - Hydraulic machinery stepless speed change device - Google Patents
Hydraulic machinery stepless speed change device Download PDFInfo
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- CN207598844U CN207598844U CN201721102738.4U CN201721102738U CN207598844U CN 207598844 U CN207598844 U CN 207598844U CN 201721102738 U CN201721102738 U CN 201721102738U CN 207598844 U CN207598844 U CN 207598844U
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Abstract
The utility model discloses a kind of hydraulic machinery stepless speed change devices, belong to wheel type harvester tool stepless speed change device technical field, including general power input shaft, diversion mechanism, confluence mechanism, hydraulic speed regulating mechanism and mechanical variable speed device；The diversion mechanism includes the first shunting gear and the second shunting gear, and the first shunting gear is engaged with the described second shunting gear, and the first shunting gear is fixedly connected on the general power input shaft；The hydraulic speed regulating mechanism includes pump and motor, and the input shaft of the pump inputs axis connection with the general power；The confluence mechanism is planet row, the planet row includes sun gear, ring gear and planet carrier, the output axis connection of the sun gear and the motor, the ring gear connect or are set as one, the input axis connection of the planet carrier and the mechanical variable speed device with the described second shunting gear.The utility model is in simple structure and lower cost improves transmission efficiency.
Description
Technical field
The utility model belong to wheel type harvester tool stepless speed change device technical field more particularly to a kind of hydraulic machinery without
Grade speed change gear.
Background technology
In vehicle stepless speed variator system, since contiuously variable transmission can export the rotating speed of consecutive variations, so as to make to start
Machine obtains best matching with transmission system, which not only improves the dynamic property and economy of vehicle, while can also simplify behaviour
Make, mitigate the labor intensity of driver, improve vehicle traveling safety and and comfort, and discharge can also be improved,
Vehicular field has been more and more widely used.There are many type of contiuously variable transmission, according to its mode of operation and driving form
Difference can be divided into mechanical, three kinds of electrodynamic type, fluid-type contiuously variable transmissions, and wherein answered with fluid-type contiuously variable transmission
With the most generally.
Fluid-type contiuously variable transmission can be divided into two kinds of hydraulic stepless speed-changing device and hydraulic continuously variable transmission.Hydraulic stepless speed-changing
Device is also fluid torque-converter, it is to carry out energy transmission with the kinetic energy of hydraulic oil, has the function of that clutch simultaneously can also be real
Now rotating speed and the variation of torque stepless continuous, so as to make, vehicle start is steady, it is rapid soft to accelerate and has good damping
Can, the frequent variation to external world's load can be well adapted to.Its major defect is that self structure is complicated, of high cost, efficiency is low.Liquid
Pressure transmission is to carry out energy transmission with the pressure of hydraulic oil, is to carry out work by the variation of the volume of hydraulic variable displacement pump or motor operations chamber
Make.Compared with machinery, electric transmission, under conditions of Same Efficieney is exported, compact-sized, small, light-weight, carrying energy
Power is strong, while has inertia small, is active in one's movements, stable drive, and has many advantages, such as overload protection function.Hydraulic continuously variable transmission
Variable speed is wide and is easy to control so that vehicle has stable optimum speed, relatively more suitable for the engineering truck of operating mode complexity
With.Therefore, Hyaulic infinite variable speed device oneself be widely used in each machinery field especially in engineering machinery field.However, in vehicle liquid
Two major issues are still had in pressure transmission：First, transmission efficiency is relatively low, peak efficiency horizontal by present hydraulic technique
75%-85% is can only achieve, there was only 50%-70% under certain operating modes, vehicle launch or small-power work limitation rate are then lower；
Second is that powerful hydraulic pump and motor manufacture are difficult, it is extremely difficult to so high machining accuracy.The compound stepless biography of hydraulic machinery
The shortcomings that dynamic appearance overcomes hydraulic drive, the thus stepless transmission of high power hydraulic gradually pass to hydraulic machinery variable speed
Dynamic direction is developed.
