FR2786236A1 - MULTI-PIECE SYNCHRONIZATION RING, WITH LOW CONSUMPTION OF MATERIAL - Google Patents

Abstract

Synchronization ring (1, 10) comprising a disc body (2, 11) produced from a profile by material-saving machining.

Description

The invention relates to a synchronization ring.

  a synchronization device comprising an annular body

  laire and a radially extending disc body which are

  respectively produced separately and are brought together

  following one another by welding, the annular body being manufactured according to a manufacturing process without removal of

  shavings, having an inner shell surface consisting of

  conically killed, being provided on the envelope surface

  interior conically formed of a surface of fric-

  tion, having at least one drive element and, the disc body being provided on its outer periphery with teeth. Background of the invention A synchronization ring of this type is already known for example from the document DE 32 25 364 Ai. This synchronization ring is constituted by an annular body with a conical inner contour and by a disc body with a toothed crown. The annular body and the toothed crown

  are produced separately from sheet metal by stamping or stamping

  and are then rigidly connected with each other.

  The advantage of this separate production is that

  that we avoid the difficulties encountered in forming the an-

  synchronization rings in one piece with complicated teeth, for example with contours opposite to the direction of deformation. In addition, different materials or hardness steel materials can be used for the ring gear as well as for the annular body.

  different. The disadvantage in the case of such a fabrica-

  tion is that during the stamping of the annular body and in particular of the disc body a high fraction of the sheet

  is lost as cutting or scrap material.

  The fraction of falling material that occurs during the manufacture of the disc body with the toothed crown, is

  for this reason so high that it is generally a

  rale this disc body in the form of a wall ring

  thin with a large internal diameter.

  Synchronization rings of this type are often provided with drive elements which are formed Tir '1r either on the disc body and on the annular body or

  on one of the two elements. They are used for connection by

  plementarity of shape of the external synchronization ring

  laughing with its surrounding construction, for example the synchronization body or with another synchronization ring. These drive elements, constituted in the most diverse embodiments, for example in the form of tenons or tongues, often extend beyond the contour of the disc body or of the annular body and are for this

reason difficult to manufacture.

  The object of the invention is therefore to provide

  rer a synchronization ring, which allows to have a

  manufacture of its disc body with its teeth, in eco-friendly

  leveraging material, and simplified manufacturing of the elements

training elements.

  This problem is solved in that the body of the dis-

  that is produced using a shaping process without removing

  chip body, and the disc body consists of a profile, set in length, which is first of all bent in a circular fashion and then joined and connected by its two cutting edges, and the ring is then preferably formed by deformation depending on the shape of the disc body. A disc body constructed in this way requires only the

  smallest possible quantities of material for its

  brication. The quantity of material and the volume of material of the cut semi-finished product correspond approximately to the quantity

  of material and the volume of material of the finished disc body

  born. The strips of sheet metal or the previously profiled wires are cut from an endless material to the length of the

  around the ring and are shaped by bending and

  continued by joining the ends of the cut. The strip or the material of the wire is profiled beforehand, for example by drawing or by rolling. The joint preferably takes place by welding. The following shaping process, such as forging, pressing and stretching gives the

  disc body its ultimate form. Savings in con-

  The cost of materials is, in particular in the case of mass production, very high. Cutting is essentially limited to the small fraction, which falls during stamping and cutting which delivers the elements

forming.

  Another advantage of disc bodies made in this way is that their shaping

  is not limited by the deformability rules, which determine

  usually undermine the stretching or mastering processes from the stage. This is how contours which are difficult to form and which have undercuts in the initial state are placed in the endlessly drawn material, for example.

by rolling.

  According to a preferred variant of the invention, the disc body is provided on its side facing the annular body with recesses, and the annular body is connected to the

  disc body, in which at least two drive elements

  are connected to the front side of the annular body facing the disc body, and the annular body comes

  in form complementarity with the elements of

  dragging in the recesses of the disc body. In these

  recesses the annular body engages with elements

  drive elements which protrude axially.

  This connection can be removable, therefore be presented under the

  form of a plug connection or be irremovable, in operation

  fixed connection of the drive elements

in the recess.

  In another variant the disc body is

  provided with recesses on its side facing the annular body

  the ring and the annular body is connected to the disc body,

  in which at least two drive elements are connected

  strung to the frontal side of the annular body facing the disc body, and the annular body engages by form complementarity with the drive elements

  in the recesses and the drive elements are blocked

  that are irremovable in the recesses.

