Smooth-running and durable plain bearings in monitor pivot arms in hospitals

Profile

• What was needed: iglidur G plain bearings, iglidur thrust washers
• Requirements: The plain bearings must allow easy swivel arm adjustment and must function without lubrication or maintenance.
• Industry: medical equipment
• Success for the customer: iglidur plain bearings and thrust washers offer a quiet and smooth operation due to low coefficients of friction.

With the height-adjustable pivot arm, patients in hospitals can comfortably watch TV and make phone calls.

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► Thrust washer iglidur W300
► sample box iglidur plain bearings

Problem

However, the first height-adjustable pivot arm developed in early 2000 was not for everyday office needs, but for medical technology. Siemens turned to a mechanical engineering company from the Münster region for this task, asking it for an individual solution for a TV/telephone system mount for patient beds in hospitals. The television arm had to move very smoothly and be individually adjustable so that the patient can orient the screen according to his individual needs with little effort. So the passionate designer developed a height-adjustable pivot arm.
For the television adjustment mechanism, it was looking for a plain bearing that would allow problem-free adjustment over a swivel arm swivel range from -18 to +38 degrees from the horizontal. The television support can also be tilted from -30 to +20 degrees. In order to implement these movements smoothly, the company relied primarily on lightweight components such as steel, aluminium and plastic in its design. Hygiene regulations in hospitals meant that the bearing point could not be lubricated. Plain bearings with a long service life have the great advantage that they require no replacement.

Solution

The search for arm bearings led the specialist directly to our bearing products. Since our bearings have been used in medium-sized company products for decades, leaving the customers completely satisfied, this decision was not a difficult one.
A total of eight plain bearings made of iglidur G, a wear-resistant, high-performance plastic are used in each arm. Like all iglidur polymers, the all-rounder material is lubrication-free so it requires no maintenance. Another consideration is noise intensity. The plain bearings are very quiet during motion whilst ensuring adequate support. The customer was also concerned with price.
The family business uses igus high-performance polymers not only in the height-adjustable pivot arm, but also in other television adjustments. For example, iglidur plain bearings and thrust washers are used for new monitor adjustment mechanisms in a large American phone company. In the new adjustment system, the monitor-turning mechanism uses an iglidur W300 thrust washer. The lubrication-free endurance runner's main features are its low coefficients of friction, very long service life, and extremely high wear resistance. An iglidur G plain bearing ensures that the device carrier tilts easily and quietly.

An iglidur G plain bearing and an iglidur W300 thrust washer ensure that the screen holder of the new monitor adjustment can be both tilted and rotated smoothly and lubrication-free.

Eight plain bearings are used to support the height-adjustable pivot arm.