Internal gear pump including a separating piece

摘要

An internal gear pump for a slip-controlled hydraulic vehicle braking system has a pinion, an internal gear and a separating piece which is arranged between the pinion and the internal gear. The internal gear pump also has an inner part and an outer part, and separates a suction chamber from a pressure chamber. The separating piece is configured to protrude counter to a rotational direction of the internal gear pump beyond a sealing point of the inner part on the outer part such that the inner part and the outer part bear in front of the sealing point against at least one tooth tip of a tooth of the pinion and of the internal gear of the internal gear pump. As a result, tilting of the inner part and of the outer part away from the pinion and from the internal gear about the sealing point is avoided.

主权项

1. An internal gear pump for a hydraulic vehicle braking system, comprising:
an internally toothed ring gear; an externally toothed pinion arranged eccentrically in the ring gear, the pinion configured to mesh with the ring gear in a segment of a circumference of the ring gear; and a separating piece arranged in a crescent-shaped pump space formed between the pinion and the ring gear opposite the segment of the circumference, the separating piece configured to divide the pump space into a suction space and a pressure space, the separating piece having an inner part and an outer part configured to move relative to one another in a radial direction, wherein: the inner part rests on tooth tips of teeth of the pinion, is subjected to pressure on an outer side, and is pushed inwardly against the tooth tips of the teeth of the pinion, the outer part rests on tooth tips of teeth of the ring gear, is subjected to pressure on an inner side, and is pushed outwardly against the tooth tips of the teeth of the ring gear, the inner part and the outer part are sealed off with respect to one another at a sealing location in order to seal off the pressure space from the suction space, and the inner part and the outer part are configured to protrude in a circumferential direction to an extent beyond the sealing location, counter to a direction of rotation of the internal gear pump, such that the inner part and the outer part always rest on at least one tooth tip of a tooth of the pinion or of the ring gear ahead of the sealing location.