Piston pump assembly for a hydraulic power vehicle braking system
AssigneeRobert Bosch GmbH
InventorsAndreas Weh, Matthias Mayr, Matthias Koehler
Life of this patent
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Abstract
A piston pump assembly for a hydraulic power vehicle braking system including an electric motor, a planetary gear, a worm gear, and a piston displaceable in a cylinder. For an anti-rotation protection of the piston in the cylinder, the piston includes a ring rotationally-fixed thereto by a form fit and connected thereto by forming, including semicircular grooves at its outer circumference, in which cylinder pins engage, which are situated fixed axially-parallel in the cylinder.
Claims9
A piston pump assembly for a hydraulic vehicle braking system, comprising:
- an electric motor;
- a worm gear, which is rotationally drivable using the electric motor and converts a rotational movement of the electric motor into a displacement;
- and
- a piston-cylinder unit having a cylinder and a piston, which is displaceable using the worm gear in the cylinder;
- wherein the piston includes a radially protruding rotation-locking element, which supports itself axially movably in the circumferential direction at a thrust bearing of the cylinder.
A hydraulic block for a hydraulic vehicle braking system, comprising:
- a piston pump assembly, including:
- an electric motor;
- a worm gear, which is rotationally drivable using the electric motor and converts a rotational movement of the electric motor into a displacement;
- and
- a piston-cylinder unit having a cylinder and a piston, which is displaceable using the worm gear in the cylinder;
- wherein the piston includes a radially protruding rotation-locking element, which supports itself axially movably in the circumferential direction at a thrust bearing of the cylinder;
- wherein the cylinder is situated in a receptacle of the hydraulic block for the cylinder and/or the electric motor is situated on the hydraulic block.
Dependencies are inferred from the claim text.