US 12,241,486 B2
Hydraulic transmission unit, particularly for deep-sea use
Markus Kubacki, Wuerzburg (DE); Alexandre Orth, Hettstadt (DE); and Gottfried Hendrix, Gemuenden (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 18/260,449
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Dec. 23, 2021, PCT No. PCT/EP2021/087456
§ 371(c)(1), (2) Date Jul. 6, 2023,
PCT Pub. No. WO2022/148668, PCT Pub. Date Jul. 14, 2022.
Claims priority of application No. 10 2021 200 100.9 (DE), filed on Jan. 8, 2021.
Prior Publication US 2024/0052944 A1, Feb. 15, 2024
Int. Cl. F15B 15/06 (2006.01); F15B 15/18 (2006.01); F16K 31/163 (2006.01); F16K 31/54 (2006.01)
CPC F15B 15/065 (2013.01) [F15B 15/18 (2013.01); F16K 31/163 (2013.01); F16K 31/1635 (2013.01); F16K 31/54 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A transmission unit comprising:
a housing;
a rack and pinion transmission arranged in the housing and including at least one gear rack;
a hydraulic drive system arranged in the housing, the hydraulic drive system comprising:
at least one displacer unit configured to increase energy of a pressurizable working fluid of the hydraulic drive system; and
at least one chamber in which a piston, which is operatively connected to a gear rack of the rack and pinion transmission, is moved using the working fluid in order to effect a linear movement of the gear rack; and
a rotatable mechanical actuator operatively connected to the pinion of the rack and pinion transmission and at least a portion of which is arranged outside the housing,
a mechanical interface arranged at least partially outside the housing, the mechanical interface operably connected to the at least one displacer unit and configured to transfer mechanical work performed externally to the housing to the at least one displacer unit so as to increase the energy of the working fluid of the hydraulic drive system,
wherein the mechanical interface comprises at least one connector for a control module that includes an electric motor configured to rotate the at least one connector to perform the mechanical work performed externally to the housing, and
wherein the housing is configured to form a fluid-tight encapsulation of the at least one gear rack, the at least one displacer unit, and the at least one chamber of the hydraulic drive system.