Railcar bogie and railcar including same

Patent metadata

Field	Value
Publication number	US-9663121-B2
Application number	US-201414759756-A
Country	US
Kind code	B2
Filing date	Jan 6, 2014
Priority date	Jan 10, 2013
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

A railcar bogie includes: a cross beam extending in a car width direction and supporting a carbody; plate springs extending in a car longitudinal direction and supporting both respective car-width-direction end portions of the cross beam; axle boxes accommodating respective bearings for axles and supporting respective car longitudinal-direction end portions of the plate springs; plate spring receivers each located between the plate spring and the axle box and including an upper surface which is inclined toward a longitudinal-direction middle portion of the plate spring, the upper surface receiving the plate spring; and stoppers arranged so as to cover at least a part of an upper surface of the plate spring, the part being located above the axle box.

First claim

The invention claimed is:

1. A railcar bogie comprising:
a cross beam extending in a car width direction and supporting a carbody;
plate springs extending in a car longitudinal direction and supporting both respective car-width-direction end portions of the cross beam;
axle boxes accommodating respective bearings for axles and supporting respective car longitudinal-direction end portions of the plate springs;
plate spring receivers each located between the plate spring and the axle box and including an upper surface which is inclined toward a longitudinal-direction middle portion of the plate spring, the upper surface receiving the plate spring; and
stoppers each arranged in a vicinity of the car longitudinal-direction end portion of the plate spring so as to cover at least a part of an upper surface of the plate spring, the car longitudinal-direction end portion being located above the axle box, wherein
each stopper has an upper surface portion located above a respective plate spring in a spaced relation such that a gap is formed between the upper surface portion and the plate spring allowing for the plate spring to float upward from the plate spring receiver toward the upper surface portion.

2. The railcar bogie according to claim 1 , wherein:
the stoppers are fixed to the respective plate spring receivers; and
upward movements of the plate spring receivers relative to the axle boxes are restricted.

3. The railcar bogie according to claim 2 , wherein:
the axle boxes include respective locking members;
the plate spring receivers include respective locked members, the locked members being locked with the respective locking members; and
the upward movements of the plate spring receivers relative to the axle boxes are restricted.

4. The railcar bogie according to claim 3 , wherein:
each of the locked members extends from a car-longitudinal-direction outer side of the plate spring receiver to the axle box and has a locking hole; and
each of the locking members extends toward the car-longitudinal-direction outer side and penetrates the locking hole.

5. The railcar bogie according to claim 1 , further comprising stopper holding members located at both car-width-direction sides of the plate springs and fixed to the axle boxes, wherein:
the stoppers extend in the car width direction; and
both ends of the stoppers are held by the stopper holding members.

6. A railcar comprising the railcar bogie according to claim 1 .

7. The railcar bogie according to claim 1 , wherein:
the stopper is open on both sides in the car longitudinal direction such that the plate spring is disposed extending through both sides of the stopper in the car longitudinal direction.

8. The railcar bogie according to claim 1 , wherein:
the plate springs are received by the plate spring receivers without being fixed to the plate spring receivers.

Assignees

• Kawasaki Heavy Ind Ltd

Inventors

• Nishimura Takehiro
• Nakao Shunichi

Classifications

• B61F5/305

  incorporating rubber springs · CPC title

• B61F5/52 Primary

  Bogie frames · CPC title

• B61F5/302 Primary

  Leaf springs · CPC title

• B61F5/26 Primary

  Mounting or securing axle-boxes in vehicle or bogie underframes · CPC title