  The recesses can in any mode

  of realization, be constituted in the form of bor-

  genes, or pass through the wall of the disc body. The configuration of the drive elements varies according to 1nr -It

  of their application and their charge. Preferably the ele-

  Drive elements must be provided in the area of their connection with the annular body with free cutouts to avoid notch tensions during loads. According to another configuration of the invention, provision is made to block the

  drive elements of the annular body in the recesses

  disc body cannot be removed by welding. It is also conceivable to make push-in connections

press, stamping or stamping.

  According to another configuration of the invention:

  * the disc body is connected to an annular body made up of

killed from several rooms, and

  * the annular body, composed of several parts, is for

  seen from at least one drive element, which is prefabricated

  as a spare part which is then welded to the

annular body.

  The advantage of the synchronization rings

  in several parts of a disc body and a body

  annular generally resides in the fact that the par-

  ties can be combined according to the principle of construction boxes and that there are in this way multiple possibilities of use of the parts. An additional advantage

  is obtained by applying a bond using the elements

  training elements. The annular body with its elements

  is made in the same way as are

  usually the intermediate rings of a synchro-

  nization. In this way the same tools used at least in part for the manufacture of synchronization rings

  intermediates can also be used for manufacturing

  tion of annular bodies on outer rings of syn-

  chronization. When the drive elements are

  prefabricated as spare parts and are welded in

  following with the annular body, this goes in the direction of a

  multiple use of parts and application of the main

construction boxes.

  According to another configuration of the invention: Tir -r * the disc body is connected to the annular body by being

  attached to a section of the outer casing of the body an-

  non-removable, * the disc body is connected to the annular body, by being fixed on a section of the outer casing of the annular body non-removable by welding, * the disc body is connected to the annular body, welding the annular body by the front side facing the disc body, at the front side of the disc body, * the disc body has on its front side facing the annular body, at least one centering strike and the annular body, is welded by means of its front face, facing the disc body, with the disc body in

  alignment on the centering strike.

  A simple and economical connection between the disc body and the annular body is obtained when, as other embodiments of the invention provide,

  the disc body is positioned on a section of the enclosure

  outer lop of the annular body and when it is fixed there preferably by welding or when the disc body and the annular body are welded to each other on the front side. Preferably the annular body is positioned

  on the disc body in this case by means of strikes, in-

  in the disc body. These centering strikes

  can be made up in different ways. It is designed

  vable that a centering strike is formed in the form of an annular recess which goes all around, a recess in which the front side of the annular body

  engages or only protrusions or recesses,

  protruding from the front face of the disc body

  and formed by repression of matter, cooperate reciprocally

  only with elements formed in a complementary manner on the front side of the annular body. Preferably the elements which have just been mentioned are connected to each other.

  others by laser welding or by electrical welding by

sistance. ir -

Short description of the drawings

  The present invention will be described below in more detail on the basis of several embodiments, represented in the appended drawings, in which: * FIG. 1 shows an exemplary embodiment of a synchronization ring according to the invention, in which the disc body and the annular body are connected by means of pins to each other, * Figure 2 shows a longitudinal section through the synchronization body along line II of Figure 1, * Figure 3 shows a longitudinal section through a disc body with recesses made on the front side and which go from end to end, * Figure 4 shows a longitudinal section through an annular body in one piece, * Figure 5 shows a longitudinal section through an annular body with a stud welded to it, * Figure 6 shows another embodiment of a synchronization ring whose disc body is fixed on the outer casing of the annul body area by welding, * Figure 7 shows a longitudinal section through

  the synchronization ring along line VII of figure

  gure 6, * figure 8 shows another embodiment of a synchronization ring in which the annular body and the disc body are welded to each other on the front side, * figure 9 shows a longitudinal section through

  the synchronization ring along line IX-IX of figure

  gure 8, * figure 9a shows a longitudinal section through

  the synchronization ring along line IX-IX of figure

  gure 8 with an alternative configuration compared to the

view shown in Figure 9.

Detailed description of the drawings

  In Figure 1 we have designated by the reference 1 a synchronization ring which consists of a disc body 2 and an annular body 3. On the outer periphery

Ir --r--

  disc body 2 was formed in the form of a

  toothed crown which goes all around a toothing 4. On the annular body 3, as can be seen in particular from FIG. 2, are fixed three drive elements 5, which are distributed regularly around the periphery . These drive elements 5 are welded to the front face of the annular body 3 and rest in recesses 6 in the disc body 2. The recesses 6 are shown in FIG. 3 which is a sectional representation of the spare part of the

  annular body 3 in the form of a through hole.

