Blickle solution makes a difference with dead man's brakes autonomous transportation system

Heavy duty twin castors LS-GBS 82K-EMDSB-906018:

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The customer

... is a family company and a global player based in Germany. With over 17,000 employees worldwide, the system supplier has successfully developed individual drive solutions for clients from a wide variety of industries.
Trennlinie

The challenge

The client needs castors with a safe braking system when developing a new autonomous, intelligent, self-organising DTS (driverless transport system). The payload of this transportation assistant should be 1000 kg - that means that a load-bearing capacity of 500 kg per castor is required. The system should move along at a speed of 1 m/s and be able to, for example, lift containers up to 80 mm. A positioning accuracy of +/- 2 mm must be maintained for this. As the device is only 30 cm high, the mounting height of the castors is restricted.
  Trennlinie

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Our solution

Due to the low mounting height and high load capacity requirements, it was clear to the Blickle experts that heavy duty twin castors were the only solution. For this demanding application, our constructors developed a customised castor with cast iron and forged steel casing parts. The elastic polyurethane tread Blickle Besthane® Soft also offers good floor preservation and maximum operational comfort, with very low rolling resistance.

As conventional braking mechanisms could not be integrated into the castor, the specialists worked on a new solution, consisting of an electromagnetically controlled drum brake, using the dead man principle. This means that the brake is locked without power in normal condition, and is electromagnetically opened before the journey. The dead man's brake firstly acts as a travel brake and secondly as a locking unit, and represents a major safety function for the device as a whole. The Blickle castor solution was put through its paces on the client's testing premises; after a variety of braking, rolling and driving tests, and some minor constructive adjustments, the unit passed all tests. The CE declaration of conformity was then granted, giving the go ahead for a successful partnership.


Product advantages and technical information LS-GBS 2K-EMDSB-906018:
• Compact bracket, made of robust cast iron and forged components
• Electromagnetically controlled drum brakes, based on the dead man principle
• Very high brake retaining forces (> 1700 N per castor), combined with very low castor height
• Controls fall within the low voltage range (24 V), and only 3 volts in the retaining area.
• Can also be used as driving brakes, with high braking performance (emergency braking function > 40 Nm)