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:
Jan. 08, 2002
Filed:
Nov. 08, 2000
Toshiaki Makino, Kudamatsu, JP;
Michio Sebata, Kudamatsu, JP;
Motomi Hiraishi, Kudamatsu, JP;
Minoru Nakamura, Kudamatsu, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A traction link of a bogie frame is connected to a connection member which extends down from a car body. In an interior portion of the connection member, a large number of particle-shaped members are accommodated. The rotation vibrations which are generated from a system drive of a running electric motor, a reduction gear unit and a shaft coupling are transmitted to the connection member and the car body through the traction link. The vibration energy generated in the connection member is converted to kinetic energy in the particle-shaped members by collisions between the particle-shaped members inside the connection member and, so that the vibrations in the connection member can be reduced. Accordingly, the propagation of the vibrations to the car body can be restrained. In a railway vehicle bogie car, the vibrations which are generated by an unbalance of the drive system can be restrained, and the noise inside the car produced by the vibrations can be reduced.