It can obtain in summary, in fluid class contiuously variable transmission, Hydromechanical continuous variable transmission is in high-power biography
There are apparent advantage and vast potential for future development in dynamic field.Hydraulic mechanical stepless gearbox is one kind by hydraulic power stream and machine
The double power flow variable transmission form of tool power flow combination passing power can realize high efficiency and big by machine driving
Power power transmission realizes variable speed by hydraulic drive, it is easily achieved higher automatization level, in control system
Under effect, its gearratio can be automatically adjusted, realizes the Proper Match of adjustable engine；Hydraulic system has higher flexibility,
The impact of load acute variation can be alleviated, reduce vibration, maintain a metastable working environment.Mechanical driving part,
Based on gear auxiliary driving, transmission efficiency.System is easily assembled maintenance.Therefore hydraulic mechanical stepless gearbox is particularly suitable for
The changeable high-power heavy type vehicle of working condition complexity, multi-load, running resistance.Hydraulic machinery Variable Speed Technology structure at present
Design and control strategy comparative maturity, but be chiefly used in engineering truck, military machinery, are rarely used in agricultural harvesting mechanical.
At present, in wheel type harvester tool field, most widely used be fluid-type contiuously variable transmission is hydraulic stepless speed change
Device, i.e. standard machinery gearbox+HST (HYDRO STIC TRANSMISSION), main operational principle is：Made with hydraulic oil
For working media, by dynamical element, mechanical energy is converted into hydraulic energy, by oil line pipe, control element, by its execution
Element, then the hydraulic energy of hydraulic oil is converted back into mechanical energy, power output is carried out by motor, power is through each gear of mechanical gear box
After exporting respectively, the walking of driving complete machine or operation.
Being mainly characterized in that for the type hydraulic continuously variable transmission can be seen that by above-mentioned analysis：
1st, pump and motor used are split type, and pump and motor need to be separated and be fixed, and pump is typically secured to close to engine end, horse
Up to being typically secured at mechanical gear box；
2nd, the power transfer between engine and mechanical gear box is pure hydraulic pressure transfer, real by pump+connecting line+motor
Existing, the transmission efficiency of power depends on the overall efficiency of pump and motor；
3rd, machine's drive ability and travel speed pump matched with institute and motor are closely related, and pump and motor displacement are with complete machine
The variation of weight is more sensitive.
At present, hydraulic continuously variable transmission is primarily present two major issues：First, transmission efficiency is relatively low, by present hydraulic pressure
Technical merit, peak efficiency can only achieve 75%-85%, there was only 50%-70%, vehicle launch or small work(under certain operating modes
Rate work limitation rate is then lower；Second is that powerful hydraulic pump and motor manufacture are difficult, it is extremely difficult to so high machining accuracy.
Utility model content
Technical problem to be solved in the utility model is：A kind of hydraulic machinery stepless speed change device is provided, with simple
Structure and lower cost improve transmission efficiency.
In order to solve the above technical problems, the technical solution of the utility model is：Hydraulic machinery stepless speed change device, including：
General power input shaft, diversion mechanism, confluence mechanism, hydraulic speed regulating mechanism and mechanical variable speed device；The diversion mechanism includes the
One shunting gear and the second shunting gear, the first shunting gear are engaged with the described second shunting gear, first shunting
Gear is fixedly connected on the general power input shaft；The hydraulic speed regulating mechanism include pump and motor, the input shaft of the pump with
The general power inputs axis connection；The confluence mechanism is planet row, and the planet row includes sun gear, ring gear and planet
Frame, the output axis connection of the sun gear and the motor, the ring gear connect or are set as with the described second shunting gear
One, the input axis connection of the planet carrier and the mechanical variable speed device.
As an improvement the diversion mechanism, the confluence mechanism and the mechanical variable speed device are set to main tank case
In vivo, the general power input shaft runs through the main tank babinet.
As a further improvement, the pump and the motor using combination type structure and are fixed on the main tank babinet.
As an improvement the pump and the motor are set using split structure between the pump and the motor
There is connecting line.
As an improvement the output axis connection side of the mechanical variable speed device subtracts the input shaft of case.
As a further improvement, the output shaft of the mechanical variable speed device and the side subtract the input shaft of case and pass through spline
Set connection.
As a further improvement, the side, which subtracts, is provided with wet brake in case.
After employing above-mentioned technical proposal, the beneficial effects of the utility model are：
1) the revealed hydraulic machinery stepless speed change device of the utility model, in addition to the stepless of hydraulic continuously variable transmission
Outside speed changing function, by the way that mechanical output stream and hydraulic power stream two parts power flow are collaborated, entire change is substantially increased
The transmission efficiency of speed variator can effectively improve the fuel economy of vehicle.
