Electric drive axle power take-off mechanism

Abstract

The utility model provides a power take-off mechanism of an electric drive axle, which enables a power take-off device to be arranged according to actual requirements, does not need to be additionally provided with a power take-off motor, further reduces occupied space of a power take-off component, and reduces energy consumption. The electric drive axle assembly comprises a drive motor and a convex power take-off shaft; a power take-off conversion device for converting the mechanical energy of the drive shaft into hydraulic energy; a transmission pipeline; the hydraulic power execution device is used for converting hydraulic energy into mechanical energy for power output; a convex power take-off shaft of the electric drive axle assembly is connected with the input end of the power take-off conversion device, the hydraulic output end of the power take-off conversion device is connected with the input end of the hydraulic power execution device through a connecting pipeline, and a power output shaft of the hydraulic power execution device is used for being directly or indirectly connected with the power input end of operation equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of power take-off mechanisms, specifically an electric drive bridge power take-off mechanism. Background Technology

[0002] With the continuous development of automotive technology, electric drive axle assemblies are being used more and more widely in vehicles. In many work scenarios, vehicles need to be equipped with power take-off (PTO) drive units to achieve specific operational functions, such as ash blowing in powder tank trucks, tracked trailers, and concrete mixer trucks. However, existing electric drive axle assemblies are compact in terms of vehicle space, and the space around the PTO is very limited.

[0003] When a large power take-off (PTO) unit is required, such as the PTO with a pulley needed in the ash blowing scenario of a powder tanker truck, the pulley is too large to be installed on the PTO of the electric drive axle. In this case, the vehicle often has to install an additional PTO motor for operation, which not only increases the cost and complexity of the vehicle, but also occupies more vehicle space. At the same time, the additional PTO motor also increases energy consumption and maintenance costs. Utility Model Content

[0004] To address the aforementioned issues, this invention provides an electric drive bridge power take-off mechanism, which allows the power take-off device to be arranged according to actual needs without the need for an additional power take-off motor, thereby reducing the space occupied by the power take-off component and reducing energy consumption.

[0005] An electric drive bridge power take-off mechanism, characterized in that it comprises:

[0006] The electric drive axle assembly includes a drive motor and a protruding power take-off shaft;

[0007] A power take-off (PTO) device that converts the mechanical energy of the drive shaft into hydraulic energy;

[0008] Transmission pipelines;

[0009] And hydraulic power actuators, which convert hydraulic energy into mechanical energy for power output;

[0010] The protruding power take-off shaft of the electric drive bridge assembly is connected to the input end of the power take-off conversion device. The hydraulic output end of the power take-off conversion device is connected to the input end of the hydraulic power actuator through a connecting pipeline. The power output shaft of the hydraulic power actuator is used to directly or indirectly connect to the power input end of the working equipment.

[0011] Its further features are:

[0012] The power take-off conversion device is a power take-off oil pump, which includes a pump body, an oil pump suction port, and an oil pump outlet.

[0013] The hydraulic power actuator is a hydraulic motor, which includes a motor oil inlet, a motor oil outlet, and a power output shaft;

[0014] The hydraulic motor is an axial piston hydraulic motor with a total output efficiency of 0.8-0.9, which can efficiently convert hydraulic energy into mechanical energy, improving the working efficiency of the entire power take-off system. The axial piston hydraulic motor has the characteristics of high speed, strong pressure bearing capacity, large output torque and long service life, and is suitable for various working scenarios with high efficiency and performance requirements, ensuring the stable and reliable operation of the power take-off system.

[0015] The protruding power take-off shaft of the electric drive bridge assembly is connected to the input end of the power take-off oil pump, the oil pump outlet is connected to the motor inlet through a transmission pipeline, and the power output shaft is used to directly or indirectly connect to the power input device of the working equipment.

[0016] The power take-off shaft of the drive motor is connected to the input shaft of the power take-off oil pump through a clutch device, which ensures that when the working equipment does not require power input, the power input of the power take-off oil pump can be directly turned off through the clutch device;

[0017] Preferably, the clutch device is an electromagnetic clutch, which ensures reliable and stable clutch engagement;

[0018] The transmission pipeline is reasonably set according to the distance between the oil pump outlet and the motor inlet and the pipe arrangement position of the vehicle body.

