FR2498144A1 - BLADE SPRING SUSPENSION BOGIE FOR RAILWAY VEHICLE - Google Patents

Abstract

THE INVENTION CONCERNS A BOGIE FOR A RAILWAY VEHICLE CONSISTING OF A MONOBLOC CHASSIS MADE OF A DANCING CROSSMOUNT AND 2-DOOR SIDE RAILS, EACH IN ITS CENTER, BY BLADE SPRINGS 17, THE ENDS OF WHICH ARE FIXED TO THE LANDING BOXES 3 OF THE AXLES, THE ENDS OF THE SAID SPINDLE BEAMS BEING CONNECTED TO THE SAID AXLE BOXES BY CONNECTORS 21 AND SHOCK ABSORBERS 11, THE ONE AND THE OTHER MOUNTS WITH PIVOT AT THEIR ENDS, SO AS TO ALLOW THE EQUALIZATION OF THE LOADS EXERCISED ON THE CURVED BOGIE AND VARIATION OF AXLE CENTER CENTER TO FACILITATE CURVED ENTRY.

Description

The present invention relates to road vehicles

  of iron and in particular the bogies of these vehicles.

  The existing patents describe various types of bogie: One of them describes a bogie comprising a spacer placed a dancing crossbeam between side rails and resting on elastic suspensions mounted in beam recesses, the bodies carrying the vehicle body and absorbing the weight being mounted on the dancing cross member above the

elastic suspension.

  Another patent describes a bogie comprising balancers

  ciers joined longitudinally by a loosely suspended wire rope, and joined transversely by elastic bars and having leaf springs attached

  to pendulums by compensating bars.

  One of the previous achievements includes a bogie

  provided with lateral links which can oscillate

  versally, pivotally joined to a dancing crosspiece and

  to a stepped boot, so that the extremes

  half of the rods and the dancing cross of

  move relative to each other in two di-

  rections. Another patent describes a bogie, each axle of which is

  coupled to a dancing crosspiece by connecting rods

  thrust mounted on a pivot, so that each of them

  -Can oscillate vertically and laterally, and com-

  carrying leaf springs dynamically coupled to

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  the dancing cross and aux. thrust rods by

  an assembly of a metal cable and stops.

  Another of these prior patents describes an assembly comprising an axle chassis pivotally mounted for ball joints at a dancing cross resting on

springs worn by the chassis.

  None of these prior patents show the spitting

  absolutely new features of the present invention.

  The main object of the present invention is to produce a bogie of a railway vehicle, the better handling of which results in a reduction in the

  gallop, yaw and roll movements, and

  improvement of the general registration in the track.

  The invention also aims to achieve an o-

  gane equalisateuw of óhgs5 refreshing the rerical ebChges between the axles of a bogie, goal achieved

  by means of a set of leaf springs which act

  are like a balnier, said the chazrge s.

  the wheels whatever the displacements of the

Q pension.

  In accordance with the invention, a bogie with a shaped chassis

  of H, for railway vehicle, has wno6 tra-

  dancing verse to which are fixed beams! a-

  bearings, rigidly joined bearings to the axles, coupling rods and vertical shock absorbers pivoting the bearings and the side rails,

  and leaf spring assemblies. The bogie is sensed

2 49814 4

  so relieved by the vertical load transfer

  vehicle wedge at the side bearings instead of the central bowl. The central bowl is replaced

  by a central clamp on which the bogie pivots

  tera. The articulated links allowing a varia-

  the wheelbase between the axles when the bo-

  gie of inscribed in a curve. The leaf springs, being the same length and the same shape, dispense with heavy and complicated leaf springs because the load exerted on the axle is distributed between the spring and the point of contact between the spring and the beam lateral. Leaf springs have nonlinear elastic characteristics due to

  their constant cross section over the entire length

  spring. The shock absorbers assist the seedlings

  bles with leaf springs by absorbing part of the

dynamic shocks.

  The nature, principle and usefulness of this information

  vention will appear more clearly on reading

  the description of a preferred, non-limiting example of

  realization and claims, set out below,

  with reference to the accompanying drawings in which: - Fig.1 is a side view of a vehicle bogie

  railway according to the invention and some of which

  some parts have been updated; - Fig.2 is a partial top view of the bogie of Fig.1 and - Fig.3 is an exploded perspective view of the bogie

of Figs. 1 and 2.

