DE102005029525A1 - Deformation process to join a sheet metal tube to a solid automotive drive shaft by expanding a sheet metal nipple within a pre-drilled blind hole - Google Patents

Abstract

In a deformation process to join a sheet metal tube (1) with an automotive drive shaft (2), the tube end has a flange with a number of nipple (8) apertures that engage with drilled blind holes (7) in the shaft-end (2). The nipple collar is expanded against the hole and secured by insertion of a calibration pin (6).

Description

The The present invention relates to the connection between a sheet metal part and a shaft, in particular in a transmission of a motor vehicle, according to the preamble of claim 1

In Automatic transmissions need often sheet metal parts, such as plate carrier of switching elements transmission shafts rotatably connected. It is known from the prior art For this purpose welding process like laser welding or electron beam welding apply.

There Gear shafts are usually case hardened before welding To be rotated without action, which disadvantageously in an increased Expense results. Furthermore, welding processes require like laser welding and electron beam welding complex and expensive welding equipment.

Of the present invention is based on the object, a compound specify between a sheet metal part and a shaft through which the Disadvantages of the known from the prior art sheet metal part-shaft connections be avoided. In particular, for the preparation of the compound welding process be avoided; The compound of the invention should also be inexpensive to produce be and allow a simplified installation.

These The object is solved by the features of claim 1. Further Embodiments of the invention and advantages are apparent from the dependent claims.

Therefore is a connection between a sheet metal part and a shaft, in particular in a transmission of a motor vehicle, proposed which as Forming compound performed is.

According to one preferred embodiment of Invention has the shaft to be connected to the sheet metal part axially arranged bores, wherein on the sheet metal part according to the Holes of the shaft penetrations are provided.

Preferably is the outside diameter the settings of the sheet metal part before assembly so dimensioned that under consideration of all tolerances sufficient clearance between the holes in the Shaft and the throats is present, for easy assembly to enable.

Around the connection between the shaft and the sheet metal part to play Shape the holes with a suitable calibration tool or calibration pin widened so that the settings on the inner diameter of the holes are pressed. This will ensure that the sheet metal part by load change reactions in the field of forming compound not damaged can be.

By the concept of the invention is provided a connection between the shaft and the sheet metal part, which without welding process economical can be produced and allows easy installation.

The Invention will be described below with reference to the accompanying figures, which is a compound of the invention between a plate carrier represent as a sheet metal part and a variator, explained in more detail by way of example.

It demonstrate:

1 a schematic sectional view of the connection according to the invention between a plate carrier and a variator shaft in the first phase of assembly;

2 a schematic sectional view of the connection according to the invention between a plate carrier and a variator shaft in the second phase of assembly;

3 a schematic sectional view of the connection according to the invention between a plate carrier and a variator shaft in the third phase of the assembly and

4 a schematic sectional view of the connection according to the invention between a plate carrier and a variator shaft after installation.

In the 1 to 4 is a plate carrier with 1 and a variator shaft with 2 designated. According to the invention, the connection between the plate carrier 1 and the variator shaft 2 as forming compound 5 educated.

Here, the variator comprises 2 axially arranged holes 7 , in accordance with the drilling 7 arranged throats 8th of the disk carrier 1 (a hole is shown in the figures) 1 The first phase of assembly is shown at which the punctures 8th into the holes 7 are arranged. In this phase, the plate carrier has 1 in the holes 7 the Va riatorwelle 2 clear air.

To the connection 5 play-free, the Durchstellungen become 8th with a suitable calibration tool or calibration pen 6 widened so that the punctures 8th to the inner diameter of the holes 7 be pressed. This is the subject of 2 and 3 , where in 2 the calibration pen 6 and the connection 5 before the forming process and in 3 are shown after the forming process. The finished, backlash-free connection 5 between the variator shaft 2 and the plate carrier 1 is the subject of 4 ,

In the context of an advantageous development of the invention, a circlip is used for axial fixation 3 provided, as in the 1 to 4 shown. Preferably, the locking ring 3 in corresponding annular grooves on the sheet metal part 1 and on the wave 2 arranged.

In the event that only small axial forces must be transmitted, this circlip can be omitted. Also omitted is the circlip 3 even if the holes 7 in the wave 2 are executed with an undercut, thereby calibrating the punctures 8th can be carried out so that the sheet metal part is additionally fixed axially after forming an undercut.

According to the invention, in the event that a pressure chamber must be sealed, a sealing element 4 be provided, as in the 1 to 4 illustrated. The sealing element 4 can in a corresponding groove on the sheet metal part 1 be arranged.

Of course, too Any constructive design of the compound of the invention between a Sheet metal part and a shaft, in particular the shape of the constrictions and drilling, as far as technically reasonable, under the scope of protection the present claims, even if these trainings are not explicitly in the figures or are shown in the description.

1

Sheet metal part, plate carrier

2

Wave, Gear shaft, variator shaft

3

circlip

4

sealing element

5

Umformverbindung

6

calibration pin

7

drilling

8th

by position

Claims (6)

Connection between a sheet metal part and a shaft, in particular in a transmission of a motor vehicle, characterized in that it is used as a forming connection ( 5 ) is executed. Connection between a sheet metal part and a shaft according to claim 1, characterized in that the with the sheet metal part ( 1 ) to be connected ( 2 ) axially arranged bores ( 7 ), wherein on the sheet metal part ( 1 ) corresponding to the holes ( 7 ) the wave ( 2 ) Enforcements ( 8th ) provided in the bores ( 7 ) are arranged and by means of a calibration tool ( 6 ) are flared so that they to the inner diameter of the holes ( 7 ), so that the forming connection ( 5 ) is designed without play. Connection between a sheet metal part and a shaft according to claim 1 or 2, characterized in that the outer diameter of the throats ( 8th ) of the sheet metal part ( 1 ) is dimensioned prior to assembly such that, taking into account all tolerances sufficient clearance between the holes ( 7 ) in the wave ( 2 ) and the enforcements ( 8th ) is provided for easy installation. Connection between a sheet-metal part and a shaft according to claim 1, 2 or 3, characterized in that for axial fixing a locking ring ( 3 ) is provided which in corresponding annular grooves on the sheet metal part ( 1 ) and on the shaft ( 2 ) is arranged. Connection between a sheet metal part and a shaft according to one of the preceding claims, characterized in that the bores ( 7 ) in the wave ( 2 ) are performed with an undercut, whereby the calibration of the settings ( 8th ) is executable such that the sheet metal part ( 1 ) is additionally axially fixed after forming with the undercut. Connection between a sheet metal part and a shaft according to one of the preceding claims, characterized in that in the event that a pressure chamber must be sealed, a sealing element ( 4 ) is provided.