Mast height control unit for forklifts

Mast height control unit for forklifts

A mechatronic system can automatically position the mast on industrial vehicles, such as forklifts. Integrated sensor bearings detect mast height and convey rotational speed and direction feedback from the ac motor.

Accurate mast height control is important when forklifts quickly move from place to place, placing or retrieving pallets or containers to and from bin locations. Through a simple readout of the mast’s height compared to a pre-programmed shelf height, sensor bearings on the mast will automatically position it to the desired height with the push of the button or the flip of a switch.

The control unit mounts on the mast to monitor its location as it travels up or down and sends a continuous signal to the controller. These signals are interpreted into precise measurements. Using either a pre-programmed mast height system or a simple digital readout system, the vehicle “knows” the height of the load and can trigger other safety systems.

For example, the forklift’s safety controls can be programmed to limit speed or turning radius, depending on the height of the load, reducing the possibility of the vehicle tipping over.

Alternatively, the safety system can prevent the mast from rising beyond a specified height when the load exceeds a predetermined weight.

Two different designs have been created for mast control units. A spring-loaded cam arrangement uses spring force to press the sensor bearing against the mast. This unit is driven directly by the moving frame of the mast. Pulley arrangement units are driven by either a wire or belt incorporated into the design of the mast-positioning system.

Both the cam and pulley control units respond directly to a designer’s need for smaller components, simpler assembly, and reliable performance.

Surgical and patient tables

Surgical equipment must meet stringent hygiene standards and perform reliably and consistently. In medical applications, electro-mechanical actuation systems have distinct advantages over conventional hydraulics. Without hydraulic fluids, there are no leaks to contaminate operating or patient rooms. The usually quiet electro-mechanical systems foster a lower stress environment for patients.