US 12,169,006 B2
Radial piston machine with brake
Frank O'Hara, Fife (GB)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Nov. 23, 2021, as Appl. No. 17/533,448.
Claims priority of application No. 20210554 (EP), filed on Nov. 30, 2020.
Prior Publication US 2022/0170460 A1, Jun. 2, 2022
Int. Cl. F04C 15/00 (2006.01); F04C 9/00 (2006.01); F16D 55/36 (2006.01); F16D 55/40 (2006.01); F16D 59/02 (2006.01)
CPC F16D 55/36 (2013.01) [F04C 9/002 (2013.01); F04C 15/0084 (2013.01); F16D 55/40 (2013.01); F16D 59/02 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A radial piston machine, comprising:
a housing;
a rotor within the housing, wherein the rotor is rotatable about an axis;
a shaft coupled to the rotor and configured to transmit torque;
a distributor which surrounds the shaft and cannot rotate with the rotor and that contacts the rotor in an axial direction, the distributor configured to communicate fluid to and from the rotor;
a plurality of brake discs comprising first brake discs and second brake discs arranged side-by-side along the axis, wherein the first brake discs are coupled to the housing and configured to transmit torque, and the second brake discs are coupled to the shaft and configured to transmit torque; and
an actuator configured to releasably exert a brake force in the axial direction on the brake discs,
wherein the distributor is located axially between the rotor and the actuator, and the brake discs are located axially between the distributor and the actuator such that, when the brake force is exerted, the distributor axially supports at least one of the plurality of brake discs such that the brake force acts on the distributor in the axial direction, and
wherein the at least one of the plurality of brake discs is configured such that, when the brake force is exerted, the at least one of the plurality of brake discs directly contacts the distributor,
wherein the actuator is hydraulically operable by a pressure fluid and configured such that the actuator does not exert the brake force on the plurality of brake discs when a pressure of the pressure fluid is greater than a predetermined first pressure and the actuator exerts the brake force when the pressure is less than the first pressure, and
wherein the housing defines a cavity in which the pressure fluid acts on the actuator, and a seal is arranged at an axial end of the plurality of brake discs opposite the distributor so as to isolate at least an end surface of the distributor from the pressure fluid in the cavity.