Gemmer steering
The Gemmer steering , also called roller steering , is a type of worm steering with rolling instead of sliding friction . The British inventor Henry Marles developed it in 1919 and had it patented. The name Gemmer-Lenkung goes back to the US-American manufacturer "Gemmer Manufacturing Co." , who manufactured such steering gears and had their designs manufactured under license. In Germany they were produced by ZF .
In order to reduce steering forces and wear, instead of a gear sector, a roller mounted transversely on the steering lever shaft with two or three circumferential teeth engages in the steering worm at the end of the steering column. This is designed as a globoid worm, that is, its diameter increases towards the ends, since the width of the worm wheel (i.e. the roller) is too small to be able to intervene in a cylindrical worm over the entire pivoting angle of about 90 degrees.
Web links
- The ZF Gemmer steering system , Zahnradfabrik Friedrichshafen AG (PDF 3.3 MB), accessed on March 3, 2016
- Picture of a Gemmer steering of the BMW 02
literature
- Trzebiatowsky, Spaethe: Motor vehicle trade, specialist apprenticeship , Verlag Dr. Max Gehlen 1964
Individual evidence
- ↑ https://patents.google.com/patent/US1720911 Patent, filed in 1922
- ↑ http://www.triumph-roadster.de/workshop/Marles-steering-box-2.pdf A British patent from 1919 is mentioned in this text