Variable tooth worm
US6176148A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1998 |
| Grant date | Jan 23, 2001 |
| Priority date | — |
| Expiry date | Jul 15, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19953
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a variable tooth worm of worm gear sets used for a gear transmission mechanism. It comprises a shaft body with thread teeth. Its tip surface is a cylinder or a crowning surface, and the reference circle of the tooth flank is a revolution of a curved line. The worm product is made with variable tooth thickness and variable tooth height. During the meshing period, its loading capacity and transmission efficiency are increased and the transmission performance approaches a more ideal state because it has a greater number of simultaneously-meshing teeth than a cylindrical worm and also gradually gets into and out of mesh. It has a lower number of simultaneously-meshing teeth than a toroidal worm during the transmission period so that it has the advantages of lower heat value, lower oil-agitating loss, lower requirements for center distance and adjustment of axial position, easier manufacture as well as better economy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.