CN217582401U - Electric hydraulic unit of engineering truck and electric engineering truck - Google Patents
Electric hydraulic unit of engineering truck and electric engineering truck Download PDFInfo
- Publication number
- CN217582401U CN217582401U CN202220978284.1U CN202220978284U CN217582401U CN 217582401 U CN217582401 U CN 217582401U CN 202220978284 U CN202220978284 U CN 202220978284U CN 217582401 U CN217582401 U CN 217582401U
- Authority
- CN
- China
- Prior art keywords
- motor
- hydraulic
- hydraulic unit
- gear reducer
- reducer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to an electronic hydraulic unit of machineshop car and electronic machineshop car, include: motor, reduction gear and hydraulic pump. The speed reducer includes: the motor is connected with the hydraulic pump in a transmission way through the parallel shaft gear reducer and the planetary gear reducer. The technical scheme can adopt a high-rotating-speed low-torque motor with low cost and small volume; meanwhile, after the speed is reduced by the parallel shaft gear reducer, the input speed of the planetary gear reducer can be reduced, the noise of the electric hydraulic unit is reduced, and the transmission stability is improved.
Description
Technical Field
The utility model relates to an engineering machine tool, concretely relates to electric hydraulic unit of machineshop car and electric machineshop car.
Background
Under the pressure of energy and environmental protection, new energy automobiles become the development direction of automobiles. With the progress of electric technology, the occupancy rate of the electric passenger car is higher and higher at present, and the electromotion of the engineering truck (including an excavator and a transfer conveyor) is also a development direction.
The engineering vehicle comprises a walking system and a hydraulic system, and a fuel engine is usually adopted to respectively provide power for a walking unit and a hydraulic unit through a transfer case. The electric engineering truck drives the walking unit to walk through the walking motor; the hydraulic unit is driven by the working motor and provides power for the hydraulic cylinder, so that the engineering truck can carry out excavation or loading operation.
In the process of electrically driving a hydraulic unit of a engineering truck, if a motor is directly used for replacing a fuel oil engine, the motor is required to have the characteristics of low rotating speed and high torque, and the high-torque motor has the defects of high cost, large volume and the like. Therefore, the electric driving of the engineering vehicle is not facilitated, and the large motor volume can directly lead to the obstruction of the product research and development process.
The technical scheme that the rotating speed of the motor is reduced and the torque is increased can also be realized through the planetary gear reducer, so that the motor with low cost, small size, high rotating speed and low torque can be adopted, and the planetary reducer with larger reduction ratio is required to be adopted. Because the planetary gear reducer is usually a straight-tooth reducer, when the input rotating speed exceeds 6000rpm, the performances of noise, stability and the like of the planetary reducer are rapidly deteriorated, and the design requirement cannot be met. Therefore, the reduction ratio of the planetary reduction gear is also limited and cannot be too large.
Therefore, how to reduce the cost of the hydraulic unit of the engineering truck, reduce the volume, reduce the noise of the hydraulic unit and improve the transmission stability is a technical problem to be solved for the electromotion of the engineering truck.
Through patent retrieval, the following patents have a certain relationship with the present application:
1. the invention relates to a hydraulic system and a method for controlling a hydraulic actuator, which are provided with the application numbers of 201910125780.5, 2019.02.20, CN110242629A, 2019.09.17, a hydraulic system and a method for controlling the hydraulic actuator and Chinese invention patent of Shantevick mine engineering machinery, inc. The hydraulic system comprises two hydraulic pumps (P1, P2) for generating hydraulic power for a Hydraulic Actuator (HA). The pumps are powered by a common electric motor (M). The operation of the actuator is controlled by controlling the speed and direction of the motor, whereby the hydraulic lines (19 a, 19 b) may be devoid of actively controlled control valves. The patent only relates to the adoption of a motor to drive the hydraulic pump, and does not relate to a specific technical scheme of how the motor is connected with the hydraulic pump.
