| General Information About The LinearChain |
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Users can choose from a number of different systems for linear motion applications in industrial equipment. These generally involve hydraulic/pneumatic cylinders or electro-mechanical lead and ball screw drives.
The Framo Pushpull Chain represents an impressive new development of a simple principle.
It is a special kind of chain which, unlike the conventional mechanism, becomes rigid when operated under thrust load, but can still be looped and driven by a conventional sprocket wheel (see Fig.1). The Framo Pushpull Chain can realize thrust forces of up to 35 kN.
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(fig. 1) |
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(fig. 2)
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The classic power transmission system involving a continuous chain with at least two sprocket wheels and a tensioning element is replaced by an "open-ended" chain with two free ends. The drive can be located wherever it is most convenient (see Fig. 2).
The chains are given their push force characteristics by incorporating specially shaped side links that engage and support each other with very little axial play (see Fig. 3). |
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The load is attached to the end of the chain, for example, with bolts or any preferred arrangement, such as a latching mechanism or trunnion using the mounting holes provided.
The other, free end of the chain can be guided to individual requirements. To keep the space required to a minimum, it is generally rolled up in a storage facility (see Fig. 2). The ease with which the overall length can be minimized is one of the main advantages of the Framo "Push-Pull Chain" system.
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(fig. 3) |
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| Examples for LinearChain Storage Geometry |
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The main applications for LinearChains are in effecting the push-pull movement of large and medium-sized loads in any direction (including vertical movement). The chain sprocket can be driven by a gear motor, or if preferred a hydraulic motor.
Depending on the pushing force, length and travel speed required, the LinearChain can be configured to run on a given sliding surface, or a special guide channel can also be supplied if preferred.
Standard chain sizes with 25, 40, and 60 mm pitch are kept in stock, ensuring that an optimum solution can be offered on short deliveries.
Special hardened steel is generally used for the chain links (and there is also the option of stainless or annealed steel).
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