Spring bar coupling
A spring bar coupling, also known as a compensating coupling, is a torsionally rigid (torsionally rigid) coupling . Nevertheless, it allows to compensate for axial, radial and angular shaft misalignments ( lat. Angular = angular). It consists of only one component and therefore has a low mass moment of inertia .
history
This type of coupling was developed in 1985 by VMA GmbH, which patented this compensating coupling and the associated special slot structure on November 23, 1989.
construction
By milled recesses being in a cylindrical body rotating body soft. Depending on how the slots are arranged, the cylindrical body is given three degrees of freedom (in the translational axes x, y and z). The construction enables one-piece production from various machinable materials, including stainless steel , steel , aluminum , titanium and PEEK .
application
Spring bar couplings are often frictionally connected to the input and output by means of clamping screws . They are used to connect two shaft ends, which can have misalignments during operation . The advantage of such a connection lies in the above-mentioned offset compensation options and a reduction in vibration resonance.
The symmetrical slot structure enables high torsional strength . The slots can be milled in at angles of 180 ° or 120 °, depending on the requirements. The so-called spring bar is created by overlapping the slot packages. This makes it possible to compensate for the axial offset . The width of the slots enables angular compensation. Together, these two components are important for lateral compensation.