2. The invention relates to an electrohydraulic system (1) for a construction machine (3), which is a Chinese invention patent with the application number of 201880089182.0, the application date of 2018.03.19, the publication number of CN111712604A, the publication number of 2020.09.25, the name of electrohydraulic system and a method for controlling the electrohydraulic system, and the application number of Wolvo construction equipment company, and relates to the electrohydraulic system (1) for the construction machine (3), and the electrohydraulic system comprises: an electric motor (5) for powering a working hydraulic pump (13) for operating at least one hydraulic function (7) of the work machine. The flow rate of the hydraulic fluid generated by the hydraulic pump is controlled by the operating speed of the electric motor (5). An electronically controlled control valve (25) is used to control the flow of hydraulic fluid from the pump to at least one hydraulic function. An operator input device (17, 19, 21) is used for controlling the at least one hydraulic function, wherein the operator input device can be operated in at least two operating ranges (30, 32). The electronic control unit (11) is configured to: the electric motor is maintained at a constant rotational speed and the change in the flow of hydraulic fluid to the hydraulic function is controlled by the electronically controlled control valve when the operator input device is within a first operating range, and the change in the flow of hydraulic fluid is controlled by varying the rotational speed of the electric motor and by controlling the control valve when the operator input device is within a second operating range, based on the displacement of the operator input device. The patent only relates to the hydraulic pump driven by the motor, and does not relate to a specific technical scheme of how the motor is connected with the hydraulic pump.
3. The invention relates to a Chinese invention patent with the application number of 202011585572.2, the application date of 2020.12.28, the publication number of CN112572122A, the publication number of 2021.03.30, the name of pure electric loader power assembly and the application number of Liu Zongfeng, wherein the invention patent comprises a whole vehicle controller, a power supply system, a driving motor, a motor controller, a working motor controller, a hydraulic pump, a hydraulic system, a working device, a two-gear automatic transmission and a driving axle, wherein the driving axle internally comprises a main speed reducer, a differential and half shafts, a speed sensor and a transmission controller; the power system is respectively connected with the driving motor controllers and the working motor controllers of the front shaft and the rear shaft, the motor controllers are respectively connected with the motors controlled by the motor controllers, and the driving motors of the front shaft and the rear shaft are mechanically connected with the corresponding two-gear automatic transmission and the corresponding drive axle to transmit power to the driving wheels to drive the wheels to run; the working motor is mechanically connected with the hydraulic pump, and the hydraulic pump is in fluid flow connection with the hydraulic system and provides power for the working device to work; and the vehicle control unit is electrically connected with the sensor and each controller, receives and processes the information of each part, and sends a working instruction to each part. The patent only relates to the hydraulic pump driven by the motor, and does not relate to a specific technical scheme of how the motor is connected with the hydraulic pump.
4. The invention discloses a Chinese invention patent with the application number of 202110895561.2, the application date of 2021.08.05, the publication number of CN113669314A, the publication date of 2021.11.19, the name of pure electric engineering vehicle hydraulic system and the application number of Tianjin engineering machinery research institute Limited company, wherein the invention discloses a pure electric engineering vehicle hydraulic system, which comprises the following components in parts by weight: the system comprises an oil pump motor, a hydraulic pump, a priority valve, a steering gear, a steering oil cylinder, a multi-way valve, a pilot oil source valve and a pilot valve; the oil pump motor drives a hydraulic pump communicated with a hydraulic oil tank, one path of oil way at the outlet of the hydraulic pump is communicated with a priority valve, the priority valve controls the action of a steering oil cylinder through a steering gear, and the priority valve is also communicated with the multi-way valve; the other path of oil circuit at the outlet of the hydraulic pump is connected with the pilot valve through the pilot oil source valve, the pilot valve is connected to an oil port of the multi-way valve, and the pilot valve controls the working oil cylinder to act through the multi-way valve; the multi-way valve is a main valve with a closed center function, and when the whole machine does not work or does not turn, hydraulic oil of the hydraulic pump returns to the oil tank through the three-way pressure compensator; the neutral position loss is reduced, the high-pressure overflow loss is reduced, the consumption is reduced, and the cruising ability of the power battery is improved. The patent only relates to oil circuit connection, and does not relate to a specific technical scheme of how the motor is connected with the hydraulic pump.
