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AssigneeBaruffaldi S.p.A.
InventorsPiercarlo Boffelli, Claudio Bellotti, Erminio Depoli, Fabio Natale
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Device for controlling the means (1) for recirculating a cooling fluid in engines (11a) in particular for vehicles and like, comprising a shaft (2) actuating the impeller, means (3,3b) for generating the movement of said shaft and means for transmitting the movement from the said generating means (3,3b) to the said shaft (2) of the impeller (1), in which said movement transmission means comprise a double-action coupling (30,40) comprising: magnetic means (31) integral with a rotor (30;130;230) and able to cooperate with corresponding magnetizable means (41;141;241) of a support (40;140;240) rotationally connected to the shaft (2) of the recirculating means and movable in an axial direction with respect thereto, so as to determine a first speed of rotation of the recirculating means (1), and electromagnetic means (22,22a) able to co-operate with a ring (41a;141a;241a) integral with said support (40;140;240) so as to determine a second and different speed of rotation of the pump impeller (1).
) Device for controlling the means (1) for recirculating a cooling fluid in engines (11a) in particular for vehicles and like, comprising a shaft (2) actuating the impeller, means (3,3b) for generating the movement of said shaft and means for transmitting the movement from the said generating means (3,3b) to the said shaft (2) of the impeller (1), characterized in that said movement transmission means comprise a double-action coupling (30,40) comprising:
2) Device according to claim 1, characterized in that said recirculating means consist of a pump comprising an impeller (1) and a fixed pump body (11) to which the middle race (20a) of a stepped bearing (20) is constrained.
5) Device according to claim 1, characterized in that said movement generating means consist of a pulley (3) actuated by an associated drive belt (3b).
8) Device according to claim 1, characterized in that said magnetic means are permanent magnets (31).
9) Device according to claim 1, characterized in that said electromagnetic means (22;22a) are integral with the fixed middle race (20a) of the stepped bearing (20).
10) Device according to claim 1, characterized in that said electromagnetic means consist of an electromagnet (22;22a) which can be remotely activated.
11) Device according to claim 1, characterized in that said magnetic means (31) are arranged in a radial position contained within the radial dimension of the flux lines of the magnetic field of said electromagnetic means (22).
12) Device according to claim 1, characterized in that said magnetic means (31) are arranged in a radial position outside the radial dimension of the flux lines of the magnetic field of said electromagnetic means (22).
17) Device according to claim 1, characterized in that said support shaft (2) also has, constrained to it, a fan (300) for cooling the cooling fluid, comprising a disk (301) supporting the blades (302).
27) Pump for recirculating a fluid for cooling engines in particular for vehicles and the like, comprising an impeller (1), the actuating shaft (2) of which is connected to means (3,3b) for generating the movement of said shaft by means of associated movement transmission means, characterized in that said movement transmission means comprise a double-action coupling comprising:
Dependencies are inferred from the claim text.