The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2014
Filed:
Jul. 17, 2012
Jinn-fa Wu, Taichung, TW;
Chiu-hung LI, Taichung, TW;
Hsi-hung Hsiao, Taichung, TW;
Chin-mou Hsu, Taichung, TW;
Jinn-Fa Wu, Taichung, TW;
Chiu-Hung Li, Taichung, TW;
Hsi-Hung Hsiao, Taichung, TW;
Chin-Mou Hsu, Taichung, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A backlash eliminating device for helical gears is provided for a gear transmission system which includes a transmission shaft, two helical gears and a match gear. A sleeve mounted on the transmission shaft has an outer wall, an inner wall and at least two sections of spiral grooves penetrating through the outer wall and the inner wall. The sleeve includes a transmission part and two extremity parts. The transmission part is disposed between the spiral grooves, and is fixedly connected to the transmission shaft. The extremity parts are disposed outside of the spiral grooves. The helical gears are fixedly connected to the two extremity parts. The sleeve having the spiral grooves provides a preload spring force along an axial direction of the transmission shaft, so that the two helical gears are tightly engaged with the match gear.