5. The utility model discloses an application number is "202022949937.7", application date is "2020.12.11", the utility model patent of publication number "CN214367541U", the publication date is "2021.10.08", the name is "transfer case and hydraulic pump electric drive system and electric loader", the applicant is the utility model patent of "Guangxi willow machinery shares limited", the utility model relates to a power transfer device, for solving the problem that gear oil stirring in the transfer case in the current hydraulic pump electric drive system generates heat seriously, the utility model discloses construct a transfer case and hydraulic pump electric drive system and electric loader, wherein the transfer case includes the box and is located a plurality of gears in the box, the gear includes input gear, two at least output gear, from input gear to output gear through gear meshing transmission connection, the upper portion in the box is arranged to the input gear, the lower part in the box is arranged to the output gear. The utility model discloses in, input gear is located upper portion in the box, and output gear is located the lower part in the box, and the submergence of a small part of its toothed disc is in lubricating oil, output gear relative and input gear, its rotational speed reduce through the speed reduction, and output gear reduces with the stirring oil impact degree of bottom lubricating oil, and the energy consumption that output gear stirring oil consumed just also reduces, and lubricating oil's the phenomenon that generates heat because of stirring oil also improves. This patent is different with the technical scheme of this application through transfer case with motor and hydraulic pump connection.
6. The utility model discloses a utility model patent of "tang shan ding shi car manufacturing limited company" is applied for the number "201821866377.5", and the application date is "2018.11.13", and the publication number is "CN209053154U", and the publication date is "2019.07.02", and the name is "mounting structure of electric loader hydraulic pump", this utility model patent relates to electric loader, especially a mounting structure of electric loader hydraulic pump. The hydraulic pump and the pump motor are respectively installed on the support, and the support is fixedly connected to the inner side of the rear frame. The utility model discloses simple structure, the hydraulic pump adopts solitary pump motor drive, and the energy consumption is low, and is with low costs. The patent only relates to the hydraulic pump driven by the motor, and does not relate to a specific technical scheme of how the motor is connected with the hydraulic pump.
The above patents do not relate to the technical problems of reducing the cost of the electric hydraulic unit of the engineering truck, reducing the volume, reducing the noise of the electric hydraulic unit of the engineering truck and improving the transmission stability.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to the defect that exists among the prior art, provide an electric hydraulic unit of machineshop car and electric machineshop car.
In order to solve the technical problem, the utility model discloses the technical scheme who takes does: an electro-hydraulic unit for a work vehicle, comprising: motor, reduction gear and hydraulic pump. The speed reducer includes: the motor is connected with the hydraulic pump in a transmission way through the parallel shaft gear reducer and the planetary gear reducer. The technical scheme can adopt a high-rotating-speed low-torque motor with low cost and small volume; meanwhile, after the speed is reduced by the parallel shaft gear reducer, the input speed of the planetary gear reducer can be reduced, the noise of the electric hydraulic unit is reduced, and the transmission stability is improved.
Further, the parallel shaft gear reducer includes: the driving shaft and the driven shaft are arranged in parallel, so that the driving gear and the driven gear are in meshing transmission, and the driving gear and the driven gear adopt helical teeth or herringbone teeth. Further reduce the noise of the electro-hydraulic unit and improve the transmission stability.
Furthermore, the planetary gear reducer is a multi-stage planetary gear reducer so as to increase the reduction ratio, so that a high-rotating-speed and low-torque motor is selected, and the cost is reduced.
Further, the motor, the parallel shaft gear reducer and the planetary gear reducer are sequentially connected from top to bottom.
Further, the motor and the parallel shaft gear reducer are integrally assembled and molded, and the parallel shaft gear reducer is connected with the planetary gear reducer through a bolt. The integration level of the electro-hydraulic unit is improved, the size is reduced, and the cost is reduced.
Further, the hydraulic pump is a gear pump, a roots pump, a vane pump or a plunger pump.
