Chassis for a rail vehicle

Patent metadata

Field	Value
Publication number	US-2017166224-A1
Application number	US-201515327086-A
Country	US
Kind code	A1
Filing date	Jul 2, 2015
Priority date	Jul 18, 2014
Publication date	Jun 15, 2017
Grant date	—

Abstract

A chassis for a rail vehicle includes a chassis frame supported on at least first and second wheelsets and one A-frame linkage per wheelset on both sides of the chassis for horizontal axle guidance of the wheelset. Each A-frame linkage is connected in an articulated manner to one of two axle bearings of a wheelset by a wheelset-side bearing and to the chassis frame by two frame-side bearings. At least one of the bearings per A-frame linkage has a hydraulic bushing with variable longitudinal rigidity. The hydraulic bushing has at least one fluid chamber fillable with hydraulic fluid so that in the fluid chamber a hydraulic pressure can form for adjusting longitudinal rigidity. An acceleration sensor per axle bearing measures wheelset acceleration and an adjustment device adjusts hydraulic pressure in at least one of the fluid chambers depending on the measured wheelset acceleration.

First claim

1 - 12 . (canceled)

13 . A chassis for a rail vehicle, the chassis comprising:
a chassis frame having two sides; at least one first wheelset and at least one second wheelset supporting said chassis frame, each of said wheelsets having a respective axle and two respective axle bearings; A-frame linkages each disposed on a respective one of said sides of said chassis frame for horizontal guidance of said axle of a respective one of said wheelsets; wheelset-side bearings each forming an articulated connection of a respective one of said A-frame linkages to a respective one of said two axle bearings, and two frame-side bearings each forming an articulated connection of a respective one of said A-frame linkages to said chassis frame; at least one of said bearings connected to each respective A-frame linkage having a hydraulic bushing with a variable stiffness, said hydraulic bushing having at least one fluid chamber to be filled with a hydraulic fluid, permitting a hydraulic pressure to form in said at least one fluid chamber for adjusting a longitudinal stiffness; acceleration sensors each being associated with a respective one of said axle bearings for measuring an acceleration of a respective wheelset; and an adjustment device for adjusting the hydraulic pressure in at least one of said fluid chambers as a function of the measured wheelset acceleration.

14 . The chassis according to claim 13 , wherein said adjustment device is configured to actively impose a turning moment on one of said wheelsets associated with said at least one fluid chamber by adjusting the hydraulic pressure in said at least one fluid chamber.

15 . The chassis according to claim 13 , wherein said at least one bearing having said at least one fluid chamber is said wheelset-side bearing.

16 . The chassis according to claim 13 , wherein said adjustment device has a pressure reservoir to be connected to said at least one fluid chamber.

17 . The chassis according to claim 13 , wherein said adjustment device has a pressure generation device to be connected to said at least one fluid chamber.

18 . The chassis according to claim 13 , wherein:
said at least one fluid chamber of said hydraulic bushing includes a fluid chamber disposed outwardly in a longitudinal direction and a fluid chamber disposed inwardly in the longitudinal direction; said outwardly and said inwardly disposed fluid chambers lie opposite one other and can be filled with hydraulic fluid; fluid channels are each connected to a respective one of said fluid chambers for an inward or outward flow of hydraulic fluid into or out of said respective fluid chamber; and said adjustment device is hydraulically coupled to said fluid channels and is configured to adjust an inward or outward flow of hydraulic fluid to permit the hydraulic pressure in said fluid chambers to be adjusted by using outflows or inflows of hydraulic fluid.

19 . The chassis according to claim 18 , wherein:
said hydraulic bushing is one of a plurality of hydraulic bushings disposed on said sides of said chassis frame; said fluid channels include external fluid channels interconnecting said hydraulic bushings disposed on the same side of said chassis frame; said fluid chambers include a fluid chamber of said first wheelset lying outside and a fluid chamber of said second wheelset lying inside being hydraulically coupled to each other, and a fluid chamber of said first wheelset lying inside and a fluid chamber of said second wheelset lying outside being hydraulically coupled to each other; and said adjustment device is hydraulically coupled to said external fluid channels.

20 . The chassis according to claim 19 , wherein:
said hydraulic bushings each have a respective internal fluid channel through which said fluid chamber lying outside and said fluid chamber lying inside on the same hydraulic bushing are hydraulically coupled to each other; and said adjustment device includes on/off valves each being associated with a respective one of said internal fluid channels for adjusting a flow of hydraulic fluid through said internal fluid channel.

21 . The chassis according to claim 13 , which further comprises a pressure sensor for measuring a hydraulic pressure in one of said fluid chambers.

22 . A method for operating a chassis for a rail vehicle, the method comprising the following steps:
providing a chassis including:
a chassis frame having two sides;
at least one first wheelset and at least one second wheelset supporting the chassis frame, each of the wheelsets having a respective axle and two respective axle bearings;
A-frame linkages each disposed on a respective one of the sides of the chassis frame for horizontal guidance of the axle of a respective one of the wheelsets;
wheelset-side bearings each forming an articulated connection of a respective one of the A-frame linkages to a respective one of the two axle bearings, and two frame-side bearings each forming an articulated connection of a respective one of the A-frame linkages to the chassis frame;
at least one of the bearings connected to each respective A-frame linkage having a hydraulic bushing with a variable stiffness, the hydraulic bushing having at least one fluid chamber to be filled with a hydraulic fluid, permitting a hydraulic pressure to form in the at least one fluid chamber for adjusting a longitudinal stiffness;
acceleration sensors each being associated with a respective one of the axle bearings for measuring an acceleration of a respective wheelset; and
an adjustment device for adjusting the hydraulic pressure in at least one of the fluid chambers as a function of the measured wheelset acceleration;
measuring a wheelset acceleration for each wheelset by using the acceleration sensors; and adjusting the hydraulic pressure in at least one of the fluid chambers as a function of the measured wheelset acceleration.

23 . A rail vehicle, comprising a chassis according to claim 13 .

24 . A non-transitory computer-readable medium with instructions stored thereon, that when executed by a processor, perform the steps of claim 22 .

Assignees

• Siemens Ag

Inventors

• Meyer Heiko
• Maerkl Hans Juergen

Classifications

• B61K9/00

  Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles · CPC title

• B61F5/386 Primary

  fluid actuated · CPC title

• B61F5/52

  Bogie frames · CPC title

• B61F3/08

  without driven axles or wheels · CPC title

• B61F5/325

  The guiding device including swinging arms or the like to ensure the parallelism of the axles · CPC title