Railcar bogie and railcar including same

Patent metadata

Field	Value
Publication number	US-9527516-B2
Application number	US-201314388128-A
Country	US
Kind code	B2
Filing date	Jan 10, 2013
Priority date	Apr 6, 2012
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

A railcar bogie includes: a cross beam to support a carbody of a railcar; wheels at both railcar width direction sides of the bogie lined up longitudinally at each side; a pair of front and rear axles respectively at a front side and rear side in the railcar longitudinal direction to sandwich the cross beam each of the axles connect wheels located at the left side and right side of the railcar; bearings at both railcar width direction sides of each axle to rotatably support the axle; axle box portions coupled to the cross beam via elastic members to store the bearing; and plate spring portions to respectively support both railcar width direction end portions of the cross beam and both railcar longitudinal direction end portions of the plate spring portions, supported by the axle box portions. The axle box portions include a surface that supports the plate spring portion.

First claim

The invention claimed is:

1. A railcar bogie comprising:
a cross beam configured to support a carbody of a railcar, the cross beam extending in a rail car width direction;
wheels arranged at both railcar width direction sides of the bogie to be lined up in a railcar longitudinal direction at each of the sides;
a pair of front and rear axles between which the cross beam is located and which are respectively arranged at a front side and rear side in the railcar longitudinal direction so as to extend in the railcar width direction, each of the axles connecting the wheels located at a left side and right side in the railcar width direction;
bearings arranged at both railcar width direction sides of each of the axles and configured to rotatably support the axle;
axle boxes coupled to the cross beam via elastic members such that the axle boxes are movable relative to the cross beam, and each axle box being configured to store the bearing; and
plate springs extending in the railcar longitudinal direction so as to respectively support both railcar width direction end portions of the cross beam, both railcar longitudinal direction end portions of each of the plate springs being respectively supported by the axle boxes, wherein
each of the axle boxes includes a supporting surface that supports the plate spring such that the plate spring is relatively movable, and the supporting surface is inclined toward a longitudinal direction middle portion of the plate springs.

2. The railcar bogie according to claim 1 , further comprising gap bodies each configured to couple the supporting surface to the plate spring and be elastically deformable.

3. The railcar bogie according to claim 1 , wherein the plate spring is slidable with respect to the supporting surface.

4. The railcar bogie according to claim 1 , further comprising position adjusting portions each configured to cause the supporting surface to move in the railcar longitudinal direction.

5. The railcar bogie according to claim 1 , further comprising:
coupling members extending in the railcar longitudinal direction and each including one end connected to the axle box; and
driving portions to each of which the other ends of the coupling members are connected, the driving portions each being configured to cause the coupling member to be displaced in the railcar longitudinal direction based on prestored railway track information to change a wheel base between the axles.

6. The railcar bogie according to claim 5 , further comprising:
a storage portion configured to store track curvature information of a traveling point of the railcar; and
a position detecting portion configured to detect a current position of the railcar, wherein
each of the driving portions changes a displacement amount of the coupling member based on the curvature information and the current position.

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

8. The railcar bogie according to claim 1 , wherein the supporting surface is located above the bearing stored in the axle box.

9. The railcar bogie according to claim 1 , wherein the elastic members are disposed between the axle boxes and the cross beam in the railcar longitudinal direction such that the axle boxes are movable relative to the cross beam.

Assignees

• Kawasaki Heavy Ind Ltd

Inventors

• Nishimura Takehiro
• Nakao Shunichi

Classifications

• B61F5/32

  Guides, e.g. plates, for axle-boxes · CPC title

• B61F5/302

  Leaf springs · CPC title

• B61F5/30

  Axle-boxes mounted for movement under spring control in vehicle or bogie underframes {(B61F5/36 takes precedence over B61F5/305 - B61F5/34)} · CPC title

• B61F5/52 Primary

  Bogie frames · CPC title

• B61F5/44

  Adjustment controlled by movements of vehicle body · CPC title