Further, the rotating speed of the motor is not less than 6000rpm, so that the cost is reduced.
Further, the motor adopts a permanent magnet motor. So as to improve the efficiency of the motor, reduce the volume and the weight and reduce the cost.
The application also relates to an electric machineshop car, include: traveling system and hydraulic system, hydraulic system includes: the hydraulic unit provides driving force for the hydraulic cylinder. The hydraulic unit adopts the electric hydraulic unit. The electro-hydraulic unit can adopt a high-rotating-speed low-torque motor with low cost and small volume; meanwhile, after the speed is reduced by the parallel shaft gear reducer, the input speed of the planetary gear reducer can be reduced, the noise of the electric hydraulic unit is reduced, and the transmission stability is improved.
The beneficial effects of the utility model are that: the motor in the electro-hydraulic unit is connected with the hydraulic pump after being decelerated by the parallel shaft gear reducer and the planetary gear reducer, and the technical scheme can adopt a high-rotating-speed and low-torque motor with low cost and small volume; meanwhile, after the speed is reduced by the parallel shaft gear reducer, the input speed of the planetary gear reducer can be reduced, the noise of the electric hydraulic unit is reduced, and the transmission stability is improved.
Drawings
Figure 1 is a schematic diagram of a hydraulic unit of a engineering truck,
figure 2 is a structural schematic diagram of a hydraulic unit of the engineering truck,
figure 3 is an enlarged view of a portion of figure 2,
fig. 4 is a partially enlarged view of B in fig. 2.
In the figure: 1-motor, 11-motor shaft; 2-parallel shaft reducer, 3-planetary gear reducer, 21-driving shaft, 22-driving gear, 23-driven shaft, 24-driven gear, 25-output shaft and 31-sun gear; 4-hydraulic pump.
Detailed Description
The invention will be further described by means of specific embodiments and with reference to the accompanying drawings:
the engineering vehicle comprises a walking system and a hydraulic system, and a fuel engine is usually adopted to respectively provide power for a walking unit and a hydraulic unit through a transfer case. The electric engineering truck drives the walking unit to walk through the walking motor; the hydraulic unit is driven by the working motor and provides power for the hydraulic cylinder, so that the engineering truck can carry out excavation or loading operation.
In view of the requirement of the hydraulic unit of the engineering truck for the motor to have the characteristics of low rotating speed and high torque, the high-torque motor has the defects of high cost, large volume and the like. The hydraulic unit is high in cost and is not beneficial to the electromotion of the engineering truck. In addition, the rotating speed of the motor can be reduced and the torque can be increased through the planetary gear reducer, so that the motor with low cost, small volume, high rotating speed and low torque can be adopted, but the planetary reducer with larger reduction ratio is required. Because the planetary gear reducer is usually a straight-tooth reducer, when the input rotating speed exceeds 6000rpm, the performances of noise, stability and the like of the planetary reducer are rapidly deteriorated, and the design requirement cannot be met.
This application is through setting up the reduction gear to improve the speed reduction ratio of reduction gear, thereby can be applied to machineshop car hydraulic unit with high rotational speed, low moment of torsion motor, with reduce hydraulic unit cost, be convenient for realize the machineshop car hydraulic unit is electronic. The planetary gear reducer has the characteristics of compact structure and large reduction ratio, and is suitable for hydraulic units of engineering vehicles. However, the planetary gear reducer belongs to a straight-tooth reducer, and the transmission stability is not ideal. When the input rotation speed is high, the noise is large. Therefore, a parallel shaft speed reducer is additionally arranged between the motor and the planetary gear speed reducer, and the input rotating speed of the planetary gear speed reducer is reduced through the parallel shaft speed reducer so as to reduce the noise of the planetary gear speed reducer.
