DE102009013502A1 - Device for manufacturing a gearbox housing for a vehicle, comprises a casting mold, where a circular recess, into which a shaft is introducible, is disposed in a part area of the casting mold - Google Patents

Abstract

The device for manufacturing a gearbox housing for a vehicle, comprises a casting mold (1), where a circular recess (2), into which a shaft (3) is introducible, is disposed in a part area of the casting mold. A negative form of a bearing shell (4.1) is eccentrically engraved in a front side (5) of the shaft. The shaft is rotatably disposed into the recess, and is movable from outside of the casting mold. A cast part is inducible in dependent of situation and/or position of the shaft.

Description

The The invention relates to a device for producing a transmission housing according to the preamble of claim 1.

at the conventional production of gearboxes is used for different center distances between the arranged within the transmission countershafts and main shafts each requires a new mold. The different center distances between countershafts and main shafts are structurally conditioned and the gear ratios of a transmission and the resulting different gear sizes dependent.

In the published patent application DE 100 39 835 A1 is described a housing for a motor vehicle transmission, which is designed as a casting with multiple bearings, with a different center distance between countershaft and main shaft is achieved by a different processing of the bearings.

Of the Invention is based on the object, an improved device to specify a gearbox housing.

The The object is achieved by the in the claim 1 specified characteristics solved.

advantageous Further developments of the invention are the subject of the dependent claims.

The Inventive device for producing a Transmission housing for a vehicle includes at least a mold, wherein in a portion of the mold a round Recess is arranged, in which a shaft can be introduced.

In the two end faces of the shaft is a negative mold of a bearing shell eccentrically imprinted and the shaft is in the recess rotatably disposed from outside the mold.

Thereby is a manufacture of gearboxes with different ones Center distances between countershafts and main shafts enabled with a single device. This lowers the Cost of manufacturing the gearbox housing and molds.

The Production times are also shortened as a conversion the castings for gearboxes with different Center distances are eliminated. Instead, the different center distances advantageously through set a rotation of the shaft.

These Twist can be particularly advantageously automatically, for example computer-controlled, realized as part of a production line become.

there demonstrate:

1 a perspective view of a mold for an inner contour,

2 a schematic representation of an apparatus for producing a gear housing, wherein the largest possible axial distance between the negative forms of the bearing shells for countershaft and main shaft is set, and

3 a schematic representation of an apparatus for producing a gear housing, wherein the smallest possible center distance between the negative forms of the bearing shells for countershaft and main shaft is set.

each other corresponding parts are in all figures with the same reference numerals Mistake.

In 1 is a perspective view of a mold 1 shown for an inner contour.

The entire device comprises at least one mold, not shown, for the outer contour and a casting mold 1 for the inner contour of the transmission housing.

The mold for the outer contour is formed as a bottom plate, which is provided with a peripheral edge, which has at least a height which corresponds to a height of the mold 1 Corresponds to the inner contour. This creates a kind of tub shape with an upwardly open cavity. On the inside of the casting mold for the outer contour, a negative of the outer contour of the gear housing is introduced.

The mold 1 for the inner contour is approximately cuboid. On the outside of the mold facing towards the inside of the casting mold for the outer contour 1 for the inner contour is a negative of the inner contour of the gear housing including a bearing shell 4.2 , For example, for a main shaft introduced.

The mold 1 for the inner contour can be arranged in such a way in the cavity of the mold for the outer contour that formed as a further cavity distance between the outside of the mold 1 for the inner contour and the inside of the casting mold for the outer contour is formed, in which the casting material can be introduced.

In a partial area of the casting mold 1 for the Inner contour is a circular recess 2 arranged. This recess 2 is variable in size of its inner diameter b and position.

In this recess 2 is a wave 3 recoverable. This wave 3 is formed such that its outer diameter a with an inner diameter b of the recess 2 corresponds.

In a favorable embodiment, the shaft 3 rotatable in the recess 2 arranged.

In a particularly favorable embodiment, the shaft 3 from outside the mold 1 rotatable in the recess 2 arranged.

