car oil drain device

Abstract

An automobile engine oil draining device comprises an underframe, an electro-hydraulic oil cylinder, an oil tank, a motor, a rotating shaft I, a rotating disc, a driving rod, a gear pump, a rubber hose and a three-way valve. Used engine oil flows into an oil delivery pipe II through an oil guide hole via the three-way valve under the action of gravity, and finally is drained into the oil tank; when a flow sensor detects that the engine oil in the oil delivery pipe II slows down, a PLC controls an electric control valve to close and controls the motor to rotate; the motor drives the rotating disc to rotate through the rotating shaft I; the driving rod drives a hub to rotate; the PLC controls a gear pump driving mechanism to drive the gear pump to act at the same time; the gear pump pumps remaining engine oil out of an engine through an oil inlet, an oil pumping pipe connected with the oil inlet and the rubber hose; and the engine oil pumped out of the engine flows into an oil delivery pipe I through an oil outlet of the gear pump after turning at the three-way valve, and finally flows into the oil tank. Therefore, the automobile engine oil draining device ensures that all used engine oil is drained out of the engine; and after new engine oil is added into the engine, the automobile engine oil draining device can effectively avoid the situation that the new engine oil is mixed with used engine oil and thus goes bad.

Description

technical field

[0001] The invention relates to the field of automobile maintenance, in particular to an automobile engine oil draining device. Background technique

[0002] The service life of the engine oil of a car is generally 5000-10000 kilometers, so the maintenance manual of each car stipulates that the service life of the engine oil reaches the specified mileage and needs to be replaced with new engine oil. The traditional process of changing engine oil is to loosen the oil drain bolt at the bottom of the engine after the car is lifted, and then the old engine oil in the engine is discharged through the oil drain. After the engine oil is discharged, tighten the oil drain bolt to the oil drain port, and then add new oil from the oil filler port on the upper end of the engine. However, due to the viscosity of engine oil, a large amount of old engine oil will adhere to the cylinder wall, crankshaft, connecting rod and engine pan. Therefore, under the traditional oil di...

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