[0019] When the power input device of the working equipment is a pulley, the power output shaft is externally connected to a power output pulley. At this time, the input shaft of the working equipment is fitted with an input pulley. The power output pulley is connected to the input pulley via a belt. The working equipment is reasonably arranged according to the space of the vehicle body and its own volume. It reliably transmits power through the belt. Due to the combined use of the transmission pipeline and the belt, the working equipment, regardless of its size, can be reasonably arranged in the corresponding position in the space of the vehicle body.

[0020] By adopting this utility model, the installation position of the power take-off device is transferred from the position of the electric drive axle power take-off shaft to the external hydraulic power actuator, which effectively solves the problem that the space around the electric drive axle power take-off device is limited and cannot accommodate a large power take-off device; moreover, it does not require the addition of a power take-off motor, reducing equipment purchase costs, as well as energy consumption costs and maintenance costs. Attached Figure Description

[0021] Figure 1 This is a simplified structural diagram of a specific embodiment of the present utility model;

[0022] The names corresponding to the serial numbers in the diagram are as follows:

[0023] Differential assembly 1, transmission 2, drive motor 3, power take-off shaft 4, wheel 5, clutch device 6, power output pulley 7, input pulley 8;

[0024] Electric drive axle assembly 10, transmission pipeline 20, power take-off oil pump 30, pump body 31, oil pump suction port 32, oil pump outlet 33, hydraulic motor 40, motor inlet port 41, motor outlet port 42, power output shaft 43, air pump 50. Detailed Implementation

[0025] An electric drive bridge power take-off mechanism, see Figure 1 It includes an electric drive axle assembly 10, a power take-off conversion device, a transmission pipeline 20, and a hydraulic power actuator;

[0026] In practical implementation, the electric drive axle assembly 10 includes a differential assembly 1, a transmission 2, a drive motor 3, and a protruding power take-off shaft 4. The output end of the electric drive axle assembly 10 is connected to the input end of the differential assembly 1, and the output end of the differential assembly 1 is connected to the corresponding wheel 5 through a half-shaft.

[0027] The power take-off conversion device converts the mechanical energy of the drive shaft into hydraulic energy. The power take-off conversion device is a power take-off oil pump 30, which includes a pump body 31, an oil pump suction port 32, and an oil pump outlet 33.

[0028] The hydraulic power actuator converts hydraulic energy into mechanical energy for power output; the hydraulic power actuator is a hydraulic motor 40, which includes a motor oil inlet 41, a motor oil outlet 42, and a power output shaft 43;

[0029] The power take-off shaft 4 of the electric drive axle assembly 10 is connected to the input end of the power take-off oil pump 30, the oil pump outlet 33 is connected to the motor inlet 41 through the transmission pipeline 20, and the power output shaft 43 is used to directly or indirectly connect to the power input device of the working equipment.

[0030] In a specific embodiment, the hydraulic motor 40 is an axial piston hydraulic motor with a total output efficiency of 0.8-0.9, which can efficiently convert hydraulic energy into mechanical energy, thereby improving the working efficiency of the entire power take-off system. The axial piston hydraulic motor has the characteristics of high speed, strong pressure bearing capacity, large output torque, and long service life, and is suitable for various working scenarios with high efficiency and performance requirements, ensuring the stable and reliable operation of the power take-off system.

[0031] In a specific embodiment, the power take-off shaft 4 of the drive motor 3 is connected to the input shaft of the power take-off oil pump 30 through the clutch device 6, which ensures that when the working equipment does not require power input, the power input of the power take-off oil pump 30 can be directly shut off through the clutch device; in specific implementation, the clutch device 6 is an electromagnetic clutch, which ensures reliable and stable clutch operation.

[0032] In practice, the transmission pipeline 20 is reasonably set according to the distance between the oil pump outlet 33 and the motor inlet 41 and the pipe arrangement position of the vehicle body.

[0033] In a specific embodiment, the working device is an air pump 50. The power output shaft 43 of the hydraulic motor 40 is externally connected to a power output pulley 7. At this time, an input pulley 8 is sleeved on the input shaft of the air pump 50. The power output pulley 7 is connected to the input pulley 8 through a belt (not shown in the figure, but can be reasonably set according to the requirements). The air pump 50 is reasonably arranged according to the space of the vehicle body and its own volume. It reliably transmits power through the belt. Due to the combined use of the transmission pipeline 20 and the belt, the working device, regardless of its size, can be reasonably arranged in the corresponding position in the space of the vehicle body.

