Pull rod returning mechanism

Abstract

The invention relates to a pull rod returning mechanism which comprises an electronic speed regulator, a motor stirring fork part, a pull rod and a returning elastic part, wherein the motor stirring fork part comprises a stirring fork claw, a stirring fork shaft and a stirring fork ball head; the stirring fork ball head and the stirring fork shaft are fixed on the stirring fork claw respectively; the stirring fork claw is connected with the pull rod; the stirring fork ball head is arranged on the electronic speed regulator rotationally; the returning elastic part is arranged on the motor stirring fork part in the rotating way, and is elastically tightened or loosened along with the rotation of the motor stirring fork part driven by the electronic speed regulator; the returning elastic part, the motor stirring fork part and the electronic speed regulator are positioned in the same rotating center. According to the pull rod returning mechanism, the motor stirring fork part is driven by a torsion spring to rotate to realize rotary movement, works in a manner which is the same as that of the electronic speed regulator (driven by a stepper motor to rotate), and is positioned in the same rotating center with the electronic speed regulator, so that the contact stress of the stirring fork ball head and the electronic speed regulator is more reasonable; the pull rod returning mechanism is simple in structure, convenient and attractive in appearance, and has good returning effects.

Description

technical field [0001] The invention belongs to the technical field of fuel injection pump control, and in particular relates to a pull rod return mechanism. Background technique [0002] When the diesel engine is working normally, the electronic governor drives the motor fork part to adjust the left and right movement of the tie rod, so as to control the amount of fuel supplied by the fuel injection pump to adjust the state of the diesel engine. However, when the diesel engine needs to be shut down, the electronic governor will be powered off, and now the pull rod often stops rotating thereupon. If the pull rod stops at the non-oil cut-off position, the fuel injection pump cannot cut off the oil, and the engine will not be able to stop in time. [0003] Adjust the pull rod back, so that the fuel injection pump is at the cut-off position. The tie rod is a transitional device connecting the fuel injection pump and the electronic governor. When the diesel engine needs to be ...

AI Technical Summary

Problems solved by technology

However, when the diesel engine needs to be stopped, the electronic governor will cut off the power, and the pull rod will stop rotating at this time. If the pull rod stops at the non-fuel cut-off position, the fuel injection pump will not be able to cut off the fuel, and the engine will not be able to stop in time.

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