In a front page 5 the wave 3 is a negative mold of another bearing shell 4.1 , For example, for a countershaft, impressed.

Particularly advantageous is this negative form of the bearing shell 4.1 eccentric in the front 5 the wave 3 imprinted. By this eccentric arrangement of the negative shape of the bearing shell 4.1 is a distance A and an angle between the negative forms of the bearing shells 4.1 and 4.2 by a rotation of the shaft 3 variable.

In 2 is a schematic representation of the mold 1 shown for the inner contour of the gear housing, wherein the largest possible axial distance A between the negative forms of the bearing shells 4.1 and 4.2 for countershaft and main shaft is set.

In 3 is a schematic representation of the mold 1 represented for the inner contour of the transmission housing, wherein by rotation of the shaft 3 by 180 ° compared to 2 the smallest possible axial distance A between the negative forms of the bearing shells 4.1 and 4.2 for countershaft and main shaft is set.

The distance A is from the position of the recess 2 , the inner diameter b of the recess 2 and the position of the negative mold of the bearing shell 4.1 on the front side 5 the wave 3 dependent. By changing these values, the distance A is slightly variable.

If you assign, for example, the negative shape of the bearing shell 4.1 on the front side 5 the wave 3 close to the outer edge of the front 5 On the one hand, there is a very large maximum distance A between the negative forms of the bearing shells 4.1 and 4.2 allows and in a different position of the shaft 3 on the other hand, a very small minimum distance A between the negative forms of the bearing shells 4.1 and 4.2 allows.

In an alternative particularly advantageous embodiment, the shaft 3 interchangeable and they are different waves 3 with at different position in the front side 5 the wave 3 impressed negative shape of the bearing shell 4.1 used. As a result, by means of a device according to the invention, it is advantageously possible to produce gearbox housings for the most varied center distances A between the countershafts and main shafts arranged within the gearbox.

The material of the casting molds and the shaft 3 preferably has a sufficiently high melting point, a good temperature resistance, a low thermal expansion, a high thermal shock resistance, a maximum wear resistance, a good temperature and thermal conductivity, a good mechanical workability, and is durable and hot rupture resistant. This ensures that the mold is resistant to constantly recurring thermal and mechanical stresses.

The molds and the shaft 3 are formed for example of a metallic material, graphite or ceramic.

The Device according to the invention is particularly suitable good for mass production and / or assembly line production.

For example, the wave 3 in a particularly favorable embodiment from outside the mold 1 rotatable in the recess 2 arranged. This rotation can also be realized automatically, for example computer-controlled.

In a particularly advantageous embodiment is with a rotation of the shaft 3 an indexing of the cast gear housing connected in a manner not shown, so that quickly, easily and possibly fully automatically detected to which gear housing with which center distance A it is.

In Another advantageous embodiment is this Indexing in also not shown kind and manner so machine readable that a Processing machine, which is the cast gear housing subsequently preferably machined, automates a proper Selects a machining program. This will cause operating errors the processing machine safely avoided.

1

mold

2

recess

3

wave

4.1 and 4.2

bearing shell

5

front

a

outer diameter

b

Inner diameter

A

distance

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10039835 A1 [0003]

Claims (6)

Device for producing a transmission housing for a vehicle, at least one casting mold ( 1 ), characterized in that in a partial region of the casting mold ( 1 ) an at least round recess ( 2 ) is arranged, in which a wave ( 3 ) can be introduced. Apparatus according to claim 1, characterized in that in an end face ( 5 ) the wave ( 3 ) a negative mold of a bearing shell ( 4.1 ) is imprinted. Apparatus according to claim 1 or 2, characterized in that the negative form of the bearing shell ( 4.1 ) is impressed eccentrically. Device according to the preceding claims, characterized in that the shaft ( 3 ) in the recess ( 2 ) is rotatably arranged. Device according to the preceding claims, characterized in that the shaft ( 3 ) from outside the mold ( 1 ) is movable. Device according to the preceding claims, characterized in that a casting depending on the position and / or position of the shaft ( 1 ) is indexable.