(19)
(11) EP 2 202 127 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.03.2011 Bulletin 2011/13

(43) Date of publication A2:
30.06.2010 Bulletin 2010/26

(21) Application number: 09251097.3

(22) Date of filing: 15.04.2009
(51) International Patent Classification (IPC): 
B61F 5/10(2006.01)
B61H 9/00(2006.01)
 B61F 5/52(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA RS

(30) Priority: 26.12.2008 JP 2008332806

(71) Applicant: Hitachi Ltd.
Chiyoda-ku Tokyo 100-8280 (JP)

(72) Inventors:
  • Takahira, Takashi
    Chiyoda-ku Tokyo 100-8220 (JP)
  • Watanabe, Takao
    Chiyoda-ku Tokyo 100-8220 (JP)
  • Hiraishi, Motomi
    Chiyoda-ku Tokyo 100-8220 (JP)

(74) Representative: Paget, Hugh Charles Edward et al
Mewburn Ellis LLP 33 Gutter Lane
London EC2V 8AS
London EC2V 8AS (GB)

   


(54) Bogie of railway vehicle


(57) The invention provides a bogie of a railway vehicle capable of reducing the stress applied to the welding portion between brake gear attachments and transoms, promoting weight reduction and cutting down the number of production steps. The bogie of a railway vehicle comprises a bogie frame (5a) composed of side beams (10) which are spaced apart and arranged in parallel and transoms (20) passing through the longitudinal centre portions of the side beams (10), two wheel sets each having wheels (240) attached to both ends of an axle (230), brake gears (56) and air springs (210). Air spring bearing racks (50) are arranged so that both ends of transoms (20) pass through the longitudinal centre portion of the air spring bearing racks, so that the stress caused by the moment applied on the brake gear attachments (54a) during braking can be reduced. Furthermore, since each air spring bearing rack and brake gear attachments (54a) are formed in an integral manner, the number of steps required for manufacturing the components and the number of steps required for attaching the components to the bogie frame can be cut down.







Search report