Locking device for sliding door

Abstract

The invention discloses a locking device for a sliding door, which comprises a tapered end assembly and a limiting mechanism, wherein the tapered end assembly is driven by an electromagnet sliding shaft to upwards move and falls off to a latch hook; the limiting mechanism is used for limiting the electromagnet sliding shaft in falling off; the tapered end assembly is fixed with a cross rod; the middle of the cross rod is fixed on the electromagnet sliding shaft; the side of the cross rod is positioned below a position switch and presses or leaves from a contact of the position switch along the vertical movement of the electromagnet sliding shaft; the limiting mechanism is arranged below the electromagnet sliding shaft and comprises a spring, a limiting rod with a groove for accommodating the sliding shaft and a limit connecting plate; the limiting rod passes through two spaced fixed blocks to slide; a spring is sleeved on the reducing part of the limiting rod; one end of the spring is fixed with the fixed blocks; the other end of the spring is fixed with the limiting rod; the limit connecting plate is fixed on one end of the limiting rod, which extends out of the fixed blocks; the electromagnet sliding shaft falls into the groove of the limiting rod by the movement of the limit connecting plate; and the position switch gives out a signal to a controller for displaying unlocking information. The locking device has the advantages of higher accuracy in control, safety and reliability, simple structure and low cost.

Description

technical field [0001] The invention relates to a locking device for a sliding door, in particular to a push-pull sliding door that can be used in places such as subway platforms and platforms. Background technique [0002] The existing locking device for sliding doors includes a lock head and a lock hook. Generally, the lock head fixed on the sliding door frame and moving with the sliding door directly hits the lock hook in the lock body to realize the automatic locking function. Such a structure often causes the lock body to have a complicated structure and a larger production cost. Under the continuous impact of the lock head, it is easy to cause damage to the lock hook, or even be directly smashed, resulting in inaccurate door locking, or even the situation that the door cannot be locked. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a locking ...

AI Technical Summary

Problems solved by technology

Such a structure often results in a complex lock body with a large volume and high production costs.

Under the continuous impact of the lock head, it is easy to cause damage to the lock hook, or even be directly damaged, resulting in inaccurate locking of the door, or even failure to lock the door

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