What type of swivel joints are installed on a type 4 hoseless pantograph?

The type of swivel joints installed on a type 4 hoseless pantograph are designed to accommodate the specific needs of such systems, including load distribution and movement flexibility. Non-lubricated swivel joints are advantageous because they eliminate the need for maintenance that comes with lubrication, thus reducing the potential for leaks and the overall need for upkeep. This is crucial in applications where reliability and low maintenance are priorities.

The use of flanged connections in this context allows for easier assembly and disassembly, facilitating repairs or replacements when necessary. Flanged joints provide a robust, secure attachment method that can handle the stresses of operation while allowing some degree of flexibility in alignment, which is beneficial for the dynamic operation of pantograph systems.

In contrast, lubricated joints would require more maintenance and may introduce contaminants. Welded joints offer a permanent fixture but lack the ease of serviceability that flanged joints provide. Therefore, the combination of non-lubricated and flanged joint types aligns optimally with the operational and maintenance objectives for a type 4 hoseless pantograph.