Compact Plus coupling fits into a small envelope

Edited by the Engineeringtalk editorial team Jul 3, 2009

Schmidt-Kupplung's Semiflex Compact Plus range features a compact design and functional attributes that allow integration into tight spaces in conjunction with parallel shift options.

The couplings have outer diameters of 70 to 120mm, making them easy to assemble by means of friction locking clamp hubs - optionally with split-clamp hubs.

Depending on the type of coupling involved, the drive elements for this product line offer a compact design that is identical or up to 27 per cent shorter than the outer diameter of the coupling size.

Depending on the size, the compact couplings compensate radial misalignment up to 3mm in conjunction with a specified limited design length.

In this system, two pairs of parallel links arranged at 90 degrees to each other transmit rotary motion and torque.

These link the input and output sides with the central disc.

The connecting links can be swivelled on the pin located on the discs.

They are usually mounted by means of a needle bearing.

Lateral misalignment is compensated purely by the swivel motion of the pair of connecting links.

This method for compensating radial misalignment thus demands only a small axial design length.

For precise torque transmission, this coupling range with clamp hubs offers a torsional stiffness of 13 to 140kNm/rad, depending on coupling size.

This compact coupling system can compensate radial misalignment in a transport system.

So-called roller conveyors are usually required for transporting small goods of low weight and compact dimensions.

Here, the small goods are conveyed along transport rollers arranged transverse to the direction of conveyance.

Driven systems are used whenever goods being conveyed are to be stopped so that transport can be resumed at a later point in time.

In other words, these conveyor systems frequently work with varying transportation rates or in fixed-cycle operations.

In many cases, the individual rollers are driven by a servomotor and an outer central shaft, with the conveyor rollers driven by individual sets of bevel gears.

To achieve a complete conveyance system, individual modules are combined and linked in a modular system.

This combination should save space and have a compact connecting element; the coupling system used must be able to equalise assembly inaccuracies and misalignment of up to 1.5mm between the individual part modules, for example those resulting from adjusting the conveyor level.

The best solution for this problem is the size C 320 Semiflex Compact Plus coupling.

In accordance with the system working in fixed-cycle operation, a friction-locking shaft connection in the form of a radially operated clamp hub was selected for both sides, optionally with a clamp hub in split design on one side if one part module is to be radially removed or replaced.

The coupling size, with an outer diameter of 120mm, has a total design length of 88mm, making it a compact design that allows the required compact connection between the individual part modules.

Despite this axial compactness, the torsionally rigid coupling - this size has a torsional rigidity of 73kNm/rad - can compensate radial misalignment of up to 3mm along with any resulting assembly inaccuracies.

The select series coupling from the Semiflex, Controlflex and Schmidt-Kupplung product ranges can by downloaded into the design.

After the technical developer follows the steps on Schmidt-Kupplung's website and is taken to the tailor-made product, they can then download the selected torsionally stiff shaft coupling.

All current 2D and 3D CAD formats are available.

Using the drop-down menu, the designer can define the bore combinations of the driving end and output side within the permissible bore diameter range of the coupling size and hub version.

The final technical drawing thus corresponds exactly to the customer design requirement.