CN218407704U - Electric hydraulic unit of engineering truck and electric engineering truck - Google Patents
Electric hydraulic unit of engineering truck and electric engineering truck Download PDFInfo
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- CN218407704U CN218407704U CN202222289866.1U CN202222289866U CN218407704U CN 218407704 U CN218407704 U CN 218407704U CN 202222289866 U CN202222289866 U CN 202222289866U CN 218407704 U CN218407704 U CN 218407704U
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Abstract
The utility model discloses an electric hydraulic unit of machineshop car and electric machineshop car, the electric hydraulic unit of machineshop car includes: the motor is in transmission connection with the hydraulic pump through the parallel shaft gear reducer. For powering the hydraulic cylinder. The engineering vehicle electro-hydraulic unit adopts the parallel shaft gear reducer with the input shaft and the output shaft coaxial, can completely eliminate the bending moment generated by eccentric installation of the motor, enables the stress of the engineering vehicle electro-hydraulic unit shell to be in an optimal state, can reduce the shell wall thickness of the engineering vehicle electro-hydraulic unit, and reduces the weight and the cost.
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 the electromotion of 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 size of the motor can directly lead to the obstruction of the product research and development process.
In the existing engineering vehicle electro-hydraulic unit: the motor is in transmission connection with the hydraulic pump after passing through the parallel shaft gear reducer, and the motor, the parallel shaft gear reducer and the hydraulic pump are vertically installed from top to bottom. Because the output shaft of the existing parallel shaft gear reducer deviates from the input shaft (non-coaxial), the motor of the electric unit of the engineering truck is arranged on the hydraulic pump in a cantilever mode. When the eccentricity between the output shaft and the input shaft is large, the shell of the electric hydraulic unit of the engineering truck needs to bear the bending moment generated by eccentric installation of the motor, the stress state is not ideal, the wall thickness of the shell of the electric hydraulic unit of the engineering truck needs to be increased, the weight is increased, the cost is increased, and therefore improvement is needed.
Through patent retrieval, the following patents have a certain relationship with the present application:
1. the utility model discloses a utility model patent that application number is "202220978284.1", application date is "2022.04.26", the name is "engineering car electro-hydraulic unit and electronic engineering car", the applicant is "taoise gear limited responsibility company", this utility model patent discloses an engineering car electro-hydraulic unit and electronic engineering 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.
2. The utility model discloses a utility model patent that application number is "202220977764.6", application date is "2022.04.26", the name is "electric rotating system and electric engineering car of machineshop car", the applicant is "taoise gear limited responsibility company", this utility model patent provides an electric rotating system and electric engineering car of machineshop car, including motor, reduction gear and rotary platform reduction gear by parallel axis gear reducer and planetary gear reducer constitute, the parallel axis gear reducer of motor, planetary gear reducer, rotary platform connect gradually and form the electric rotating system of a machineshop car. The electric rotary system of the engineering truck and the motor of the electric engineering truck are connected with the rotary platform after being reduced 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 a rotary system is reduced, and the NVH of a transmission system is effectively controlled.
However, the motors of the hydraulic units Cheng Chedian in the above patents are all mounted on the planetary gear reducer in a cantilever manner, and there is an adverse effect caused by bending moment generated by eccentric mounting of the motors.
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 of a work vehicle, comprising: the hydraulic pump comprises a motor, a parallel shaft gear reducer and a hydraulic pump which are vertically installed, wherein the motor is in transmission connection with the hydraulic pump through the parallel shaft gear reducer. The parallel shaft gear reducer includes: the input shaft, the intermediate shaft and the output shaft are arranged in parallel, and the input shaft and the output shaft are arranged on the same side of the intermediate shaft; the input gear is in meshing transmission with the intermediate gear, the intermediate gear is in meshing transmission with the output gear, and the eccentricity between the input shaft and the output shaft is less than or equal to 100mm. Through the mode that sets up intermediate gear and countershaft, both can increase the reduction ratio, can reduce the eccentric distance of input shaft and output shaft again to reduce the produced moment of flexure of motor eccentric mounting, improve the atress state of engineering car electro-hydraulic unit casing, reduce the casing wall thickness of engineering car electro-hydraulic unit, reduce weight and cost.
Furthermore, the input shaft and the output shaft are coaxial, so that the bending moment generated by eccentric installation of the motor is completely eliminated, and the stress of the shell of the electric hydraulic unit of the engineering truck is in an optimal state.
Furthermore, the input gear, the intermediate gear and the output gear adopt helical teeth or herringbone teeth. So as to improve the transmission stability and reduce the noise of the electric unit.
