A Modular Gearbox Electric Oil Pump

Abstract

The invention relates to the technical field of automobile structure, in particular to a modular transmission electric oil pump. It includes an integrated filter module, an oil pump module, a motor module and a control module; the control module is electrically connected to the motor module; the motor module is connected to the oil pump module to drive the oil pump module to run; the oil inlet of the oil pump module It communicates with the oil outlet of the filter module; the filter module includes a first filter structure for coarse filtration and a second filter structure for fine filter arranged in sequence along the oil flow direction, and the second filter structure is arranged in the filter module One-way channel structure that allows oil to flow directly from the oil outlet of the filter module after passing through the first filter structure when the flow resistance is greater than the set pressure due to blockage. The invention has simple structure, high integration degree, greatly facilitates installation and disassembly, optimizes the space arrangement in the gearbox casing, and has great popularization and application value.

Description

technical field [0001] The invention relates to the technical field of automobile structure, in particular to a modular transmission electric oil pump. Background technique [0002] In the application of various automatic transmissions and new energy hybrid transmissions, electric oil pumps are more and more widely used, which can provide oil pressure control sources for hydraulic systems such as clutches or hydraulic parking mechanisms, and can also provide The heat dissipation of the wet clutch friction plate, or the heat dissipation of the high-power generator / drive motor in the hybrid transmission provides active cooling flow, and it can also provide the bearings in the transmission that are difficult to contact the transmission oil through splashing by conventional methods. Provides active lubrication. [0003] In hydraulic and cooling applications in gearboxes, hydraulic actuators such as clutches and hydraulic parking mechanisms generally contain hydraulic piston cyl...

AI Technical Summary

Problems solved by technology

[0003] In hydraulic and cooling applications in gearboxes, hydraulic actuators such as clutches and hydraulic parking mechanisms generally contain hydraulic piston cylinders, and rubber seals are used to provide sealing functions between the piston and the cylinder, so the working force The cleanliness of the oil has high requirements; in addition, in the heat dissipation of the wet clutch friction plate, the impurity particles in the cooling oil will cause the paper-based friction material of the friction plate to fail in a short period of time, and the impurities in the cooling oil may also It will adhere to the air gap surface of the stator and rotor of the generator / drive motor, which will have a great impact on the performance of the motor. Oil impurities will also cause early wear between the bearing friction pairs, thus affecting the operation of the bearing and the inner shaft teeth of the gearbox smooth

Therefore, the above occasions require the working oil to have a high degree of cleanliness. The usual design scheme is to design the electric oil pump and the filter separately and install them into the gearbox housing as two components. Therefore, it is necessary to install two The installation interface of the components also needs to process the complicated housing oil passage between the filter and the oil pump, which is not conducive to improving the design integration

[0004] In addition, in the conventional electric oil pump design scheme, usually after an electric oil pump assembly product is designed, it can only have specific working parameters: such as motor power, oil pump displacement, speed range, etc. It is popularized and used in different gearbox application environments. If multiple applications are to be met, the entire electric oil pump assembly needs to be completely redesigned, which is not conducive to cost control

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