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  4. Bearing technology for pulley block module

Pulley module for excavator

In use with high forces, weather, strong vibrations and dust

Profile

What was needed: 
Double joints, fixed flange bearings, thrust washers and aluminium shafts for a pulley module

Requirements: 
High-load, weather-resistant bearing technology that can be used under heavy dust loads

Industry: 
Construction machinery

Success for the customer: 
Maintenance-free and reliable bearing positions, plain bearings with a predictable service life. Lead screw nuts specially developed for this application for trapezoidal lead screws
Excavator with pulley module
Excavator with pulley module

Working at a depth of 65 metres

Ets Payant, a French company, produces a pulley module which is attached under an excavator boom and moves earth out of pits up to 65 metres deep. All components must withstand weather conditions, dust and severe impacts. That is why the design engineers used igubal W300 double joints, iglidur P fixed flange bearings, iglidur G thrust washers, and drylin R aluminium shafts.
 
The pulley module is designed for a conventional 40-ton hydraulic excavator and consists of a winch module and a hose reel. It weighs just under 7 tons and is attached to the boom of the excavator with a quick coupling system. In addition, there is the guide roller module, which is also attached to the end of the shovel of the bucket with a quick coupling system. 

Used in underground railway construction

The excavator with pulley module is used, for example, in the construction of underground railway lines that pass underneath the already existing underground railway network. It is therefore used in urban areas and must therefore be as compact and easy to transport as possible. In fact, the dimensions in the transport position with the hose reels folded in are identical to those of the conventional excavator.
 
With its grab, the excavator can move large quantities of earth out of the underground tunnels and load a whole 5 tons of material in one swoop. Loads and forces acting on the machine are thus considerable. Added to this are the weather, strong vibrations and dust. The operating conditions for all components are therefore demanding.
Excavator with pulley module in transport position

You can find the products used here

iglidur fixed flange bearing
iglidur thrust washers
igubal double joints
drylin lead screw nuts
drylin lead screws
drylin linear guides

名稱 "Apiro", "AutoChain", "CFRIP", "chainflex", "chainge", "chains for cranes", "ConProtect", "cradle-chain", "CTD", "drygear", "drylin", "dryspin", "dry-tech", "dryway", "easy chain", "e-chain", "e-chain systems", "e-ketten", "e-kettensysteme", "e-loop", "energy chain", "energy chain systems", "enjoyneering", "e-skin", "e-spool", "fixflex", "flizz", "i.Cee", "ibow", "igear", "iglidur", "igubal", "igumid", "igus", "igus improves what moves", "igus:bike", "igusGO", "igutex", "iguverse", "iguversum", "kineKIT", "kopla", "manus", "motion plastics", "motion polymers", "motionary", "plastics for longer life", "print2mold", "Rawbot", "RBTX", "readycable", "readychain", "ReBeL", "ReCyycle", "reguse", "robolink", "Rohbot", "savfe", "speedigus", "superwise", "take the dryway", "tribofilament", "triflex", "twisterchain", "when it moves, igus improves", "xirodur", "xiros" 和 "yes" 是 igus® GmbH/科隆在德意志聯邦共和國以及某些外國適用的情況下受法律保護的商標。這是商標的非詳盡清單（例如igus® GmbH 或igus®在德國、歐盟、美國和/或其他國家或司法管轄區的附屬公司的待審商標申請或註冊商標。

igus® GmbH points out that it does not sell any products of the companies Allen Bradley, B&R, Baumüller, Beckhoff, Lahr, Control Techniques, Danaher Motion, ELAU, FAGOR, FANUC, Festo, Heidenhain, Jetter, Lenze, LinMot, LTi DRiVES, Mitsubishi, NUM, Parker, Bosh Rexroth, SEW, Siemens, Stöber and all other drive manufacturers mentioned on this website. The products offered by igus® are those of igus® GmbH.