Stop mechanism of mechanical speed governor

Abstract

The invention relates to a stop mechanism of a mechanical speed governor, comprising a shutoff spindle and a shell, wherein the shutoff spindle is connected to the shell and is provided with a stop return spring. The stop mechanism of a mechanical speed governor is characterized in that a stop bush on one end of the shutoff spindle is in clearance fit to be pressed into a hole on one end of the shell; a leakproof structure is arranged between the stop bush and the shell and between the stop bush and the shutoff spindle; the other end of the shutoff spindle is provided with a choke plug stop bush; the choke plug stop bush is in clearance fit to be pressed into the hole on the other end of the shell; and a positioning boss is arranged between the end surface of the shutoff spindle and the choke plug stop bush. The invention has the beneficial effect on effectively solving the problem of seal oil leakage, the gyroscopic moment of a shutdown handle is lowered, the working resistance of the shutdown handle is lightened, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a parking mechanism of a mechanical governor for a high-pressure fuel injection pump of a diesel engine. Background technique [0002] The parking modes of existing automobile diesel engine oil pumps are mainly manual (wire rope), pneumatic, and electric parking modes, and its free state is inclined to the right end of the governor by 20 degrees under the action of the reset torsion spring or electromagnetic valve inside the housing. °, the parking mechanism does not work, the engine is in the starting or normal working state, when it is necessary to stop, the pull wire or solenoid valve is used to act, and the parking handle is pulled to the parking state position shown in the figure with the parking axis as the center of rotation, that is, tilting to the left At 20 degrees, the oil pump stops supplying oil, the engine stops working, and the parking requirement is met. [0003] The existing parking mechanism is easy to cause ...

AI Technical Summary

Problems solved by technology

[0003] The existing parking mechanism is easy to cause oil leakage after the oil pump has been used for a period of time. The main location of the oil leakage lies in the position of the interference press fit and the sealing ring at both ends of the shaft. The impulse between the bushing and the parking bush is very large, and the interference is caused to loosen and cause oil leakage. The two sealing rings at both ends also cause high friction. The early wear of the parking shaft causes the handle to sink and oil leakage, and the processing technology is cumbersome heavy workload

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