VINCENT Systems GmbH manufactures advanced prosthetic solutions. The prostheses for everyday movement have to work very precisely and withstand high loads in some cases. This also applies to the bearing technology used on all axes involved in the movement. The iglidur plastic plain bearings are also lubrication-free, corrosion-free and maintenance-free and fulfil the high requirements for use in this application.
Hand prostheses are becoming more flexible, delicate and functional and have become more and more similar to their human model. For people who have to live with the loss of individual fingers or a part of the hand, there has been no satisfactory prosthesis solution. The VINCENT finger closes this gap and opens up new opportunities for those affected. The company VINCENT Systems GmbH manufactures fingers for the everyday movement and thus offers prosthesis users an opportunity for a better existence in everyday life.
A clearance-free and wear-free transmission of forces is of great importance especially in the field of this very precise and sometimes heavily stressed application. The special requirements stem primarily from point loads that are caused by rapid and impulsive or oscillating movements.
A hand prosthesis must also be able to cope in very harsh environments in some cases and remain fully functional in dirty or wet application areas. Finally, a solution had to be found that would work in the smallest of installation spaces and that could be implemented with an aesthetically sophisticated design.
This prosthesis is an electrically powered finger. The joint at the base of the finger is moved directly via a gear motor, which carries along the middle joint via a flexible connection. All axes involved in this movement are mounted through plastic bushings made of iglidur J. A total of 8 such bearings are integrated in one finger. The control system of the prosthesis works via muscle signals, which are forwarded to a microcontroller. The energy supply is provided by 2 lithium-ion batteries.
The bearings machined from iglidur J bar stock are corrosion-resistant and have a low wear rate. Lubrication-free and maintenance-free properties are also two important criteria for use on the body, which the plastic plain bearings fulfil. In addition, they reduce the transmission of sound of the motor to adjacent joints to avoid complications. However, the bearing solution also fulfils the potential use in dirty or wet application areas with a long service life at the same time.
The "IceMole" is a melting probe, with which the polar regions, glaciers and as a long-term objective, extraterrestrial regions are to be explored. The bearing of the ice screw must be insensitive to water and dirt, and thermally insulating. In this demanding environment, a part machined from iglidur® A180 bar stock is used.
For the "Dual Tube Night Vision Goggles", one of ACTinBlack's highest quality night vision goggles, a custom plain bearing was needed to enable pivoting pods. These bearings should withstand the same environmental conditions as the night vision systems. Temperatures between -50 and 50 degrees Celsius are no rarity. Stability in case of improper treatment and a good stick-slip behaviour were also relevant for this vision aid. The bearing was made of iglidur® bar stock, as these are adapted to the conditions of use.
At the so-called tyre "soaping" station of MCSS MC-Syncro Supply GmbH, among other things, the inner bead of the tyre is moistened with soap by means of brushes. As a result, the grease gets washed out over time from encapsulated metal bearings. The result was that the metal bearings jammed and the shaft continued to rotate. Since iglidur® bar stock bearings have been in use, not only is the lubrication of the bearings dispensed with, but also costs associated with regular failure and replacement of bearings are also avoided.