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Pump housing part

Pump housing part description/claims

The invention relates to a housing part, in particular a pump housing part, having a functional unit, in particular a metering unit, that is secured releasably, or in other words repeatedly separably without destruction, and in pressure-tight fashion to the housing part.

Conventional metering units for instance have a flange with through holes for screws with which the flange is secured to the pump housing part. The orientation of the metering unit with the pump housing part is defined by the disposition of the through holes. This can lead to space conflicts when the pump housing part or the associated pump is installed in a motor vehicle. It is also possible to secure a metering unit to a housing part with the aid of a union nut. The union nut requires a relatively large amount of free space, to make access possible for an installation tool.

The object of the invention is to optimize the securing of a functional unit, in particular a metering unit, to a housing part, in particular a pump housing part.

In a housing part, in particular a pump housing part, having a functional unit, in particular a metering unit, which is secured releasably, that is, repeatedly nondestructively separably, and in pressure-tight fashion on the housing part, attained in that on the housing part, a collar is provided, which has a tapered collar face on which a first tapered face of at least one tapered element rests, which element has a second tapered face on which a tapered ring face of a tapered ring comes into contact when the tapered ring is moved from an open position to a closed position, in order to press a positive-engagement face of the tapered element against a counterpart face that is provided on the functional unit. The invention creates an easily installed positive- and nonpositive-engagement connection between the functional unit and the housing part. The functional unit can be oriented in arbitrary directions relative to the housing part. No screw bores need to be made in the housing part. For both the connection itself and for installation, only little space is needed.

A preferred exemplary embodiment of the housing part is characterized in that the collar extends over a circumferential angle of more than 180° and less than 360°, so that the collar is not embodied continuously in the circumferential direction but instead has a mounting opening. The mounting opening enables insertion of the tapered element between the counterpart face and the tapered collar face.

A further preferred exemplary embodiment of the housing part is characterized in that the collar extends over a circumferential angle of approximately 270°. The mounting opening then extends over a circumferential angle of approximately 90°. This facilitates the insertion of the tapered element or a plurality of tapered elements.

A further preferred exemplary embodiment of the housing part is characterized in that at least two tapered elements are disposed between the tapered collar face and the counterpart face. As a result, stable securing of the functional unit to the pump housing part is assured.

A further preferred exemplar embodiment of the housing part is characterized in that the counterpart face is provided on a rim that is embodied on the functional unit. Preferably, the rim extends in the radial direction on the side of the functional unit toward the pump housing part.

A further preferred exemplary embodiment of the housing part is characterized in that the second tapered face is disposed at an angle of 81 to 89° relative to the positive-engagement face of the tapered element. Preferably, an angle of approximately 85° is enclosed between the second tapered face and the positive-engagement face.

A further preferred exemplary embodiment of the housing part is characterized in that the second tapered face is disposed at an angle of 40 to 90° relative to the first tapered face of the tapered element. Preferably, an angle of approximately 65° is enclosed between the first and second tapered faces of the tapered element.

A further preferred exemplary embodiment of the housing part is characterized in that the tapered ring has an annular groove extending in the circumferential direction. The annular groove creates an engagement capability for an installation tool, with which the tapered ring can be loosened as needed in order to dismantle the functional unit.

Further advantages, characteristics and details of the invention will become apparent from the ensuing description, in which one exemplary embodiment is described in detail in conjunction with the drawings. The characteristics recited in the claims and mentioned in the description may each be essential to the invention individually or in arbitrary combination with one another.

Shown are:

FIG. 1, a pump housing part with a metering unit in the preassembled state, in section;

FIG. 2, an enlarged view of a detail marked II in FIG. 1;

FIG. 3, the pump housing part of FIG. 1 with the metering unit in the installed state, in section; and

FIG. 4, an enlarged view of a detail marked IV in FIG. 3.

• Provisional Patent
• Utility Patent

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