As shown in fig. 1, the electro-hydraulic unit includes: a motor 1, a parallel shaft gear reducer 2, a planetary gear reducer 3 and a hydraulic pump 4. The rotating speed of the motor 1 is not less than 6000 rpm. So as to improve the efficiency of the motor, reduce the volume and the weight and reduce the cost. The motor 1 is in transmission connection with the two-stage planetary gear reducer 3 after being decelerated by the two-stage parallel shaft gear reducer 2; after being decelerated by the planetary gear reducer 3, the hydraulic pump is in transmission connection with the hydraulic pump 4. The hydraulic pump 4 pressurizes the hydraulic oil and then delivers the pressurized hydraulic oil to the hydraulic cylinders to drive the hydraulic cylinders to perform various operations. The technical scheme can adopt a high-rotating-speed low-torque motor with low cost and small volume; meanwhile, after the speed is reduced by the parallel shaft gear reducer 2, the input speed of the planetary gear reducer 3 can be reduced, so that the noise of the electric hydraulic unit is reduced, and the transmission stability is improved.
As shown in fig. 2 to 4, the motor 1, the parallel shaft gear reducer 2, and the planetary gear reducer 3 are connected in this order from top to bottom.
The parallel shaft gear reducer 2 includes: a driving shaft 21 and a driving gear 22, a driven shaft 23 and a driven gear 24, a secondary driving gear and a secondary driven gear, and an output shaft 25.
The driving shaft 21 is arranged in parallel with the driven shaft 23 and the output shaft 25, so that the driving gear 22 is in meshing transmission with the driven gear 24, and the driving gear and the driven gear adopt helical teeth or herringbone teeth. In the transmission process of the helical teeth or herringbone teeth, the driving gear is always contacted with the driven gear, so that the transmission is stable and the noise is low.
An external spline is arranged on the motor shaft 11, an inner hole is arranged on the driving shaft 21, and an internal spline is arranged in the inner hole. The motor shaft 11 is inserted into the inner hole of the driving shaft 21, so that the motor 1 is in transmission connection with the parallel shaft gear reducer 2, and the connection mode has the advantages of compact structure and high transmission efficiency.
The output shaft 25 of the parallel shaft gear reducer 2 is in driving connection with the sun gear 31 of the planetary gear reducer 3 through splines. The reduction ratio is improved by providing a plurality of stages of planetary gear reducers 3. Meanwhile, the reduction ratio of the planetary gear reducer 3 is controlled within a proper range to limit the input speed of the planetary gear reducer 3 and control the noise of the electro-hydraulic unit.
The application also relates to an electric machineshop car, include: traveling system and hydraulic system, hydraulic system includes: the hydraulic unit provides driving force for the hydraulic cylinder. The hydraulic unit adopts the electric hydraulic unit. The electro-hydraulic unit can adopt a high-rotating-speed low-torque motor with low cost and small volume; meanwhile, after the speed is reduced by the parallel shaft gear reducer, the input speed of the planetary gear reducer can be reduced, the noise of the electric hydraulic unit is reduced, and the transmission stability is improved.
In summary, the following steps: the utility model has the advantages that: the motor in the electro-hydraulic unit is connected with the hydraulic pump after being decelerated by the parallel shaft gear reducer and the planetary gear reducer, and the technical scheme can adopt a high-rotating-speed and low-torque motor with low cost and small volume; meanwhile, after the speed is reduced by the parallel shaft gear reducer, the input speed of the planetary gear reducer can be reduced, the noise of the electric hydraulic unit is reduced, and the transmission stability is improved.
The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, so all equivalent technical solutions should also belong to the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims.
Claims (9)
1. An electro-hydraulic unit for a work vehicle, comprising: motor (1), reduction gear and hydraulic pump (4), its characterized in that: the speed reducer includes: the parallel shaft gear reducer (2) and the planetary gear reducer (3), and the motor (1) is in transmission connection with the hydraulic pump (4) through the parallel shaft gear reducer (2) and the planetary gear reducer (3).
2. The engineering vehicle electro-hydraulic unit of claim 1, characterized in that: the parallel shaft gear reducer (2) includes: the driving shaft and the driven shaft are arranged in parallel, so that the driving gear and the driven gear are in meshing transmission, and the driving gear and the driven gear adopt helical teeth or herringbone teeth.