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  The H-shaped rigid chassis bogie according to the invention, shown in FIGS. 1, 2 and 3,

  includes a dancing crosspiece 1 comprising lanyards

  rons 2 of trapezoidal shape, in one piece with it, and having inclined parts 2 '. Bowls 8 with bearings 3 are fixed to the axles 4. The central part 5 of the dancing cross member 1 is lower

  as its ends. A central basket 6, comprising

  both a pin 6 'and a kingpin 7, trans-

  putting the horizontal forces applied to the wagon body to the bogie, are placed on the upper face of the central part 5. 'A lateral bearing 8, placed on each lateral spar in the immediate vicinity of each end of the dancing cross member 1, transmits the vertical forces of the wagon body to the bogie which carries a toothed sector 9 allowing the rotation of

  the body on the bogie, rollers 10, fixed to the box

  then meshes with the toothed sector 9. The lateral bearings 8 are arranged essentially halfway between the ends of each lateral spar 2. Inclined vertical dampers 11, placed outside the bogie, are fixed to gussets 12 side rails, and to side mounts 13 of the landing boots, by bolts 14. The vertical shock absorbers

  11, joining each boot at paliezs3 to the side members la-

  3, serve to absorb vertical forces,

  together with sets of leaf springs 15 gou-

  looted from the leveling boots 3 and the upper part of which bears against the underside of the spar

side 2 corresponding.

  The leaf springs 15 are joined by a bolt 16 '

  whose head is placed inside the spar la-

téral 2 correspondent.

  All the blades 17 of each set of leaf springs 15 have the same shape and the same length and are drilled at their ends with holes 18 aligned with one another

on the others.

  Each tiered boot has a lower stirrup 19 from which projects a vertical guide pin 20

  passing through said holes 18 of the spring blades.

  Articulated links 21, the ends of which are fixed to pins 22 carried, respectively, by fastening lugs 23 of the bearing boxes and 24 of the side rails and of the gussets 12, are inserted in each free space situated above the parts

  inclined 2 'of each lateral spar 2, and contribute

  thus drink to reduce the size and weight of the bogie. These rods 21, establish an articulated junction - between the bearing boxes 3 and the side beams 2, facilitate the variations of the center distance caused by the normal transfer of loads when the bogie

takes a curve.

  The advantage offered by the bogie according to the invention is that it uses sets of leaf springs of which each leaf is of identical shape and length. The spring

  with unloaded blades is worn in the center of the face

  of the corresponding side member. As the load increases, the leaf spring deflects

  and comes to carry on the underside of the spar la-

  teral we zrapprochant axles. In other words, the effective length of the spring decreases as the load exerts on the increasing suspension. These blades of identical shape and dimensions differ from those of leaf springs in common use on railway or motor vehicles in which the blades must have a different shape and dimensions. This. design keeps a at a

  / fs.ible level the constraints on the resources

  spells and do without heavy leaf springs and - complicated in use in previously known devices, because the chearg on leesieu, est.épartie ent: re the spring and the contact area between the spring and the length-on lateral. In addition, the lnames spring plays

  the rble to a! equalizing balance distributing -e char-

  age on the axles whatever the displacement of the v: suspe-nsion Another earacirstiaue aV & nEgeu. e of the device

  according to the invention is zson aptitu-.e director allows-

  so much for the bogie to fit into snc curves. cons

  brutal tact or wear between the flanges of the wheels and the rails. Normal weight transfer from the interior to

  the wheels are located outside the curve crosses

  the center distance of the side foe "emenc 4hargéo When 'the vehicle takes the curve, the óh.rge on the outer wheels increases and, because of the articulated links

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  joining the side rails and the bearing boxes mounted on the axles, the distance between the axes

  axles also increases from the heaviest side

  loaded. As a result, the axles are placed along the radii of the curve in a somewhat "guiding" position. The dancing bogie cross member is significantly relieved due to the transfer of the vertical load of the wagon from the central bowl to the lateral bearings. The central bowl is replaced by a central bowl transmitting only

horizontal forces.

  the trapezoidal shape of the side rails, the provision

  sition of the articulated rods above the inclined parts of the lateral beams, the lowering of the central part of the dancing cross member carrying the central brace, the external arrangement of the shock absorbers and the new design of the light leaf springs working as load equalizing balancers , make this rigid H-frame bogie a more compact, more economical and rolling assembly

softer than classic bogies.

  The use of an H-frame makes it possible to obtain a bogie with stabilized undercarriage, that is to say with parallel and straight axles, unlike a three-part chassis in which the dancing cross member and

  the side rails are not rigidly joined.

  A three-part chassis leaves one of the side members

  side come to place in front of the other and contribute

  drunk to accentuate the instability of the bogie in its movement

galloping.

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  The invention being susceptible of numerous variants and modifications without leaving its own domain, it

  it is understood that the above description has a value

  their illustrative and not limiting.