2) the revealed hydraulic machinery stepless speed change device of the utility model by controlling the displacement variation of pump, is realized whole
Output power, only mechanical output are not inputted for the purely mechanic power drive of a stepless speed change device, i.e. hydraulic speed regulating mechanism
And output, by the way that travel speed during purely mechanic power drive is set in the range of the reasonable operating speed of complete machine, can further carry
The operating efficiency of high vehicle.
3) pump of hydraulic speed regulating mechanism and motor are arranged to combination type structure, eliminate the connections such as intermediate connecting pipeline
Attachment further reduces intermediate transfer power loss, improves the transmission efficiency of complete machine.
4) side subtracts setting wet brake in case, can effectively reduce brake troubles caused by friction plate fever, abrasion etc.,
Wheel end structure is simplified on the whole, improves reliability.
Description of the drawings
Fig. 1 is the schematic diagram of mechanism of the utility model；
Fig. 2 is the functional block diagram of the utility model；
Fig. 3 is the external view of the utility model embodiment；
In figure：100- general power input shafts, 101- belt pulleys, 200- diversion mechanisms, 201- first shunt gear, 202- the
Two shunting gears, 300- hydraulic speed regulating mechanisms, 301- pumps, 302- motors, 400- confluence mechanisms, 401- sun gears, 402- rows
Carrier, 403- ring gears, 500- mechanical variable speed devices, 501- main tank babinets, the output shaft of 502- mechanical variable speed devices, 503- flowers
Key set, 600- sides subtract case, 601- wet brakes, 700- fixed frames, 800- hub units.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention is further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
As shown in Figure 1, power reaches general power input shaft 100 through belt pulley 101, diversion mechanism 200 includes the first shunting
Gear 201 and second shunts gear 202, and the first shunting gear 201 is engaged with the second shunting gear 202, the first shunting gear 201
General power input shaft 100 is fixedly connected on, the second shunting gear 202 connect or be set as one with ring gear 403.
Hydraulic speed regulating mechanism 300 includes pump 301 and motor 302, pumps 301 input shaft and is connect with general power input shaft 100,
The output shaft of motor 302 is connect with sun gear 401.
Confluence mechanism 400 is substantially a planet arrangement mechanism, and the output axis connection of sun gear 401 and motor 302 is interior
Gear ring 403 connect or is set as one with the second shunting gear 202, and planet carrier 402 and the input shaft of mechanical variable speed device 500 connect
It connects.
In the present embodiment, mechanical output flows through ring gear 403, hydraulic power flows through sun gear 401 in confluence mechanism
Collaborate in 400, exported by planet carrier 402 to mechanical variable speed device 500, change the row of pump 301 or motor 302 by control system
Amount makes hydraulic speed regulating mechanism 300 have variable speed characteristic.In entire transmission system, hydraulic power stream is speed change, machinery
Power flow is constant speed.
To sum up, total power flow is divided into mechanical output stream and hydraulic power stream through diversion mechanism, and two-way power flow is by confluence machine
Structure carries out converging output.For each fixed drive ratio of mechanical output stream, the gearratio of hydraulic power stream is continuously adjusted, just
The range of a resultant gear ratio consecutive variations can be obtained, main operational principle embodies in fig. 2.
If Fig. 1 and Fig. 3 are jointly shown, mechanical variable speed device 500 realizes three gear speed changes (according to need by two engaging sleeves
Will different gears can be set), the power after speed change reaches the output shaft 502 of mechanical variable speed device, mechanical speed change through differential mechanism
The input shaft that output shaft 502 and the side of mechanism subtract case 600 is connect by spline housing 503, while subtracting the output shaft connection wheel hub of case 600
Unit 800, while the babinet for subtracting case is installed on fixed frame 700.
As shown in Figure 1, side, which subtracts, is provided with wet brake 601 in case 600.When needing braking, pass through mechanically or hydraulically side
Formula compresses, and reaches braking purpose, the braking ability for the vehicle that can be better ensured that.Certainly, wet brake can also be installed
In the other suitable position of the present embodiment power train.