Further, the hydraulic pump adopts a gear pump, a roots pump, a vane pump or a plunger pump.
Further, the motor, the parallel shaft gear reducer and the hydraulic pump are sequentially connected from top to bottom. The vertical installation mode not only enables the weight of the motor, the parallel shaft gear reducer and the hydraulic pump to be vertically transmitted, and the bending moment generated by the weight is minimum, but also can reduce the required installation surface and improve the space utilization rate on the engineering truck.
Furthermore, the motor, the parallel shaft gear reducer and the planetary gear reducer share a cavity, and the motor adopts an internal circulation oil cooling motor.
Further, the motor speed is not less than 6000 rpm, and the high-speed and low-torque motor is low in cost.
Furthermore, the motor adopts a permanent magnet motor, so that the motor efficiency is improved, the volume and the weight are reduced, and the cost is reduced.
An electric engineering truck adopts above-mentioned engineering truck electro-hydraulic unit. The electric hydraulic unit of the engineering truck can adopt a high-rotating-speed low-torque motor with low cost and small volume. When the input shaft and the output shaft of the parallel shaft gear reducer are coaxial, the bending moment generated by eccentric installation of the motor can be completely eliminated, so that the stress of the shell of the electric hydraulic unit of the engineering truck is in an optimal state, the wall thickness of the shell of the electric hydraulic unit of the engineering truck can be reduced, and the weight and the cost are reduced.
The utility model has the advantages that: the engineering vehicle electro-hydraulic unit adopts the parallel shaft gear reducer with the input shaft and the output shaft coaxial, so that the bending moment generated by eccentric installation of the motor can be completely eliminated, the stress of the engineering vehicle electro-hydraulic unit shell is in an optimal state, the shell wall thickness of the engineering vehicle electro-hydraulic unit can be reduced, and the weight and the cost are reduced.
Drawings
Figure 1 is a schematic diagram of the electric hydraulic unit of a engineering truck in the prior art,
figure 2 is a schematic cross-sectional view of an electro-hydraulic unit of a prior art engineering truck,
figure 3 is a schematic diagram of an embodiment of the present application,
figure 4 is a schematic diagram of the second embodiment of the present application,
figure 5 is a schematic cross-sectional view of an embodiment of the present application,
in the figure: 1-motor, 2-parallel shaft gear reducer, 21-input shaft, 22-intermediate shaft, 23-output shaft, 3-hydraulic pump, P-eccentricity of motor central line and parallel shaft gear reducer output shaft.
Detailed Description
The invention will be further described by means of specific embodiments and with reference to the accompanying drawings:
as shown in fig. 1 and 2, the electric hydraulic unit of the engineering truck comprises: a motor 1, a parallel shaft gear reducer 2 and a hydraulic pump 3. The motor 1 is connected with the hydraulic pump 3 from top to bottom through the parallel shaft gear reducer 2 in a transmission way. The parallel shaft gear reducer 2 includes: the input shaft 21 and the input gear, and the output gear and the output shaft 23, the input shaft 21 and the output shaft 23 are arranged in parallel, because the motor 1 and the input shaft 21 of the parallel shaft gear reducer 2 are usually coaxially connected through a spline, a flat key or a coupling, the output shaft 23 of the parallel shaft gear reducer 2 and the input shaft of the hydraulic pump 3 are also coaxially connected through a spline, a flat key or a coupling, when the output shaft 23 of the parallel shaft gear reducer 2 deviates from the input shaft 21 (different shafts), the central line of the motor 1 deviates from the central line of the input shaft of the hydraulic pump 3, and the motor 1 is installed in a cantilever manner. The weight of the motor 1 will now produce a bending moment which will be borne by the electrical unit housing. When the eccentricity P between the central line of the motor 1 and the input shaft of the hydraulic pump 3 is larger than 100mm, the generated bending moment is larger, the stress state of the shell of the electric unit is not ideal, and the wall thickness needs to be increased to increase the strength so as to bear the bending moment generated by the weight of the motor 1.
In the embodiment of the application, as shown in fig. 3, a motor 1 in an electric hydraulic unit of the engineering truck is sequentially connected with a hydraulic pump 3 from top to bottom through a parallel shaft gear reducer 2 to provide power for the hydraulic cylinder, so that the engineering truck can carry out excavation or loading operation. In the parallel shaft gear reducer 2 of the first embodiment, the intermediate gear and the intermediate shaft 22 are provided, and when the output shaft 23 and the input shaft 21 are on the same side of the intermediate shaft 22, the eccentricity P1 between the output shaft 23 and the input shaft 21 can be reduced. The bending moment generated by eccentric installation of the motor 1 is reduced, the stress state of the shell of the electric hydraulic unit of the engineering truck is improved, the wall thickness of the shell of the electric hydraulic unit of the engineering truck is reduced, and the weight and the cost are reduced.
