FR2555941A3 - HIGH RESISTANCE CALIPER FOR ATTACHING A DISC TO A WHEEL RIM - Google Patents

Abstract

HIGH RESISTANCE CALIPER FOR FIXING A DISC TO A WHEEL RIM. THIS CALIPER IS MADE FROM A CUT SHEET BLANKET AND IT HAS A RECTANGULAR CENTRAL INSIDE PART 11 FOLDED IN OMEGA AND END PARTS 12 FOLDED TO BE APPLIED TO A RIM 16, THE LIMITS OF THE INTERNAL PART 11 MATCHING WITH THE LIMITS OF THE END PARTS 12 BY THE CURVATIONS WHICH ARE MADE BY REMOVAL OF MATERIAL AFTER SHAPING.

Description

The invention relates to a stirrup which, used with other stirrups of the

  same type, binds to a vehicle wheel rim to fix and hold in place a disc of

central support.

  This stirrup is of U-shaped or omega cross-section type; it is made from cut and hot or cold stamped sheet metal and has a high resistance due to its enlarged support base and the machining performed by a machine tool in connection areas

  between its base and the mounting area of a bolt.

  Knuckles of the omega type are known which are welded to the rim of the wheel of a vehicle and which have, in the connection zone between the support bases and the mounting zone of a bolt, tearing material due to

cutting.

  These stirrups are subject to considerable solicitation

  various types, such as: bending, shearing and twisting in several directions, depending on the different

  possible load combinations of the wheel, such as

  lerations, braking, lateral sliding, shocks, etc. The presence of loss of material loss has the serious disadvantage that these are places of initiation

breaking of the stirrup.

  In addition, usually the caliper support bases are rather limited and do not realize a good

  distribution of the solicitations at stake.

  The subject of the invention is a stirrup devoid of

  disadvantages mentioned above and which has a high resistance.

  To achieve this objective, according to the invention, a stirrup for fixing a disc to a wheel rim of a vehicle is characterized in that it is made from a blank, sheet metal cut to present a part central rectangular interior and widened end portions, the inner portion being bent omega with a non-rectilinear development of the flanks, and the end portions being folded to apply to said rim with the boundaries of the inner portion being connecting with the boundaries of the end portions by bending which are

  machined by removal of material.

  Structural and functional characteristics,

  as well as the advantages of a stirrup made according to the invention.

  tion, will emerge more clearly from the detailed description which will

  follow, with reference to the appended schematic drawing, by way of non-limiting example, in which:

  FIG. 1 is a top view of the development

  in a plane of a stirrup according to the invention; - Figure 2 is an elevational view of a stirrup; FIG. 3 is a view from above of the stirrup of FIG. 2;

  FIG. 4 is a detail view, in section following

line IV-IV of Figure 3.

  Referring to the drawing, one can see a stirrup according to the invention generally designated by the reference, made by cutting, then hot stamping or

cold.

  The development in a plane 15 of said stirrup 10 comprises a rectangular central inner portion 11, from which laterally extend two lateral end portions or wings 12 with isosceles trapezoidal profile, connected to the central portion 11 by their large size.

  overflowing bases which are connected in 13.

  During stamping, stirrup 10 takes

  the appearance of an omega more or less open, where the central part

  11 is shaped like an inverted U with

  side weaves 14, and the side portions 12 constitute the bearing surfaces of the stirrup 19 on a surface 16 of a

vehicle wheel rim.

  During the plastic deformation work, the fibers in the connection areas 13 are strongly deformed and may have breakout points. Therefore, by means of machining with a chip removal machine, this risk is eliminated by making the deformed regions produced on the connecting curves between the lateral parts 12 and the central part 11 t uniformly realizing. a perfect continuity between the material of the parts 11 and 12, and giving a suitable flatness to the outer faces of the stirrup for

  guarantee a perfect coupling between the stirrup and the disc

  that, and the corresponding fasteners.

  In addition, the increase in the resistance

  gradually widening the connecting section

  between the central body and the rim mounting wings, so as to obtain a larger, more resistant surface

of this section.

  It goes without saying that a stirrup according to the invention may, in addition, have bosses for centering and supporting the bolts, bosses in the support zones for spot welding and that the profile of the omega may to be more or less open, without, however, going out of

framework of the invention.

Claims (5)

  1. Stirrup for fixing a disc to a rim   (16) of a vehicle wheel, characterized in that it is   a cut rectangular blank (11) and enlarged end portions (12), the inner portion (11) being subsequently omega-folded and the end portions (12) ) folded to apply to said rim (16), the boundaries of the inner portion (11) being connected with the boundaries of the end portions (12) by curvatures which are machined   by removal of material after shaping.   2. A stirrup according to claim 1, characterized   in that the folded inner part has stampings lateral sages {14).   3. Caliper according to claim 1, characterized in that the end portions (12) have a profile in isosceles trapezium expanded.   4. Caliper according to claim 1, characterized in that the folded inner portion (11) may have inside of the centering bosses of a locking bolt of the disc.   5. Caliper according to claim 1, characterized in that the end portions have bosses capable of facilitating the spot welding of the stirrup to said rim.