  Figure 4 shows a longitudinal section through

  towards an annular body 7, as a spare part, which

  consists of a single piece with its driving elements

  ment 7a. An example of a version of an annular body 8, having several parts, is shown in FIG. 5

  schematically. The drive elements 9 are often

  dice to the annular body 8. The annular body 7 and the annular body 8 are connected by means of the driving elements 7a or 9 with each time a disc body 2, while the

  drive elements 7a or 9 are fixed in the recesses

6.

  Figure 6 shows another example of implementation.

  tion of a synchronization ring 10, which consists of a disc body 11 and an annular body 12. On the annular body 12 are fixed three drive elements 13 oriented radially inwardly, which are intended to engage in an interior synchronization ring not shown. As can be seen from Figure 7

  the disc body 11 rests on a section of the annular body

  area 12. The drive elements 13 and the valve body

  that 11 are welded to the annular body 12.

  In FIGS. 8 to 9a another embodiment of a synchronization ring 14 is shown. The annular body 15 is formed in the form of a bowl and is welded on the front side to a disc body 16. In FIG. 9a the annular body 15 is centered and aligned in a strike

  centering 17 relative to the disc body 16.

Ior -rT

NOMENCLATURE OF REFERENCES

  1 Synchronization ring 2 Disc body 3 Annular body 4 Teeth Drive element 6 Recess 7 Annular body 7a Drive element 8 Annular body 9 Drive element Synchronization ring 11 Disc body 12 Annular body 13 Drive element 14 Synchronization ring Annular body 16 Disc body 17 Centering strike

Claims (6)

CLAIMS ON) The synchronization ring (1, 10, 14) of a synchronization device comprising an annular body (3, 7, 8, 12) and a disc body (2, 11), extending radially which are respectively produced separately and are then joined to each other by welding, the annular body (3, 7, 8, 12) * being produced according to a manufacturing process without removal of chips, having a surface inner casing formed in a conical manner, * being provided on the surface inner casing constituted conically of a friction surface, * having at least one drive element (5, 7a, 9, 13), and * the disc body (2, 11) being provided on its outer periphery with a toothing (4), characterized in that the disc body (2, 11) is produced according to a shaping process without removal of shavings , and the disc body (2, 11) consists of a profile, set in length, which is first of all bent circularly and then joined and connected by its two cutting edges.   2) synchronization ring 1 according to claim 1, characterized in that the disc body (2) is provided on its side facing the   annular body (3, 7, 8) of recesses (6), and the annular body   the area (3, 7, 8) is connected to the disc body (2), in which   at least two drive elements (5, 7a, 9) are connected   dice on the front side of the annular body (3, 7, 8) facing the disc body (2), and the annular body (2) comes   taken by complementarity of form with the elements of   drag (5, 7a, 9) in the recesses (6) of the body of disc (2).   3) synchronization ring (1) according to claim 1, characterized in that Tir -T the disc body (2) is provided with recesses (6) on its   side facing the annular body (3, 7, 8) and the an-   ring (3, 7, 8) is connected to the disc body (2), in the   which at least two drive elements (5, 7a, 9) are connected to the front side of the annular body (3, 7, 8) facing the disc body (2), and the annular body (3, 7, 8 ) engages by complementarity of form with the elements   drive (5, 7a, 9) in the recesses (6) and the elements   drive elements (5, 7a, 9) are blocked visible in the recesses (6).   4) Synchronization ring (1, 10) according to the claim   tion 1, characterized in that * the disc body (2, 11) is connected to an annular body (12) made up of several parts, and * the annular body (12), made up of several pieces, is provided with at least one drive element (5, 9, 13), which is prefabricated as a spare part and which is   then welded to the annular body (3, 8, 12).   ) Synchronization ring (10) according to claim 1, characterized in that the disc body (11) is connected to the annular body (12) by being fixed on a section of the outer casing of the body   annular (12) cannot be removed.   6) synchronization ring (10) according to claim 1, characterized in that the disc body (11) is connected to the annular body (12) by being fixed on a section of the outer casing of the body   annular (12) cannot be removed by welding.   7) synchronization ring (14) according to claim 1, characterized in that the disc body (16) is connected to the annular body (15), by welding the annular body (15) by the front side turned the   towards the disc body (16, on the front side of the disc body that '(16).   8) synchronization ring (14) according to claim 1, characterized in that the disc body (16) has on its front side facing the annular body (15) at least one centering strike (17), and the body ring (15) is welded by means of its front face facing the disc body (16), with the disc body (16) in alignment with the centering strike (17).