The input gear, the intermediate gear and the output gear adopt helical teeth or herringbone teeth. So as to improve the transmission stability and reduce the noise of the electric unit. The rotating speed of the motor 1 is not less than 6000 rpm, and the cost of the high-rotating-speed low-torque motor is low.
In the second embodiment of the present application, as shown in fig. 4 and 5, by controlling the diameter of the gear, the output shaft 23 and the input shaft 21 can be located on the same axis (the output shaft 23 and the input shaft 21 are coaxial), the bending moment generated by eccentric installation of the motor can be completely eliminated, and the stress of the housing of the electric hydraulic unit of the engineering truck is in the optimal state.
The electric engineering truck of this application adopts above-mentioned engineering truck electro-hydraulic unit. The electric hydraulic unit of the engineering truck can adopt a high-rotating-speed low-torque motor with low cost and small volume. When the input shaft and the output shaft of the parallel shaft gear reducer are coaxial, bending moment generated by eccentric installation of the motor can be completely eliminated, so that the stress of the shell of the electric hydraulic unit of the engineering truck is in an optimal state, the wall thickness of the shell of the electric hydraulic unit of the engineering truck can be reduced, and the weight and the cost are reduced.
To sum up, the beneficial effects of the utility model are that: the engineering vehicle electro-hydraulic unit adopts the parallel shaft gear reducer with the input shaft and the output shaft coaxial, so that the bending moment generated by eccentric installation of the motor can be completely eliminated, the stress of the engineering vehicle electro-hydraulic unit shell is in an optimal state, the shell wall thickness of the engineering vehicle electro-hydraulic unit can be reduced, and the weight and the cost are reduced.
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 engineering truck electro-hydraulic unit comprises a vertical installation: motor (1), parallel shaft gear reducer (2) and hydraulic pump (3), motor (1) is connected its characterized in that through parallel shaft gear reducer (2) and hydraulic pump (3) transmission: the parallel shaft gear reducer (2) comprises an input shaft (21), an input gear, a middle shaft (22), an output gear and an output shaft (23), wherein the input shaft (21), the middle shaft (22) and the output shaft (23) are arranged in parallel, and the input shaft (21) and the output shaft (23) are arranged on the same side of the middle shaft (22); the input gear is in meshing transmission with the intermediate gear, the intermediate gear is in meshing transmission with the output gear, and the eccentricity (P) between the input shaft (21) and the output shaft (23) is less than or equal to 100mm.
2. The engineering vehicle electro-hydraulic unit of claim 1, characterized in that: the input shaft (21) is coaxial with the output shaft (23).
3. The engineering vehicle electro-hydraulic unit of claim 2, characterized in that: the input gear, the intermediate gear and the output gear adopt helical teeth or herringbone teeth.
4. The engineering truck electro-hydraulic unit of claim 3, characterized in that: the hydraulic pump (3) adopts a gear pump, a roots pump, a vane pump or a plunger pump.
5. The electric hydraulic unit of the engineering truck according to any one of claims 1 to 4, characterized in that: the motor (1), the parallel shaft gear reducer (2) and the hydraulic pump (3) are sequentially connected from top to bottom.
6. The engineering truck electro-hydraulic unit of claim 5, characterized in that: the motor (1) and the parallel shaft gear reducer (2) share a cavity, and the motor (1) adopts an internal circulation oil cooling motor.
7. The engineering truck electro-hydraulic unit of claim 6, characterized in that: the rotating speed of the motor (1) is not less than 6000 rpm.
8. The engineering vehicle electro-hydraulic unit of claim 7, characterized in that: the motor adopts a permanent magnet motor.
9. An electric engineering vehicle is characterized in that: the electric hydraulic unit of the engineering truck according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222289866.1U CN218407704U (en) | 2022-08-30 | 2022-08-30 | Electric hydraulic unit of engineering truck and electric engineering truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222289866.1U CN218407704U (en) | 2022-08-30 | 2022-08-30 | Electric hydraulic unit of engineering truck and electric engineering truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218407704U true CN218407704U (en) | 2023-01-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222289866.1U Active CN218407704U (en) | 2022-08-30 | 2022-08-30 | Electric hydraulic unit of engineering truck and electric engineering truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218407704U (en) |
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2022
- 2022-08-30 CN CN202222289866.1U patent/CN218407704U/en active Active
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