DE2550893A1 - Rail vehicle disc brake - has annular disc secured to hub by bolts in radial slots of hub - Google Patents

Abstract

The disc brake esp. for rail vehicle has an annular double wall brake disc (15, 16) connected to a hub (12) by an annular array of bolts (24). Each bolt has at one end an integral head (23) press-fitted into a bore in the one disc wall (15) and a flat section shank seated in a radial slot of the hub. The other end of the bolt has a head (25) welded to the bolt after press-fitting into a bore (20) in the other disc wall (16). The free end-faces of the bolt heads are flush with the friction faces (17) of the disc.

Description

ZiUsa., I: ienges-atw.to brake disc, iuobeacndere for rail vehicles

"The üirfinduug concerns a ^, usa: ..; engeseti / Le L, ro; .. secnei'je, i ' especially for rail vehicles, with the one on the

Axle shaft attached tfabc as a support body for the ßre ..sriii, and the connection ier two parts is made by axially located bolts with a flattened middle part, ^] * whose middle part i. :: i-litnehi-erochen the hub : it sliding seat is arranged to be radially movable.

I ii .. otand the technique are blue iiabe and ;; re-sring through

Klei.ousitü Drehi.iOK.entschlüsüi., Connected vesen. ltec be '. This is an elaotic construction of the carrier.; e that have, l · the iiii essential through a weakening of the • load-bearing • cross-section of the 'oragar; .. e .. with the help of a :: ial I slits in the carrier. iCii errt.ic: l; t vrird. liier Tehlen JJL;

\ belactung the .rafbUbertra _o epdeu elements; The result is

strong wear and tear, which is favored by the fact that with these uev / egliciien power enduring elements work on steel or cast steel. The OLerflächenver- '■■}' ßUtung the sliding flat avfechs iiinderung of wear [^ '? iet ! -. oton-consuming. Uie securing ^l 3reiusscheibo and '· ">, hub against axial displacement through adapted securing , x' ¹ pieces is also expensive.

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The present invention is therefore based on the object an extremely simple connection between the hub and the brute ; iu find without the disadvantages of the known constructions in purchase to ..uissen. In addition, the expansion of the Brensring in the radial direction as a result of the Ervrärr.iun ^ bite brakes are enabled »without even with prolonged use due to wear and tear, an inadmissibly high clearance in the concentric direction is set, which leads to vibrations and rattling noises.

The solution to the problem is that the fixed and the subsequently aiu bolt to be fastened head of the bolt is mounted with a press fit in the brake ring and between each other facing end faces of the bolt heads and the corresponding side faces of the driver cams tight fit present is.

The bolt heads expediently form in the friction surface lying holes part of the friction surface.

The distance between the inner surfaces of the brake ring, in general in the area of the driver cams, is advantageously greater than their width.

The main advantage of this type of fastening is that that the known sliding block guide is implemented with the simplest means while avoiding a press fit, at the same time this leadership is the transfer of the forces of the brain in concentric Tiichtung takes over and the fuse of the brake ring is guaranteed in the axial direction in the event of failure of one or more fastening bolts. Besides that the special design of this bolt ensures that the bolt does not come out of its own accord Bores can wander out, with no additional securing elements are necessary. This makes one very simple construction of the brake disc and at the same time a very high level of security against automatic loosening of the brake ring of the possessions.

In the drawings, an example embodiment of the invention is shown and that shows

7 0 9 8 2 0/0137 ""

Fi _o ur 1 a side view of a fastening point Fi _o ur 2 a section along the line I - II of FIG

According to the figures, the hat 11 is attached in a known manner in a divided or undivided design to the axle shaft (not shown) of the rail vehicle. This hub 11 carries at least three guide cams 12 in uniform positions, which extend in the radial direction and have a radial slot 13. The one-part brake ring Uf, as is known, consists of two pulp belts 15 and 16, which have pulp friction surface 17 on the front and are connected to a unit on the back by ribs 18. On the inner circumference of the pulp ^ s IA on each brake belt 15 and 16 inwardly ^r 'radially extending lugs 19 are provided, in which Joüeile * a hole 2o is arranged. H & ch Figure 2, the ^ Hitnehiaernocken 12 of the hub 11 has a © slightly smaller width ^r than corresponds to the distance between the inner surfaces 21 at the edge 19 so that the two parts do not touch each other on the surfaces 21 , because the © slaieti braking forces are transmitted via the steel bolts 21 * to the participants 12 of the hub 11.

