초록 ▼

A fan assembly (10) includes first and second housing sections (70, 72) which, when mated by a first set of fasteners, define a plurality of circumferentially spaced openings (162) that lead to an internal housing chamber (82). The fan assembly (10) also includes a plurality of blade units (140), ea

A fan assembly (10) includes first and second housing sections (70, 72) which, when mated by a first set of fasteners, define a plurality of circumferentially spaced openings (162) that lead to an internal housing chamber (82). The fan assembly (10) also includes a plurality of blade units (140), each of which includes an integral support stem (142) having a journal portion (148) rotatably mounted within a respective one of the openings (162), an enlarged flange portion (144) and a radial post portion (138) rotatably supported by a hub member (106) within the internal chamber (82). Each blade unit (140) preferably has a thrust bearing (156), bushing sleeve (158) and fan blade (152) integrated with the support stem (142), with the fan blade (152) being preferably molded to the support stem (142) following positioning of the thrust bearing (156) and bushing sleeve (158) to form an integral component. The fan assembly (10) further includes an actuator member (112) that is movably supported within the internal housing chamber (82) and which is adapted to engage a pin (166) of the support stem (142) at a position offset from a rotational axis thereof to adjust the pitch of the fan blades (152). The fan assembly (10) is adapted to be attached to a drive device (12) with a portion (42) of the drive device (12) covering a first set of fasteners (78) such that the first and second housing sections (70, 72) can only be disassembled following detachment from the drive device (12). A sensing arrangement (58, 180) is also preferably provided to generate signals indicative of at least one of the pitch and rotating speed of the fan blades (152).

대표청구항 ▼

[ We claim:] [1.] In an assembly including a housing drivingly connected to a drive unit for rotation about a first axis and an actuator member mounted within the housing for concurrent rotation with the housing about the first axis and axial movement relative to the housing along the first axis thr

[ We claim:] [1.] In an assembly including a housing drivingly connected to a drive unit for rotation about a first axis and an actuator member mounted within the housing for concurrent rotation with the housing about the first axis and axial movement relative to the housing along the first axis through indefinitely variable positions in order to selectively control an operating parameter of the assembly, a sensing system comprising, in combination: a first sensor element attached to the actuator member so as to both rotate in unison with the actuator member about the first axis and to shift in unison with the actuator member along the first axis; and a second sensor element fixed to the drive unit, with the second sensor element being adapted to sense both a rotational condition of the first sensor element about the first axis and a degree of shifting of the first sensor element in order to develop signals indicative of a rotating speed and axial position of the actuator member. [2.] The sensing system of claim 1, further comprising, in combination: a plurality of working members connected to the housing for concurrent rotation with the housing about the first axis and rotation relative to the housing about a second axis arranged substantially perpendicular to the first axis to adjust a relative angular position between the housing and the working members, with the actuator member being interengaged with each of the working members such that axial shifting of the actuator member relative to the housing causes the working members to rotate about the second axis, such that the developed signals are also indicative of a rotating speed of the working members and the relative angular position between the housing and the working members.