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:
Mar. 11, 2025
Filed:
Feb. 20, 2021
Guangdong Zhaoqing L&v Co. Ltd., Guangdong, CN;
GUANGDONG ZHAOQING L&V CO. LTD., Guangdong, CN;
Abstract
A transmission gear box includes a cylindrical box body defining a cavity for gears and an end cover fixed on at least one axially opened end of the cavity of the box body. A fitting structure includes an inner fitting surface located on a surface of one of the box body and the end cover and an outer fitting surface located on a surface of the other one of the box body and the end cover. The inner fitting surface and the outer fitting surface are fixed to each other. A clearance fit area with interference fit areas located on both sides thereof is arranged between the inner fitting surface and the outer fitting surface such that during welding of the inner fitting surface to the outer fitting surface, a molten body produced by melting of the interference fit areas flows to the clearance fit area.