Transmission mechanism of electric-control electrocar door

Abstract

The invention discloses a transmission mechanism of an electric-control electrocar door, which comprises an electrocar door system (1) and a door head mechanism (7), wherein the electrocar door system (1) consists of left and right door leaves (1-1) and a shifting fork (1-2). The transmission mechanism is characterized in that a door control unit (6) sends an instruction, a motor drives a screw to rotate, and nuts drive the shifting fork and the door leaves to make linear motion in an axis direction of the screw, so that the opening and the closing of the electrocar door are achieved. According to the transmission mechanism, a locking device and a transmission device are integrated; a small-diameter part achieves the quick opening and closing of the electrocar door; the closing speed is increased to 1.5-4.5s; point contact is formed between a spheroidal guide wheel and a guide rail, so that the frictional resistance is less, and the frictional heat is kept in the original level when the guide wheel rolls; noise cannot be increased; the screw, the nuts, and a helical pair achieves self-lubrication, so that the running states are ensured without oil injection; the maintenance cost is lowered; and the more advanced, more reasonable, safer and quicker electrocar door system is formed.

Description

technical field [0001] The invention relates to the transmission, guidance and mechanical locking device of the electrically controlled electric door of rail transit vehicles, in particular to a variable-diameter screw nut transmission mechanism for low friction and heat reduction. Background technique [0002] Electric control electric doors for rail vehicles are widely used in railways and urban rail trains. It is mainly composed of door leaf, driving mechanism, transmission device, guiding device, locking device, door control unit (DCU) and door head mechanism. The driving mechanism is the power source, which drives the transmission device, turns the rotary motion into a linear motion, and transmits it to the door leaf to realize the opening and closing of the door leaf. The guide device defines the running track of the door leaf. After the door is closed, the locking device must ensure that the door cannot be opened when the motor stops and no torque is applied to the ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the defects of slow closing speed and complex locking action of the existing electronically controlled electric vehicle door, the purpose of the present invention is to provide a transmission mechanism for electronically controlled electric vehicle doors, which adopts a combination of increased pitch (lead) and variable diameter. The auxiliary transmission mechanism forms a more advanced, reasonable, safe and fast door system

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