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:
Oct. 04, 2005
Filed:
Oct. 28, 2003
Seiichi Mogi, Saitama, JP;
Kiyoshi Kimura, Saitama, JP;
Seiichi Mogi, Saitama, JP;
Kiyoshi Kimura, Saitama, JP;
Honda Motor Co., LTD, Tokyo, JP;
Abstract
A motor drive unitcomprises an input shaft, a countershaft, a couple of helical gears, a housingand a seventh bearing. The input shaftis connected with the rotor shaftof an electrical motor M for driving a vehicle, and the countershaftis disposed in parallel with the input shaft, for rotational connection leading to drive wheels of the vehicle. The helical gears comprise a first gearand a second gear, which enable power transmission from the input shaftto the countershaft, and the housingcovers and retains the electrical motor M. The seventh bearingis mounted in the housing, and it retains rotatably the end of the rotor shaftthat is located opposite to the coupled portionof the rotor shaftand the input shaft. At the coupled portion, a wave springis sandwiched between the rotor shaftand the input shaft, so that the wave springpushes the rotor shaftand the input shaftaxially away from each other, with the rotor shaftpushing the housingaxially via the seventh bearing. Furthermore, the drive unit is arranged such that while the electrical motor M is in operation, an axial thrust acting on the input shaftfrom the first gearpushes the input shaftto the rotor shaft. In this arrangement, the pushing force by which the rotor shaftpushes the housingis variable in correspondence to the operational condition of the electrical motor M.