| 摘要 |
<p>The invention relates to a steering booster for vehicles, comprising a drive unit arranged coaxially in relation to a thrust rod arrangement (2, 3), said thrust rod arrangement (2, 3) containing a toothed rack (2) in a partial section which is connected to another partial section, said latter section being embodied as a ball bearing spindle (3). The electronically commutated electric motor (7, 8, 9, 10, 11, 12) arranged coaxially in relation to the ball bearing spindle (3) drives a ball nut (21) with the rotor (9) thereof, said nut forming a ball screw (20) together with the ball bearing spindle (3), enabling the thrust rod arrangement to move in a translatory manner. Jamming of the ball screw (20), which sometimes occurs due to bending of the trust rod arrangement (2, 3) are avoided by connecting the ball nut (21) to the rotor (9) by means of an elastic retaining element (22, 25, 26). As a result, it is possible to construct a smaller, cheaper drive unit thereby enlarging the operating range.</p> |
