Back to results
US 2019/0084612 A1Published application
Belt Drive and Steering System
AssigneeRobert Bosch Automotive Steering GmbH
InventorsArtur Kirschenmann, Gerd Speidel
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeRobert Bosch Automotive Steering GmbH
InventorsArtur Kirschenmann, Gerd Speidel
Estimating the term…
A belt drive has a drive gear, an output gear, a tensioning gear, and at least two belts. Each belt partly loops the drive gear and the output gear, and a strand of each belt partly loops the tensioning gear. A strand of a first belt loops the tensioning gear in one circumferential direction. This strand extends from the drive gear to the output gear. A strand of a second belt loops the tensioning gear in the other circumferential direction. This strand extends from the drive gear to the output gear. This belt drive achieves a large looping angle for the drive gear and the output gear, and correspondingly, a large transmission power. Additionally, the effect of the other belt enables a belt self-tensioning function which is independent of the rotational direction. Guiding the belts in this manner enables omission of an additional mounting of the tensioning gear.
A belt drive (7) with a drive gear (8), a driven gear (10) and a tensioning gear (11), characterized by at least two belts (12a, 12b) which in each case partially wrap around the drive gear (8), the driven gear (10) and, by one strand in each case, the tensioning gear (11), wherein a first belt (12a), by the associated strand which extends from the drive gear (8) to the driven gear (10), wraps around the tensioning gear (11) in one of the circumferential directions, and a second belt (12b), by the associated strand which extends from the drive gear (8) to the driven gear (10), wraps around the tensioning gear (11) in the other circumferential direction.
The belt drive (7) as claimed in one of the preceding claims, characterized in that at least two first belts (12a) and one or more second belts (12b) are provided, wherein two first belts (12a) encompass the second belt(s) (12b) with regard to the direction of the longitudinal direction (15) of the tensioning gear (11).
The belt drive (7) as claimed in one of the preceding claims, characterized in that the contact areas, which on the one hand are formed in each case between the tensioning gear (11), the drive gear (8) and/or the driven gear (10) and also the first belt(s) (12a) and on the other hand are formed in each case between the tensioning gear (11), the drive gear (8) and/or the driven gear (11) and also the second belt(s) (12b), are of equal size.
The belt drive (7) as claimed in one of the preceding claims, characterized in that the tensioning gear (11) is supported exclusively by the belts (12a, 12b).
The belt drive (7) as claimed in one of the preceding claims, characterized by a drive motor, coupled to the drive gear (8), which is provided for a drive in both rotational directions.
A steering system with a steering rod (1) which is provided with one or more connecting elements which are intended for a connection to a wheel steering lever of a steerable wheel, and with a steering drive (5) which acts directly or indirectly upon the steering rod (1) and has a drive motor and a belt drive (7) according to the invention.
Dependencies are inferred from the claim text.