| 摘要 |
A linear drive unit (52), comprising (a) a housing (54) in which a driving motor (58) is accommodated; (b) a driven rod (64) adapted to be driven in linear manner and having a hollow portion (104) which partly extends over the housing (54) and is supported on the outer circumference of the housing (54) in axially slidable manner; (c) a conversion drive (62) which is in driving connection with the motor (58) and the driven rod (64) and converts rotational movement into linear movement of the driven rod (64); (d) a drive body (92) which belongs to the conversion drive (62) and is adapted to be driven by the motor in rotating manner and which is provided on its outer circumference with a circumferential groove profile (160) and with teeth (162); (e) a pluralityy of axially extending revolving members (166) which are rotatable about their own axes and which each have a circumferential groove profile (172) as well as teeth (174); (f) engagement of the groove profiles (172) of the revolving members (166) at a radially inner location with the groove profile (160) of the drive body (92) and at a radially outer location with a circumferential groove profile (164) on the inner circumference of the hollow portion (104) of the driven rod (64), as well as engagement of the teeth (174) of the revolving members (166) with the teeth (162) of the drive body (92); (g) a design of the groove profiles (150, 172, 164) of the drive body (92), the revolving members (166) and the hollow portion (104) of the driven rod in such a manner that, during rotation of these parts, there is no axial relative movement between the drive body (92) and the revolving members (166) and the driven rod (64) carries out an axial relative movement with respect to the revolving members (166).
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