Pump assembly, in particular for generating pressure in a brake circuit of a controllable power brake system of a motor vehicle
AssigneeRobert Bosch GmbH
InventorsAndreas Weh, Martin Hagspiel, Matthias Mayr
Life of this patent
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Abstract
A pump assembly for generating pressure in a brake circuit of a controllable power brake system of a motor vehicle. The pump assembly has, as a pressure generator, a piston-cylinder unit in which a piston is actuated with the aid of a piston drive. The piston drive converts a rotational movement, with which a nut of this piston drive is driven, into a translatory movement of a spindle, which is in turn connected to the piston in a rotationally fixed manner. The piston is a steel component in which a plastic deformation at a piston head forms a device for connecting the spindle to the piston in a rotationally fixed manner.
Claims10
A pump assembly for generating pressure in a brake circuit of a controllable power brake system of a motor vehicle, the pump assembly comprising:
- a piston-cylinder unit including a piston, and
- a cylinder in which the piston is displaceably received and delimits a working chamber;
- a piston drive configured to drive the piston,
- the piston drive having a nut which is configured to be driven for rotational movement;
- and
- a spindle, which executes a translatory movement, and cooperates at least indirectly with the nut and is connected to the piston in a rotationally fixed manner;
- wherein the piston is a steel component having a piston skirt and a piston head, in which a plastic deformation at the piston head forms a device by which the spindle is to be connected to the piston in a rotationally fixed manner.
Dependencies are inferred from the claim text.