Patent · US Active

Method for producing a gear worm which is located in particular on an armature shaft, and such a gear worm

US11904381B2 · kind B2 · utility

0Cited by

18References

12Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Jie Bao · Shanghai, CN
Bernhard De Graaff · Karlsruhe, DE
Daniel Cettier · Karlsruhe, DE
Guang Qiao · Shanghai, CN
Holger Thoene · Rastatt, DE
Otmar Hertwig · Steinbach, DE
Volker Hertweck · Baden-Baden, DE

Key dates

Filing date	Oct 4, 2019
Grant date	Feb 20, 2024
Priority date	—
Expiry date	Oct 3, 2040

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60N2/02253
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The invention relates to a method for producing a gear worm (12) which is located in particular on an armature shaft (14) of an electromotive drive unit (10), wherein firstly a worm gear (20) having screw flanks (22) axially opposite one another on a longitudinal axis (18) is formed by means of a rolling tool, and subsequently a groove structure (24) which is concentric about the longitudinal axis (18) is formed on the screw flanks (22) by means of an additional process step. The invention also relates to a gear worm (12) produced according to the method according to the invention, and to a transmission drive unit (10) containing such a gear worm (12).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.