3. The engineering vehicle electro-hydraulic unit of claim 2, characterized in that: the planetary gear reducer (3) is a multi-stage planetary gear reducer.
4. The engineering truck electro-hydraulic unit of claim 3, characterized in that: the motor (1), the parallel shaft gear reducer (2) and the planetary gear reducer (3) are sequentially connected from top to bottom.
5. The engineering truck electro-hydraulic unit of claim 4, characterized in that: the motor (1) and the parallel shaft gear reducer (2) are integrally assembled and molded.
6. The engineering truck electro-hydraulic unit of claim 5, characterized in that: the hydraulic pump (4) adopts a gear pump, a roots pump, a vane pump or a plunger pump.
7. The electric hydraulic unit of the engineering truck according to any one of claims 1 to 6, characterized in that: the rotating speed of the motor (1) is not less than 6000 revolutions per minute.
8. The engineering vehicle electro-hydraulic unit of claim 7, characterized in that: the motor (1) adopts a permanent magnet motor.
9. An electric work vehicle comprising: traveling system and hydraulic system, hydraulic system includes: hydraulic unit and pneumatic cylinder, hydraulic unit provides drive power for the pneumatic cylinder, its characterized in that: the hydraulic unit adopts the electric hydraulic unit of the engineering truck as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220978284.1U CN217582401U (en) | 2022-04-26 | 2022-04-26 | Electric hydraulic unit of engineering truck and electric engineering truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220978284.1U CN217582401U (en) | 2022-04-26 | 2022-04-26 | Electric hydraulic unit of engineering truck and electric engineering truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217582401U true CN217582401U (en) | 2022-10-14 |
Family
ID=83543255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220978284.1U Active CN217582401U (en) | 2022-04-26 | 2022-04-26 | Electric hydraulic unit of engineering truck and electric engineering truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217582401U (en) |
-
2022
- 2022-04-26 CN CN202220978284.1U patent/CN217582401U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1948876B1 (en) | A working machine and a method for operating a working machine | |
| US7954574B2 (en) | Offset drive system for utility vehicles | |
| CN103370218B (en) | The hydrostatic power transmission system of accumulator auxiliary and optimization method thereof | |
| US10639982B2 (en) | Working machine and a method for operating a working machine | |
| US7980073B2 (en) | Hybrid system for a powertrain and hydraulic system | |
| CN101091025A (en) | Working machine | |
| EP2610517A2 (en) | Hydraulic system, driving system and electric vehicle | |
| CN111236353B (en) | Novel energy-saving electric loader driving control system and control method | |
| CN102022303A (en) | Dual-driving oil pump and control system thereof | |
| CN102785694A (en) | Hydraulic system for controlling vehicle to realize two-way travelling | |
| CN201288721Y (en) | Energy recovery system of mixed power single-valve multiple actuator assembly | |
| CN217582401U (en) | Electric hydraulic unit of engineering truck and electric engineering truck | |
| CN203924155U (en) | High-efficient energy-saving environment friendly oil-liquid hybrid electric excavator | |
| JP5152530B2 (en) | Hybrid earth mover | |
| CN203532688U (en) | Continuously variable transmission of high-power tractor | |
| CN104005435A (en) | Efficient energy-saving environment-friendly oil-hydraulic hybrid powder excavator | |
| CN116221209A (en) | Hydraulic system for hybrid gearbox and automobile | |
| CN211106986U (en) | Novel three-motor pure electric loader drive control system | |
| CN2804052Y (en) | Static pressure driven internal combustion forklift | |
| CN219315865U (en) | Loader double-motor driving system with upper part | |
| CN218000319U (en) | Electric unit of engineering truck and electric engineering truck | |
| CN219467526U (en) | Electrohydraulic integrated loader power transmission system | |
| CN2291407Y (en) | Double hydraulic motor driving device for electric balanced heavy-duty fork-lift truck | |
| CN218407704U (en) | Electric hydraulic unit of engineering truck and electric engineering truck | |
| CN217898712U (en) | Power take-off module and power control system based on power take-off module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |