Method for producing an aluminum cylindrical hollow body for a vehicle transmission and a cylindrical hollow body

Patent metadata

Field	Value
Publication number	US-2022241908-A1
Application number	US-202017612447-A
Country	US
Kind code	A1
Filing date	May 19, 2020
Priority date	May 20, 2019
Publication date	Aug 4, 2022
Grant date	—

Abstract

The relates to a method for producing and machining a cylindrical hollow body constructed of aluminium or an aluminium alloy and for arranging said hollow body in a motor vehicle transmission. The hollow body is produced by a casting process such that the hollow body has an inner and an outer lateral surface and has teeth in at least one sub-region of the inner lateral surface. For machining, the hollow body is centrally clamped. The hollow body is arranged in the vehicle transmission by tooth flanks of the internal teeth. In the disclosed method according to the disclosure, the hollow body is centrally clamped at a tip diameter of the internal teeth. The disclosure further relates to a corresponding cylindrical hollow body and to a corresponding vehicle transmission.

First claim

1 . A method for producing and machining a cylindrical hollow body constructed of aluminium or an aluminium alloy and for arranging said hollow body in a motor vehicle transmission, the method comprising: providing a hollow body that is produced by a casting in such that the hollow body has an inner and an outer lateral surface, and has an internal tooth system in at least one subregion of the inner lateral surface, clamping the hollow body centrally for machining, and arranging the hollow body in a vehicle transmission by the tooth flanks of the internal tooth system, wherein the clamping of the hollow body is done centrally is done on a tip circle diameter of the internal tooth system.

2 . The method as claimed in claim 1 , wherein the casting process is carried out as a diecasting process.

3 . The method as claimed claim 1 , wherein the inner lateral surface is finish-turned as part of the machining of the hollow body, but the at least one subregion remains un-finish-turned.

4 . The method as claimed in claim 1 , wherein the hollow body is balanced as part of the machining process.

5 . The method as claimed in claim 1 , wherein the production of the hollow body takes place such that the tip circle diameter remains contact-free after the hollow body has been arranged in the vehicle transmission.

6 . The method as claimed in claim 1 , wherein the production of the hollow body takes place such that the hollow body has an internal tooth system in each of two subregions of the inner lateral surface.

7 . The method as claimed in claim 1 , wherein the hollow body undergoes at least one deburring, brushing, and washing as part of the machining of the hollow body.

8 . A cylindrical hollow body, constructed of aluminium or an aluminium alloy, wherein the hollow body is produced by a method as claimed in claim 1 .

9 . A vehicle transmission, comprising at least one cylindrical hollow body as claimed in claim 8 .

10 . The method as claimed claim 1 , wherein the outer lateral surface is finish-turned as part of the machining of the hollow body, but the at least one subregion remains un-finish-turned.

11 . The method as claimed in claim 1 , wherein the inner and outer surfaces are finished-turned as part of the machining of the hollow body, but at least one subregion remains un-finish-turned.

12 . The method as claimed claim 2 , wherein the outer lateral surface is finish-turned as part of the machining of the hollow body, but the at least one subregion remains un-finish-turned.

13 . The method as claimed in claim 2 , wherein the inner and outer surfaces are finished-turned as part of the machining of the hollow body, but at least one subregion remains un-finish-turned.

14 . The method as claimed in claim 1 , wherein at least one of the inner and outer surfaces are finished-turned as part of the machining of the hollow body, but at least one subregion remains un-finish-turned.

15 . The method as claimed in claim 14 , wherein the hollow body is balanced as part of the machining process.

16 . The method as claimed in claim 15 , wherein the hollow body undergoes at least one deburring, brushing, and washing as part of the machining of the hollow body.

17 . The method as claimed in claim 2 , wherein the hollow body is balanced as part of the machining process.

18 . The method as claimed in claim 3 , wherein the hollow body is balanced as part of the machining process.

19 . The method as claimed in claim 3 , wherein the hollow body undergoes at least one deburring, brushing, and washing as part of the machining of the hollow body.

20 . The method as claimed in claim 1 , wherein the production of the hollow body takes place such that the hollow body has an internal tooth system in each of two subregions of the inner lateral surface and the tip circle diameter remains contact-free after the hollow body has been arranged in the vehicle transmission.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Ruhl Christian
• Boehm Helmut
• Brehmer Martin

Classifications

• B22D25/02

  by its peculiarity of shape; of works of art {(cylinders, pistons B22D15/02)} · CPC title

• F16H2057/02043

  for vehicle transmissions · CPC title

• B23P15/14 Primary

  gear parts, e.g. gear wheels · CPC title

• F16H57/043

  within rotary parts, e.g. axial channels or radial openings in shafts · CPC title

• F16H57/023

  Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly · CPC title