DE102007025838A1 - Electrical machine e.g. electrically driven engine, centering arrangement, has bearing section with section enclosing front side of bearing, where section has end area that makes angle with primary area of section and forms centering unit - Google Patents

Abstract

The arrangement (1) has an electrical machine (2) with a shaft (4) that is supported in a housing by using a bearing (5). The electrical machine has a bearing recess (7) forming a centering unit (8). A section (11) of the bearing recess encloses an outer peripheral area of the bearing, and a section (12) of the recess encloses a front side (14) of the bearing. The section (12) has an end area (15) that makes an angle with a primary area (16) of the section (12) and forms the centering unit.

Description

The The invention relates to an arrangement for centering an electrical Machine on an application according to the preamble of claim 1.

electrical Machines, in particular electrically driven motors, are often for driving applications, e.g. Pumps or steering gears, used. Because the applications themselves are usually very compact are and have too little space inside, the electrical Machines often Outside on the case the application mounted, with the shaft of the electric machine into the housing interior the application sticks out and drives the application.

at the assembly of the electric machine on the application must be on it Pay attention to the optimal position of the application projecting wave can be accurately determined and adhered to. Compliance the axial position is less of a problem here. Only the radial centering of the shaft of the electric machine in the passage opening to Application requires a greater effort and is not that easy to determine and follow.

To solve the problem of centering the shaft of the application / bracket is in the DE 33 32 036 A1 proposed on the side of the electric machine to design their bearing receptacle as a conical centering unit and to provide on the side of the application / holder whose housing with a Zentrieraufnahme, which has an inner cone surface and which is concentric with the through hole.

These solution However, has the disadvantage that the conical configuration of the bearing seat of the Electric machine very expensive is to produce and there is a risk that their design on the quality the bearing seat adversely affects.

Of the The present invention is therefore based on the object, a simple and cost-effective Arrangement for centering an electrical machine on a To enable application which has no negative impact on the quality of the bearing seat, and If necessary, the replacement of the electric motor without damaging the Application allowed.

The sees solution according to the invention before that the bearing receptacle with a first section the outside peripheral surface of the warehouse and with a second section the application turned Enclosing the front of the bearing, wherein the second portion has an end portion associated with the Beginning portion of the second section includes an angle and the Centering unit forms.

Consequently Is it possible, at assembly of the engine on application on additional Zentriermaßnahmen to dispense with the design of the bearing seat by the Centering unit is influenced in any way. The bearing seat So, if possible optimized for his real task, namely the Fixing the bearing to be constructed.

In a preferred embodiment - especially if the bearing holder consists of a deep-drawn sheet metal - is the Centering unit formed by a conical passage. The draft draws characterized in that the edge of the bore in the end plate or casing at least in sections axially outward by a certain angle converted. The draft does not necessarily have a closed one Circle, but it can e.g. from three segments, evenly with one 60 ° pitch distributed over 360 ° are exist. The training of the passage requires no separate tool; he can in the usual Thermoforming tool can be integrated.

In a further embodiment - preferably if the bearing holder consists of a spray, rotary or cast part - can Centering unit formed by a conical collar. The Bund can be characterized by an accumulation of material, which the for the Centering necessary angle forms. Even the federal government can already be integrated into the injection mold and thus usually requires none additional Expenses. Alternatively, the federal government can also be integrated into a casting mold be.

It is to mention that it is for the invention is irrelevant, whether the bearing support by a bearing plate or the housing the electric machine is formed.

Preferably the bearing is designed as a fixed bearing. This allows a longer Life of the electrical machine.

The inserted into the application centering is preferably through an inner cone surface into which the centering unit, which practically forms an outer cone surface, is inserted. Also a standard in many holes incorporated Chamfer represents such an inner cone surface. The receiving surface of Centering can also consist of a rounding with a radius.

Further Features, advantages and advantageous embodiments of the invention arise from the dependent ones claims, and from the following description of the invention with reference to the attached Drawings.

It demonstrate:

1 : Inventive arrangement for centering an electrical machine on an application

2 : Centering unit and centering receiver in detail

1 shows an arrangement ( 1 ) consisting of an electric machine ( 2 ), in this case an electric motor, which is used to drive an application ( 3 ) is attached to the housing. The application ( 3 ) itself is not shown here, but only the housing contour. In the application ( 3 ) may be, for example, a pump or a steering gear.

The wave ( 4 ) of the electric machine ( 2 ) protrudes through an opening in the bearing receiver ( 7 ) and through a hole ( 13 ) in the housing of the application in the interior of the application ( 3 ) into it. The bearing receiver ( 7 ), designed here as a bearing plate, is divided into two sections ( 11 . 12 ). The first paragraph ( 11 ) the warehouse ( 5 ) of the side of the electric machine to be centered ( 2 ) on the outer peripheral surface with eg a press fit. The fit between the bearing plate and the bearing can also be designed as a clearance (floating bearing). With a second section ( 12 ), which from the first section ( 11 ) extends to the opening in the bearing receptacle, the bearing receptacle ( 7 ) the end face ( 14 ) of the warehouse ( 5 ) with an initial range ( 16 ). The end area ( 15 ) of the second section ( 12 ) is - converted in this example by means of a thermoforming tool - to the outside, so that the end region ( 15 ) with the starting area ( 16 ) includes an angle (α). This rearranged end area ( 15 ) forms on the side of the electric machine ( 2 ) the centering unit ( 8th ). On page of the application ( 3 ) is a centering receiver ( 9 ) brought in. This consists of an inner cone surface - in this example of a chamfer or rounding, which in the electrical machine facing end face of the bore ( 13 ) is introduced. The centering unit ( 8th ) and the centering receiver ( 9 ) are formed such that when mounting the electric machine ( 2 ) on the application ( 3 ) the centering unit ( 8th ) in the centering receptacle ( 9 ) and due to their conical shape and concentric configuration a simple but effective centering of the electric machine ( 2 ) on the application ( 3 ) is achieved without causing increased manufacturing costs.

2 shows the centering unit ( 8th ) of the electric machine ( 2 ) and the centering receiver ( 9 ) of the application ( 3 ) as enlarged detail. Here it is easy to see that the centering unit ( 8th ) by changing the end shield ( 7 ) is formed. The angle (α) that the centering unit ( 8th ) with the starting area ( 16 ), corresponds in this exemplary representation, the angle (β) of the centering ( 9 ). However, in practice, the angles (α) and (β) may also be different so as to obtain even more accurate centering by the resulting material deformation in this area.

1

arrangement

2

electrical machine

3

application

4

wave

5

camp

6

casing

7

bearing seat

8th

centering

9

centering

11

first section

12

second section

13

drilling

14

front

15

end

16

initial region

α

angle centering

β

angle centering

Claims (7)

Arrangement for centering an electric machine on an application, wherein the electric machine has a shaft which is mounted by means of at least one bearing in a housing, and the electric machine has a bearing receptacle, which at least partially forms a centering unit, and wherein the application is a centering which accommodates the centering unit of the electric machine, characterized in that the bearing receiver ( 7 ) with a first section ( 11 ) the outer circumferential surface of the bearing ( 5 ) and with a second section ( 12 ) which are used ( 3 ) facing front side ( 14 ) of the warehouse ( 5 ), the second section ( 12 ) an end region ( 15 ), which coincides with the starting area ( 16 ) of the second section ( 12 ) includes an angle (α) and the centering unit ( 8th ). Arrangement according to claim 1, characterized in that the centering unit ( 8th ) is formed by a conical passage. Arrangement according to claim 1, characterized in that the centering unit ( 8th ) is formed by a conical collar. Arrangement according to one of claims 1 to 3, characterized in that the bearing receptacle ( 7 ) through the end shield of the electric machine ( 2 ) is formed. Arrangement according to one of claims 1 to 3, characterized in that the bearing receptacle ( 7 ) through the housing ( 6 ) of the electric machine ( 2 ) is formed. Arrangement according to one of claims 1 to 5, characterized in that the bearing ( 5 ) is designed as a fixed bearing. Arrangement according to one of claims 1 to 6, characterized that the centering by a introduced into the application Internal conical surface or chamfer is formed.