Claims (11)

  1. Bogie for a railway vehicle, characterized in that it comprises, in combination: a dancing cross-member (1) at each end of which is fixed a lateral spar which is integral with it; boots with axle bearings (3); a vertically compressible assembly of leaf springs (15) fixed to each of said lateral side rails (2) and of said respective bearing boxes (3); coupling rods (21) and shock absorbers (11) hingedly joining said lateral beams (2) and said bearing boxes (3); lateral bearings (8) for the vehicle body, mounted on said lateral beams (2) in order to absorb the forces   vertical exerted by an associated vehicle body   ciée, suitable to be mounted on said bogie; and a central clamp (6) mounted on the dancing crossmember (1) for transferring the horizontal forces exerted by said associated vehicle body to the bogie.   2. Bogie for railway vehicle according to the Reven-   dication 1, characterized in that the central part   (5) of the dancing crosspiece (1) is located at a level   monk calf raised as the ends of said tra- pours. 2498 1 44   3. Bogie for railway vehicle according to Reven-   dication 1 characterized in that each bearing la-   téral (8) comprises a toothed sector (9) mounted on the lateral spar (2) corresponding to cooperate with sets of rollers (10) carried laterally by the vehicle body.   4. Bogie for railway vehicle according to the Reven-   dication I, characterized in that each lateral spar (2) has -a trapezoidal shape comprising inelinae-3 parts (2 ') at its ends at which   said rods (21) and said dampers are fixed weavers (11).   , Bogie for railroad vehicle according to Claim I c ce'8téisé eo. as said beams (2) are f.'me trapésodEalc ccmportant d iotes   inel; Inées (2 :) to leinre trésit4s, leodits ortis-   vertical seurLi (11) enI & t pivotally mounted atudits side rails (2> from-the area desdir.es parts inciré6es- (2e), and the shock absorbers (41) being attached to said boots _to re.lier (3) and as'tendant outside, those Oio   6, Bogie for rail vehicle according to the Reven-   dication 1, characterized in that the elastic suspensions (15) constituted by spring blades (17) curved in a convex shape, take contact with each other   their sonIet (16) with the latS-ral spar (2) corresponds   laying at its junction point with the dancing tra-erse (1) and its joints operatively, by their opposite ends, to the axle boxes (3) of the block bogie correspondent. 1 1   7. Bogie for railway vehicle according to the Reven-   dication 1, characterized in that these resistor blades   fate (17) of said elastic suspensions (15) are of equal length.   8. Bogie for railway vehicle according to the Reven-   dication 1, characterized in that the longitudinal members la-   teral (2) have a trapezoidal shape having inclined parts (2 ') at their ends, said   rods (21) being arranged in the area of your inclined parts (2 ').   9. Bogie for railway vehicle according to Reven-   dication 1, characterized in that the boxes with pa-   liers (3) comprise a lower bracket (19) to which a guide pin (20) is fixed, and in that the spring leaves (17) constituting the elastic suspensions (15) are pierced, at each end, with   holes (18) aligned with each other and that   pours the corresponding guide pin (20).   10. Bogie for railway vehicle according to Reven-   dication 1, characterized in that each basket   central (6) comprises a pin (6) and a sleeve   working town (7) serving as a pivot for the bogie and being able to engage, in the usual way, with the vehicle body.   11. Railway vehicle bogie according to Claim-   cation 1, characterized in that it comprises: two es-   seats (4), with wheels, spaced from each other and carrying, at each end, a bearing boot (3) 24 9 8 1 4 4   axle load equalizing devices   taking leaf springs (15) on each side of the bogie, extending between the bearing boots (3) on each of said sides and supported at these points at a level lower than that of the axles; a one-piece frame constituted by a dancing cross-member (1) at each end of which is fixed a lateral spar (2) carried by the corresponding group of leaf springs (15), the ends of said lateral spars (2) reaching the boxes respective bearings (3) of the corresponding side of the bogie; and regulating organs of the displacements occurring   between the bearing boots (3) and the side members la- respeective tera (2)   12. Railway vehicle bogie according to Claim-   cation 11, characterized in that said organs re-   displacement regulators comprise rods (21) pivotally mounted, at their opposite ends,   at the corresponding ends of the side rails   rails (2) and to bearing boxes (3) on predetermined axes, and shock absorbers (11) mounted at   pivot, par. one end, to the lateral spar cor-   corresponding, on an axis parallel to that of the biel-   associated but distant from it, and, by the   be end, on a lower axis and parallel to   the other pivot axis of said connecting rod ciée (21).   13. Bogie for railway vehicle according to   Claim 11, characterized in that the section   transverse of said leaf springs (17) is   constant over the entire length of the blades.