Revolving door mechanism for automatic entrance guard device

Abstract

The invention provides a revolving door mechanism for an automatic entrance guard device, which adopts the technical scheme that the revolving door mechanism for the automatic entrance guard device comprises a door spindle, a motor and a torque force transmission rod fixedly connected with the motor, the revolving door mechanism for the automatic entrance guard device is characterized in that the lower end of the torque force transmission rod is connected with a small shaft and a positioning plate coaxially fixed with the small shaft, a positioning notch is formed in the circumference of the lower end of the torque force transmission rod, and a positioning wheel is controlled by a torsion spring and matched with the positioning notch for accurate positioning during door spindle opening or closing; the upper and the lower gear shafts of a transmission are connected with the small shaft and an electromagnetic brake respectively, and the rotational speed of the lower gear shaft is faster than that of the upper gear shaft; the invention adopts the technical effects that the stopping accuracy of a revolving door is excellent, the repeatability of repeatedly opening or closing is better, a common friction brake type electromagnetic brake is adopted for replacing a castellated jaw clutch electromagnetic brake, and the mechanism noise is small.

Description

technical field [0001] The invention relates to the technology of an automatic access control device, in particular to a revolving door mechanism of an automatic ticket checking machine, in particular to a brake and positioning mechanism of the revolving door. Background technique [0002] Public places such as rail transit stations are usually equipped with automatic ticket gates to facilitate people's self-help through the access control. It is known that the revolving door type access control device is mainly driven by a motor to rotate the door shaft to realize the opening or closing of the door. What the prior art uses is a jaw-type electromagnetic brake. When the revolving door is opened or closed in place, the jaw-type electromagnetic brake is used. Brake brakes. The electromagnetic brake disclosed in the patent document with the publication number CN102839888A, which is applied to the door shaft driving device of the automatic ticket gate door, is the jaw type elect...

AI Technical Summary

Problems solved by technology

However, when this tooth-embedded electromagnetic brake brakes, the teeth need to mesh. When the teeth cannot mesh normally, a small additional rotation will occur before meshing, which affects the repeatability of the stop position of the revolving door, and the teeth knocking noise when teeth mesh

The existing friction brake type electromagnetic brake cannot be assembled in the access control mechanism due to its large outer diameter. Smaller ones can be assembled but the braking force is not enough, and the revolving door cannot stay in the open or closed position accurately.

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