Method for manufacturing a clutch body

Abstract

A method for manufacturing a clutch body for a synchronizing device of a transmission includes the steps of: a) providing an externally toothed clutch disk, b) providing a counterfriction ring, c) applying a friction lining onto the counterfriction ring, d) establishing a non-releasable connection between the clutch disk and the counterfriction ring, and e) upsetting a portion of the counterfriction ring at least partly provided with the friction lining in radially inwardly facing direction, so that a counterfriction cone is formed, which is provided for cooperation with a friction surface of the synchronizer ring.

Claims

1. A method for manufacturing a clutch body for a synchronizing device of a transmission, comprising the steps of: a) providing an externally toothed clutch disk which is configured for cooperation with a sliding sleeve, b) providing a counterfriction ring which is configured for cooperation with a synchronizer ring, wherein the counterfriction ring has an at least sectionally circularly cylindrical tubular shape, c) applying a friction lining onto the counterfriction ring, d) establishing a non-releasable connection between the clutch disk and the counterfriction ring, and thereafter e) upsetting and thereby plastically deforming the at least sectionally circularly cylindrical portion of the counterfriction ring at least partly provided with the friction lining in radially inwardly facing direction, so that a counterfriction cone is formed, which is provided for cooperation with a friction surface of the synchronizer ring.

2. The method according to claim 1, wherein in method step c) the friction is applied onto an external shell surface of the counterfriction ring in a circumferentially closed manner.

3. The method according to claim 1, wherein the clutch disk and the counterfriction ring are connected with each other by flow molding, caulking, riveting and/or welding.

4. The method according to claim 1, wherein the clutch disk includes at least one abutment surface configured for supporting the counterfriction ring on the clutch disk in a radially inwardly facing direction.

5. The method according to claim 1, wherein step d) is carried out after step c).

6. The method according to claim 1, wherein the clutch disk and the counterfriction ring include form elements in a form of recesses and axially projecting protrusions configured for establishing a non-releasable positive connection.

7. The method according to claim 6, wherein the counterfriction ring includes the axially projecting protrusions configured to engage into the recesses formed on the clutch disk to establish the non releasable positive connection.

8. The method according to claim 7, wherein the recesses are circumferentially closed, axially continuous windows in the clutch disk.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the drawing:

(2) FIG. 1 schematically shows a clutch body manufactured by the method according to the invention.

DETAILED DESCRIPTION

(3) FIG. 1 shows a clutch body 10 for a synchronizing device of a transmission.

(4) The clutch body 10 includes a clutch disk 12 which has an external toothing 14. The external toothing 14 is provided for cooperation with an internally toothed sliding sleeve (not shown).

(5) In addition, the clutch body 10 comprises a counterfriction ring 16 which is provided for cooperation with a synchronizer ring 30. The counterfriction ring 16 has a counterfriction cone 18 on which a friction lining 20 is applied. The friction lining 20 is provided for cooperation with a friction surface of the synchronizer ring 30 which is depicted in a symbolized manner.

(6) The clutch disk 12 and the counterfriction ring 16 are non-releasably connected with each other. The counterfriction ring 16 includes axially projecting protrusions 22 which engage into recesses 24 provided at the clutch disk 12. The recesses are provided in several windows arranged on a circle, circumferentially closed as seen in axial direction, i.e. framed in a circumferentially closed manner, which can be produced by stamping.

(7) In the region of the protrusions 22 the clutch disk 12 includes an abutment surface 26 as part of the window boundary, which is provided to support the counterfriction ring 16 in radially inwardly facing direction.

(8) The clutch body 10 has a centric opening whose rim is seated on an idler gear 28 and is non-rotatably connected there with the idler gear 28, e.g. by plastic deformation, press fit or welding.

(9) A method for manufacturing such clutch body 10 will now be described in detail below.

(10) Initially, the externally toothed clutch disk 12 is provided.

(11) Separately and independent of the externally toothed clutch disk 12 the counterfriction ring 16 is provided in the form of a circularly cylindrical tube.

(12) The friction lining 20 is applied onto the counterfriction ring 16. This can be effected for example by coating, in particular stray sintering, or by gluing a friction lining prepared already.

(13) For establishing a non-releasable connection, the counterfriction ring 16 e.g. is caulked with the clutch disk 12. In the connected condition, the axially projecting protrusions 22 of the counterfriction ring 16 engage into the recesses 24 of the clutch disk 12.

(14) The recesses 24 and protrusions 22 can be produced for example by machining before connecting the components 12, 16.

(15) Finally, the counterfriction cone 18 of the counterfriction ring 16 is formed. For this purpose, the counterfriction ring 16 provided with the friction lining 20 is upset in the region of the friction lining 20 in radially inwardly facing direction, e.g. by pushing an internal cone onto the same. After the upsetting operation, the counterfriction ring 16 is conically tapered in a direction pointing away from the clutch disk 12.