As shown in figure 3, diversion mechanism 200, confluence mechanism 400 and mechanical variable speed device 500 are set to main tank babinet 501
Interior, general power input shaft 100 runs through main tank babinet 501.Pump 301 and motor 302 using combination type structure and are fixed on main tank case
Body 501.Pump 301 and motor 302 can also use split structure, at this point, needing to set connecting line between pump and motor.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (7)
1. hydraulic machinery stepless speed change device, including：
General power input shaft, diversion mechanism, confluence mechanism, hydraulic speed regulating mechanism and mechanical variable speed device；It is characterized in that,
The diversion mechanism includes the first shunting gear and the second shunting gear, the first shunting gear and the described second shunting
Gear engages, and the first shunting gear is fixedly connected on the general power input shaft；
The hydraulic speed regulating mechanism includes pump and motor, and the input shaft of the pump inputs axis connection with the general power；
The confluence mechanism is planet row, the planet row include sun gear, ring gear and planet carrier, the sun gear with
The output axis connection of the motor, the ring gear with described second shunting gear connect or is set as one, the planet carrier and
The input axis connection of the mechanical variable speed device.
2. hydraulic machinery stepless speed change device according to claim 1, which is characterized in that the diversion mechanism, the remittance
Stream mechanism and the mechanical variable speed device are set in main tank babinet, and the general power input shaft runs through the main tank babinet.
3. hydraulic machinery stepless speed change device according to claim 2, which is characterized in that the pump and the motor use
Combination type structure is simultaneously fixed on the main tank babinet.
4. hydraulic machinery stepless speed change device according to claim 1, which is characterized in that the pump and the motor use
Split structure is provided with connecting line between the pump and the motor.
5. hydraulic machinery stepless speed change device according to claim 1, which is characterized in that the mechanical variable speed device it is defeated
Go out the input shaft that axis connection side subtracts case.
6. hydraulic machinery stepless speed change device according to claim 5, which is characterized in that the mechanical variable speed device it is defeated
The input shaft that shaft subtracts case with the side is connect by spline housing.
7. hydraulic machinery stepless speed change device according to claim 5, which is characterized in that the side subtract be provided in case it is wet
Formula brake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721102738.4U CN207598844U (en) | 2017-08-30 | 2017-08-30 | Hydraulic machinery stepless speed change device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721102738.4U CN207598844U (en) | 2017-08-30 | 2017-08-30 | Hydraulic machinery stepless speed change device |
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| Publication Number | Publication Date |
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| CN207598844U true CN207598844U (en) | 2018-07-10 |
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ID=62752357
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| CN201721102738.4U Active CN207598844U (en) | 2017-08-30 | 2017-08-30 | Hydraulic machinery stepless speed change device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111204210A (en) * | 2020-03-18 | 2020-05-29 | 洛阳拖拉机研究所有限公司 | Independent pump motor driving device of stepless speed change tractor |
| CN111207198A (en) * | 2020-01-20 | 2020-05-29 | 江苏大学 | Multi-mode mechanical-hydraulic composite transmission device integrating gear, hydraulic pressure and metal belt |
| WO2021159559A1 (en) * | 2020-02-15 | 2021-08-19 | 江苏大学 | Multi-pump driven single-motor mechanical-hydraulic compound transmission device and control method therefor |
-
2017
- 2017-08-30 CN CN201721102738.4U patent/CN207598844U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111207198A (en) * | 2020-01-20 | 2020-05-29 | 江苏大学 | Multi-mode mechanical-hydraulic composite transmission device integrating gear, hydraulic pressure and metal belt |
| CN111207198B (en) * | 2020-01-20 | 2021-06-18 | 江苏大学 | Multi-mode mechanical-hydraulic composite transmission device integrating gear, hydraulic pressure and metal belt |
| WO2021159559A1 (en) * | 2020-02-15 | 2021-08-19 | 江苏大学 | Multi-pump driven single-motor mechanical-hydraulic compound transmission device and control method therefor |
| US11155154B1 (en) | 2020-02-15 | 2021-10-26 | Jiangsu University | Multi-pump driven single-motor hydro-mechanical hybrid transmission device and control method thereof |
| CN111204210A (en) * | 2020-03-18 | 2020-05-29 | 洛阳拖拉机研究所有限公司 | Independent pump motor driving device of stepless speed change tractor |
| CN111204210B (en) * | 2020-03-18 | 2024-05-24 | 洛阳拖拉机研究所有限公司 | Independent pump motor driving device of stepless speed change tractor |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee after: Weichai leiwo Heavy Industry Co.,Ltd. Address before: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee before: LOVOL HEAVY INDUSTRY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee after: Weichai Lovol Intelligent Agricultural Technology Co.,Ltd. Address before: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee before: Weichai leiwo Heavy Industry Co.,Ltd. |