Steering bogie for railcar

Patent metadata

Field	Value
Publication number	US-10131368-B2
Application number	US-201515537690-A
Country	US
Kind code	B2
Filing date	Dec 9, 2015
Priority date	Dec 17, 2014
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

A steering bogie for a railcar includes: a bogie frame supporting a carbody of the railcar; a wheelset including an axle and wheels, the axle extending in a car width direction, the wheels being provided at both respective sides of the axle; and a steering device that presses a pressing target member to steer the wheelset with respect to the bogie frame, the pressing target member being constituted by the wheelset or a member configured to be displaced integrally with the wheelset in a steering direction, the steering device including at least one steering unit, the at least one steering unit including a pressing member that separably contacts the pressing target member to press the pressing target member, and a power mechanism causes the pressing member to contact and separate from the pressing target member.

First claim

The invention claimed is:

1. A steering bogie for a railcar,
the steering bogie comprising:
a bogie frame supporting a carbody of the railcar;
a wheelset including an axle and wheels, the axle extending in a car width direction, the wheels being provided at both respective sides of the axle; and
a steering device that presses the wheel to steer the wheelset with respect to the bogie frame,
the steering device including at least one steering unit,
the at least one steering unit including
a pressing member that separably contacts the wheel to press the wheel, and
a power mechanism that causes the pressing member to contact and separate from the wheel, wherein

the steering device steers the wheelset by the pressing member pressing the wheel by power of the power mechanism.

2. The steering bogie according to claim 1 , wherein the steering device steers the wheelset by the pressing member pressing a wheel tread of the wheel by the power of the power mechanism.

3. The steering bogie according to claim 1 , wherein the pressing member is a roller that is rotatable together with the wheel when the pressing member contacts the wheel.

4. The steering bogie according to claim 1 , wherein the pressing member is formed by a low friction material.

5. The steering bogie according to claim 1 , wherein:
the at least one steering unit comprises a plurality of steering units;
the plurality of steering units include
a first steering unit that separably presses a first portion of the pressing target member, the first portion being located at one side in the car width direction and
a second steering unit that separably presses a second portion of the pressing target member, the second portion being located at the other side in the car width direction; and

the first steering unit and the second steering unit press the pressing target member in directions different from each other to steer the wheelset.

6. A steering bogie for a railcar, the steering bogie comprising:
a bogie frame supporting a carbody of the railcar;
a wheelset including an axle and wheels, the axle extending in a car width direction, the wheels being provided at both respective sides of the axle; and
a steering device that presses a pressing target member to steer the wheelset with respect to the bogie frame, the pressing target member being constituted by the wheelset or a member configured to be displaced integrally with the wheelset in a steering direction,
the steering device including at least one steering unit,
the at least one steering unit including
a pressing member that separably contacts the pressing target member to press the pressing target member, and
an actuator that causes the pressing member to contact and separate from the pressing target member.

7. The steering bogie according to claim 1 , wherein the power mechanism is a link mechanism that operates in accordance with turning of the bogie frame relative to the carbody about a vertical axis.

8. The steering bogie according to claim 6 , wherein:
the pressing target member is the wheel of the wheelset; and
the steering device steers the wheelset by the pressing member pressing the wheel by power of the power mechanism.

9. The steering bogie according to claim 8 , wherein the steering device steers the wheelset by the pressing member pressing a wheel tread of the wheel by the power of the power mechanism.

10. The steering bogie according to claim 8 , wherein the pressing member is a roller that is rotatable together with the wheel when the pressing member contacts the wheel.

11. The steering bogie according to claim 8 , wherein the pressing member is formed by a low friction material.

12. The steering bogie according to claim 6 , wherein:
the at least one steering unit comprises a plurality of steering units;
the plurality of steering units include
a first steering unit that separably presses a first portion of the pressing target member, the first portion being located at one side in the car width direction and
a second steering unit that separably presses a second portion of the pressing target member, the second portion being located at the other side in the car width direction; and

the first steering unit and the second steering unit press the pressing target member in directions different from each other to steer the wheelset.

13. The steering bogie according to claim 6 , wherein the actuator includes a hydraulic cylinder that causes the pressing member to contact and separate from the pressing target member.

Assignees

• Kawasaki Heavy Ind Ltd

Inventors

• Nakao Shunichi
• Kusunoki Takeyoshi

Classifications

• B61F5/386 Primary

  fluid actuated · CPC title

• B61F3/08

  without driven axles or wheels · CPC title

• B61F5/38 Primary

  Arrangements or devices for adjusting or allowing self- adjustment of wheel axles or bogies when rounding curves, e.g. sliding axles, swinging axles · CPC title

• B61F5/46 Primary

  Adjustment controlled by a sliding axle under the same vehicle underframe · CPC title