Elevator Limit Switch Hitachi TKB-1A TKB-1B TKB-1C TKB-1D Elevator Parts

Hitachi elevator cam switch is an operating switch that uses a cam mechanism to control the opening or closing of the elevator circuit. By twisting the operating handle, the cam can be rotated to control the opening and closing of the contacts. This switch plays a key role in limiting and protecting the elevator system, ensuring that the elevator runs within a safe range and avoiding dangerous situations such as collision or exceeding the track.

The working principle of Hitachi elevator cam switch is based on the rotation of the cam. When the manual wheel is driven by the shaft, the cam will rotate accordingly, causing the contact to connect or disconnect with the fixed contact. When the cam is in a certain position, the contact will close, making the circuit in a closed state; when the cam is shifted so that the rotor is on the flange, the contact will open, making the circuit in a disconnected state. Due to the different shapes of the cam pieces, the closing rules of these contacts are also different to meet different control requirements.

The core components of the cam switch are the camshaft and the cam. The camshaft is driven by a motor or other device to make the cam rotate. One or more contact points are installed on the cam, and these contact points are connected to the fixed contact points through springs or other structures. When the cam rotates, the contact state between the contact points and the fixed contact points will change. To ensure safety, the key switches of cam switches are usually lockable to prevent accidental operation.

Hitachi elevator cam switch is usually installed on the track, car or door of the elevator to detect the travel and position of the elevator, thereby achieving precise control of the elevator movement.

Hitachi elevator cam switches are an indispensable safety component in elevator systems.

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