Locking device, single-door drive system and double-door drive system

Abstract

The invention discloses a locking device. The locking device comprises a screw rod, and a door lock device is arranged on the screw rod; the door lock device comprises a locking block and a locking clamping groove, wherein the locking block is adjacent to a nut pair of the screw rod, and the locking clamping groove is formed in the screw rod; the locking block is screwed into the locking clampinggroove for axial locking under the rotation of one direction of the screw rod, and the locking block is screwed out of the locking clamping groove to carry out axial unlocking under the rotation of the other direction of the screw rod; the locking clamping groove comprises a step surface arranged on an polished shaft of the screw rod, and an arc-wedge-shaped clamping groove which is connected withthe step surface; and door lock supports which are rotationally connected with a sliding plug door are arranged outside the nut pair and the locking block. According to the locking device, the single-door drive system and the double-door drive, the automatic locking function and the unlocking function can be reliably completed; and in addition, the locking device further has the advantages of being few in parts, low in machining precision, simple in structure, and high in maintainability.

Description

technical field [0001] The invention relates to a locking device for a sliding door, in particular to a locking device for a train sliding door system based on a self-locking principle, a single door transmission system, and a double door transmission system. Background technique [0002] With the rapid development of my country's urban rail transit, the demand for urban rail vehicles, including subways, light rails, and trams, continues to increase, and the operating speed continues to accelerate. The main goal of urban rail vehicles is to quickly and safely transport a large number of passengers. The train sliding door is an important part of the rail vehicle, which directly affects the normal operation of the vehicle and the safety and sealing of passengers. It mainly involves machinery, electricity, software, Signaling, communication and other technologies; the locking device is one of the two key core systems in the train sliding door system. The safety, reliability and...

AI Technical Summary

Problems solved by technology

[0004] (1) Low reliability: the overall structure of the locking device currently used in the industry is complex, and the installation accuracy is relatively high, which reduces the reliability of the locking device;

[0005] (2) Short service life: At present, the pin shaft in the locking device in the industry has to slide along the groove of the ball screw during the process of opening and closing the door, so the diameter of the pin shaft is limited, so that the pin shaft is easy to wear and reduces the locking effect. Device life

[0006] Poor maintainability: Due to the complex structure of the locking device, easy to wear and other shortcomings, the maintenance period of the equipment is long, the maintenance frequency is high, and the maintenance cost is expensive.

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