Platform door drive unit

Abstract

The invention discloses a platform door driving unit which is composed of a driving motor, a gear seat, a gear, a rack, a motor braking assembly and a manual unlocking assembly, the gear seat is installed on a platform door bottom plate and penetrates through a gap of a platform door rail, the gear is horizontally arranged in the gear seat, and the gear and the rack are meshed below the platform door rail. An output shaft of the driving motor extends into the gear seat and is connected with the gear; the driving motor controls the gear to move along the rack; the motor braking assembly is used for locking a motor shaft of the driving motor after power losing, and the door body in-place locking function is achieved. And the manual unlocking assembly is used for manually unlocking the motor shaft of the driving motor by the motor braking assembly, so that the motor shaft of the driving motor rotates smoothly. The full-open movable type platform door is compact in structure, convenient to drive and control and safe, stable and reliable in operation, the door body is automatically locked in place and in power failure and automatically reset in power failure, and the problems that a full-open movable type novel platform door is difficult to drive and control, difficult to lock in place and poor in safety and reliability are fundamentally solved.

Description

technical field [0001] The invention relates to the technical field of rail transit platform doors, in particular to a platform door driving unit. Background technique [0002] Rail transit stations generally set platform doors at the edge of the platform to isolate the rail area from the waiting area. The purpose is to ensure the normal operation of the train and the safety of passengers, improve the waiting environment, and enhance the comfort of passengers waiting for the train. Most of the existing rail platform doors are fixed platform doors. This type of platform door has a fixed opening position and limited door opening. It is suitable for urban rail such as subway, light rail, or other single-type rail platforms. However, due to various reasons, the platforms of high-speed railways and intercity railways in our country have the needs of various types of trains to park on the platforms, and the accuracy of the parking positions of the trains is lower than that of the...

AI Technical Summary

Problems solved by technology

However, when there are some special working conditions in the platform door system, for example, the motor may rotate forward or reverse when the door is opened, the end position of the movement is uncertain, and the door body needs to be locked at different positions. The traditional platform door braking device loses its adaptability and reliability, and cannot provide a reliable basis for the safety requirements of the system

The above problems pose a major challenge to the safety and reliability of this new type of platform door

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