A ball screw provided in a steering system has a groove between the inner peripheral surface of a cylindrical ball nut 13 through which a steered shaft extends and the outer peripheral surface of the steered shaft, and a plurality of balls 16 are accommodated in the groove. The balls 16 rolling and flowing in the groove are returned from downstream to upstream via deflectors 18, 19 and a return passage member 20 which are disposed in the ball nut 13. The return passage member 20 has a first connection portion 22 curved so as to connect one end of a linear portion 21 of the return passage member 20 to the first deflector 18, and a second connection portion 23 curved so as to connect the other end of the linear portion 21 to the second deflector 19. Each of the connection portions 22, 23 has an opening that opens in a longitudinal end face of the return passage member 20 and an opening that opens in the outer periphery of the return passage member 20 toward the centerline of the ball nut 13.
BALL SCREW AND STEERING SYSTEM
KUGELGEWINDETRIEB UND LENKSYSTEM
VIS À BILLES ET SYSTÈME DE DIRECTION
09.08.2017
Patent
Elektronische Ressource
Englisch
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
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