Dual pump group with mechanical drive comprising a centrifugal clutch
AssigneeIndustrie Saleri Italo S.p.A.
InventorsAlfonso Surace, Marco Pedersoli
Life of this patent
Estimating the term…
Abstract
A pump group for a cooling system of an engine of a vehicle, of the dual type is provided. The pump group includes an impeller mounted on a shaft commandable in rotation by an electric drive and a mechanical drive. The mechanical drive includes a rotating member commandable in rotation by mechanical movement devices in the vehicle, a rotary drum operatively connected to the shaft, a centrifugal clutch device including a central body integrally attached to the rotating member and a plurality of engagement elements movably fixed on the central body suitable to translate in a radial direction with respect to the axis (X-X) to engage the rotary drum.
Claims15
A pump group for a cooling system of an engine of a vehicle, the pump group extending along an axis (X-X) and comprising:
- i) a shaft extending along the axis (X-X);
- ii) an impeller rotatable around the axis (X-X) and operatively connected to the shaft;
- iii) an electric drive comprising an electric motor operatively connected to the shaft for commanding the shaft in rotation, wherein the electric motor comprises a rotor and a stator;
- and
- iv) a mechanical drive comprising:
- a rotating member having a center of rotation on the axis (X-X), which is commandable in rotation by mechanical movement devices comprised in the vehicle, comprising the motor shaft of the engine of the vehicle;
- a rotary drum operatively connected to the shaft for commanding the shaft in rotation, comprising an annular crown concentric with respect to the axis (X-X) and comprising an inner surface extending parallel to the axis (X-X);
- and
- a centrifugal clutch device comprising:
- m) a central body integrally attached to the rotating member extending along the axis (X-X);
- and
- n) a plurality of engagement elements fixed in a movable manner on the central body, each engagement element of said plurality of engagement elements comprising a contact portion extending along a circumferential arc, wherein each engagement element of said plurality of engagement elements is suitable to move in a radial direction with respect to the axis (X-X) between a rest position, wherein it is proximal to the central body and is separated from the annular crown, and an engagement position, wherein it is spaced apart from the central body and engages, by a radial friction action, the inner surface of the annular crown;
- wherein the electric drive comprises an electrical unidirectional coupling, wherein the rotor is operatively connected to the shaft by the electrical unidirectional coupling, which is configured to command the operational connection or the disconnection between the rotor and the shaft.
Dependencies are inferred from the claim text.