This application is based upon and claims the benefit of priority of the prior French Patent Application No. 16 54158, filed on May 10, 2016, the entire contents of which are incorporated herein by reference.
The present invention relates to a bearing for mounting an anti-roll bar on a bogie frame, the anti-roll bar extending along a transverse axis of the bogie and being moveable in rotation relatively to the frame around the axis, the bearing including a first half-shell intended to be mechanically secured to the frame, and a second half-shell adapted so as to be attached on the first half-shell by means of an attachment system, the first half-shell and the second half-shell then forming a housing crossing through along the axis and adapted for receiving the anti-roll bar.
The invention also relates to a bogie integrating at least two bearings as described above.
The use of at least one anti-roll bar is known in a railway vehicle bogie, extending transversely for limiting the roll of the railway vehicle at the relevant bogie level.
The anti-roll bar is generally attached to the frame of the bogie by means of two bearings. Each of the bearings comprises a first machined portion in the frame, therefore made in the material with the frame, and a second portion intended to be attached on the first portion, the anti-roll bar being confined between the first portion and the second portion.
The first portion forms a half-shell which is rather difficult to machine, and for which the manufacturing therefore takes a certain time. The result of this is a relatively high manufacturing cost of each mounting bearing, and therefore of the actual bogie.
An object of the invention is therefore to overcome totally or partly the aforementioned drawback, i.e. reduce the costs relating to the mounting of the anti-roll bar on the bogie frame.
For this purpose, the object of the invention is a bearing for mounting of the type described above, wherein the first half-shell is distinct from the frame and adapted so as to be attached on the frame by means of a second attachment system.
According to particular embodiments, the bearing comprises one or several of the following features, taken according to all the technically possible combinations:
The object of the invention is also a bogie comprising:
According to a particular embodiment, the frame includes at least four protrusions, each of the first half-shells being attached on two of the protrusions.
The invention will be better understood upon reading the description which follows, exclusively given as example and made with reference to the appended drawings, wherein:
With reference to
The bogie 1 comprises a frame 5 partly illustrated in
The frame 5 includes at least four protrusions 17, two of which are visible in
The protrusions 17 illustrated in
Each protrusion 17 includes a face 19 adapted for cooperating with one of the bearings 10A, 10B.
Both protrusions 17 not shown in
The anti-roll bar 15 extends along an axis T substantially transverse relatively to the bogie 1. The anti-roll bar 15 is mobile in rotation relatively to the frame 5 around the axis T because of the roll. In the example, the anti-roll bar 15 is connected to arms 21 at both of its transverse ends.
The bearings 10A, 10B are advantageously analogue with each other, also only the bearing 10A, better visible in
The bearing 10A forms a housing 23 crossing through along the axis T and adapted for receiving the anti-roll bar 15. The bearing 10A comprises a first half-shell 25 adapted so as to be attached on the frame 5, a second half-shell 27 adapted so as to be attached on the first half-shell. The bearing 10A also comprises a first attachment system 29A for attaching the second half-shell 27 on the first half-shell 25, and a second attachment system 29B for attaching the first half-shell on the frame 5.
The first attachment system 29A and the second attachment system 29B advantageously coincide, and are formed with attachment screws 29.
The first half-shell 25 and the second half-shell 27 are advantageously analogue with each other and symmetrically positioned relatively to a middle plane P of the bearing 10A.
The middle plane P is for example parallel to the axis T and to the faces 19 of the protrusions 17. Advantageously, the middle plane P contains the axis T.
The attachment screws 29 are for example four in number. The attachment screws 29 cross the second half-shell 27, and then the first half-shell 25 and are screwed into the protrusions 17 of the frame 5.
Only the first half-shell 25 will be described in detail hereafter.
The first half-shell 25 comprises a central portion 31 forming a hemicylindrical cradle, and two attachment tabs 33, 35 located on either side of the central portion along a direction D substantially perpendicular to the axis T.
The direction D is for example parallel to the middle plane P.
Each attachment tab 33, 35 includes two pierced holes 37 adapted for receiving the attachment screws 29.
Both attachment tabs 33, 35 extend in the extension of each other along the direction D.
The attachment tabs 33, 35 of the first half-shell 25 respectively include two supporting faces 39, 41 respectively pressing on the faces 19 of the protrusions 17.
The supporting faces 39, 41 are substantially parallel to the middle plane P.
The pierced holes 37 are for example made perpendicularly to the middle plane P.
The mounting of the anti-roll bar 15 on the frame 5 of the bogie 1 will now be described.
The four protrusions 17 are machined beforehand in the frame 5.
Next, the first half-shells 25 of the bearings 10A, 10B are respectively positioned on the protrusions 17. The supporting faces 19, 41 of the attachment tabs 33, 35 are in contact with the faces 19 of the protrusions 17. The central portion 31 of each first half-shell 25 is directed towards the frame 5.
The anti-roll bar 5 is then positioned in the cradles formed by the central portions 31 of the first half-shells 25 of each of the bearings 10A, 10B.
Next, the second half-shells 27 are positioned on the first half-shells 25 as illustrated in
Finally, the attachment screws 29 are placed in the pierced holes 37 aligned with the attachment tabs 33, 35 of the first half-shell 25 and of the second half-shell 27, and are screwed into the protrusions 17.
The anti-roll bar 15 is then concealed in the housings 23 of the bearings 10A, 10B.
By means of the features described above, the cost of the bogie 1 is reduced. Indeed, the protrusions 17 are easy to machine, and the first half-shell 25 and the second half-shell 27 of each bearing 10A, 10B are simple to make.
Unlike the state of the art, the bearings 10A, 10B according to the invention do not comprise any machined curved portion in the frame 5 of the bogie 1.
Further, the optional feature according to which the second half-shell 27 is analogue with the first half-shell 25 gives the possibility of only producing a single type of half-shell for making the bearings 10A, 10B.
Further, the first attachment system 29A and the second attachment system 29B coincide, the attachment of the first half-shell 25 and of the second half-shell 27 is made jointly.
Number | Date | Country | Kind |
---|---|---|---|
16 54158 | May 2016 | FR | national |
Number | Date | Country |
---|---|---|
0918008 | May 1999 | EP |
20110010899 | Feb 2011 | KR |
20110069210 | Jun 2011 | KR |
10-2011-0010899 | Aug 2011 | KR |
2004091992 | Oct 2004 | WO |
2014177417 | Nov 2014 | WO |
2015166618 | Nov 2015 | WO |
Entry |
---|
French Search Report dated Jan. 18, 2017, issued in corresponding French Application No. 1654158. |
Number | Date | Country | |
---|---|---|---|
20170334466 A1 | Nov 2017 | US |