[0034] It possesses the following technological advantages:

[0035] Highly adaptable hydraulic power actuator module: An axial piston hydraulic motor is selected as the hydraulic power actuator, making full use of its characteristics of high speed, strong pressure resistance, large output torque and long service life; at the same time, a power take-off device such as a pulley adapted to different working equipment is installed at the output end of the hydraulic motor, and through belt drive, it can achieve efficient drive of various working equipment such as air pumps, greatly improving the applicability of the system.

[0036] The systematic power take-off (PTO) process consists of a complete, efficient, and logically clear process, from starting the electric drive axle to drive the oil pump, to the transmission of hydraulic energy, and then to the hydraulic motor converting hydraulic energy into mechanical energy to drive the working equipment. Each link in this process works closely together and is interconnected to ensure that the entire PTO system can operate stably and efficiently, meeting the power take-off needs of the vehicle in different working scenarios.

[0037] The power take-off system consists of the following components: the oil pump on the electric drive axle power take-off device, the transmission pipeline connecting the oil pump and the axial piston hydraulic motor, and the power take-off device such as the axial piston hydraulic motor and the pulley installed at its output end.

[0038] Energy conversion and transmission mechanism: The energy conversion and transmission mechanism of the electric drive axle mechanical energy into hydraulic energy through the oil pump, and the hydraulic energy transmitted to the axial piston hydraulic motor through the transmission pipeline;

[0039] Power take-off method process: Starting from the start of the electric drive axle, it goes through the process of converting mechanical energy into hydraulic energy, transmitting hydraulic energy, and then converting hydraulic energy back into mechanical energy to drive the working equipment;

[0040] The protection system is designed to optimize the selection of key components such as axial piston hydraulic motors and their compatibility with other components for different working scenarios. Through appropriate component selection and adaptation, the power take-off system can achieve efficient and stable operation in various working conditions.

[0041] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electric drive axle power take-off mechanism, characterized in that, It includes: Electric drive axle assembly, including driving motor, outer convex power take-off shaft; Power take-off conversion device, which converts the mechanical energy of the driving shaft into hydraulic energy; Transmission pipeline; And hydraulic power execution device, which converts hydraulic energy into mechanical energy for power output; The outer convex power take-off shaft of the electric drive axle assembly is connected to the input end of the power take-off conversion device, the hydraulic output end of the power take-off conversion device is connected to the input end of the hydraulic power execution device through the connecting pipeline, and the power output shaft of the hydraulic power execution device is used for directly or indirectly connecting the power input end of the working equipment.

2. The electric drive axle power take-off mechanism of claim 1, wherein: The power take-off conversion device is a power take-off oil pump, which includes a pump body, an oil pump oil suction port and an oil pump oil outlet port.

3. The electric drive axle power take-off mechanism of claim 2, wherein: The hydraulic power execution device is a hydraulic motor, which includes a motor oil inlet, a motor oil outlet and a power output shaft.

4. The electric drive axle power take-off mechanism of claim 3, wherein: The hydraulic motor is an axial plunger type hydraulic motor with an output total efficiency of 0.8-0.

9.

5. The electric drive axle power take-off mechanism of claim 3, wherein: The outer convex power take-off shaft of the electric drive axle assembly is connected to the input end of the power take-off oil pump, the oil pump oil outlet is connected to the motor oil inlet through the transmission pipeline, and the power output shaft is used for directly or indirectly connecting the power input device of the working equipment.

6. An electric drive axle power take-off mechanism as set forth in claim 5 wherein: The power take-off shaft of the driving motor is connected to the input shaft of the power take-off oil pump through the clutch device.

7. An electric drive axle power take-off mechanism according to claim 6, characterized in that: The clutch device is an electromagnetic clutch.

8. The electric drive axle power take-off mechanism of claim 5, wherein: The transmission pipeline is reasonably arranged according to the distance between the oil pump oil outlet and the motor oil inlet and the pipe arrangement position of the vehicle body.

9. The electric drive axle power take-off mechanism of claim 5, wherein: When the power input device of the working equipment is a belt pulley, the power output shaft is provided with a power output belt pulley, and at this time, an input belt pulley is arranged on the input shaft of the working equipment, and the power output belt pulley is connected to the input belt pulley through a belt.

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