To connect the brake ring to the hub 11, axially parallel bolts 22 are used, which consist of a fixed head part 23 and a flattened middle part 24, as well as a head 25 to be attached to the bolt. The fixed head 23 and the loose head 25 have such a diameter that they all lie with a press fit in the bore 2o in the approach 19. I3 dee HltsiehBerkockece 12 lies. The mutual sueeketoi & a ßfcirnflöchoa | S "Ä ^ for 'Bolzenkupfe 23 and 25 are old JOctoitz an'-A ^ a © tttöjproob«% · - "the side surfaces 28 of the Mitnehr ^ feocken 12 C3« P! ^' Abgo- ■ - ^ ,, flattened middle part 2if d »j Boliono4,0t vcr ^^^ oioa a short · ' ^{: (i} -piece In a corresponding groove $ 3 loa @ Ä% og £ ee ble In' ^!: \ 7

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this head 25 is introduced and continues there in a round end 29 with a smaller diameter. This end 29 is then connected to the loose head 2. ^ using a weld seam 27. The length of the bolt 22 is chosen so that the bolt heads 23 and 25 when in the friction surface 1? lying holes 2o form part of the pulp friction surface.

To assemble this brake disc, the 11 attached in a known manner on the axle shaft. Subsequently a porridge ring is pushed onto the property in such a way that the | 19 lie next to the Mitnehiaernocken 12 and then the lil ^ p ^ rotated so that the Mitnehernocken 12 between - ^ z-Am ; di © jtosätze 19 slide on the brake belts 15 and 16 and the | Schlitz, ii3 etisra «old the bores 2o in the approaches l ^ i; The bolt 22 is then inserted from one side into the hole 2o until the fixed head 23 with ä is pressed into the hole 2o in such a way that the central part Zk dos bolt 22 old sliding position is in -13 Now the loose head 25 is inserted into the still> P ^ f © a® hole 2o and onto the end 29 of the bolt 22 ^ e- , ₉ until Pr @ s © itz of the head 25 is reached. In this case, cords are such that the loose head 25 is pressed in so far that the facing end faces 26 of the bolts Wöpf © old defined force are pressed against the corresponding side faces 2G of the entrainment beer cam 12. Then weld seam 2? attached and the part of the bolt-EOüoit protruding over the I © ibflache 17 from £ QOChliffen _e to the bolt head and friction surface. The brake disc is now ready for use and only needs to be removed after the brake rings have worn out.

The number of dead grains is uncritical and can be adapted to the requirements of the load situation. Ea is also oteo further® nt Genealogie@J.ich _e to harden the flattened areas of the central part Zk deo Bolzene 22 or the corresponding surfaces of the slot 13 or to provide a hard surface in order to reduce wear at these points. Connections between the loose head and the end of the bolt can also be provided v @? De &»&; B · a screw connection,

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Claims (2)

^ 550803 Claims Composite brake disc, especially for rail vehicles, one of which is attached to the axle shaft serves as a support body for the brake ring and the connection of the two parts through axially parallel edging flattened middle part takes place, the middle part iu Driving cam of the. Hub with sliding position can be moved radially is arranged, characterized in that the fixed (23); : and the loose head (25. of the bolt (22) old. Press fit in Breasring (H) is and between the facing end faces (26) of the bolt head (23,25) and the corresponding side surfaces (28) the Mitnehniernocken (12) featsitz is present. 2.) Composite brake disc according to claim 1, dacUivoh t, ekennaeichnst, that the jjolzenköpfe (23.25) in the Friction surface (17) lying holes (2o) part of the Form friction surface / ■ 3) Composed Brews disk according to claim 1 or 2, characterized in that the distance between the inner surfaces (21) of the brake ring (H) in the area of the Kiitnehüiernoctten (12) is larger than its width ^ i) Züß0BSHi © ngeosed brake disc according to one of claims 1-3 » characterized in that the surfaces of the slot (13) and / od @ r the adjacent surfaces of the flattened Mitt®lt0ilo to) of the bolt (22) hardened or with a hard support are provided. . 709820/0137