# US 12,000,390 B2 · Electromechanically drivable brake pressure generator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,000,390 B2 - Document ID: US12000390B2 - Status: Granted - Kind: B2 - Application number: 17/620,416 - Filed: 2020-06-12 - Published: 2022-11-03 - Granted: 2024-06-04 - Earliest claimed: 2019-08-19 - Assignees: Robert Bosch GmbH - Applicants: Robert Bosch GmbH - Inventors: Claus Oehler; Martin Uhlig - Web page: https://patentgrep.com/patent/US12000390B2 ## CPC - F04B 9/02: the means being mechanical - F04B 17/03: driven by electric motors - F16H 57/082: {Planet carriers} - B60T 13/168: {Arrangements for pressure supply} - B60T 13/745: {acting on a hydraulic system, e.g. a master cylinder} - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) - F16H: GEARING - B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES ## Abstract An electromechanically drivable brake pressure generator for a hydraulic braking system of a vehicle. The electromechanically drivable brake pressure generator includes an electric motor for generating a input speed, a planetary gear set that is driven by the electric motor on the input side to decrease a gear ratio of the input speed, and a hydraulic module that is connected to the planetary gear set on the output side to generate a brake pressure. The planetary gear set includes stepped planets that are connected to a sun wheel of the planetary gear set on the input side and to an output component of the planetary gear set on the output side. ## Claims ### Claim 1 An electromechanically drivable brake pressure generator for a hydraulic braking system of a vehicle, comprising: an electric motor configured to generate an input speed, a planetary gear set driven by the electric motor on an input side of the planetary gear set the planetary gear set having a gear ratio to decrease the input speed; and a hydraulic module connected to the planetary gear set on an output side of the planetary gear set to generate a brake pressure; wherein the planetary gear set includes stepped planets that are connected to a sun wheel of the planetary gear set on the input side and to an output component of the planetary gear set on the output side, wherein the stepped planets are mounted in the electromechanically drivable brake pressure generator via planet axles that are fixedly connected to the electric motor or to a housing part of the electromechanically drivable brake pressure generator. ### Claim 2 (depends on 1) The electromechanically drivable brake pressure generator as recited in claim 1, wherein the output component is a planet carrier that accommodates the stepped planets. ### Claim 3 (depends on 2) The electromechanically drivable brake pressure generator as recited in claim 2, wherein the stepped planets have a bearing area via which they are mounted in bores of the planet carrier. ### Claim 4 (depends on 1) The electromechanically drivable brake pressure generator as recited in claim 1, wherein the output component is an annulus gear of the planetary gear set. ### Claim 5 (depends on 4) The electromechanically drivable brake pressure generator as recited in claim 4, wherein the stepped planets and/or a planet carrier and/or the annulus gear are formed from a plastic injection-molded material. ### Claim 6 (depends on 1) The electromechanically drivable brake pressure generator as recited in claim 1, wherein the output component is mounted via a bearing that is situated between a housing part and the output component. ### Claim 7 (depends on 1) The electromechanically drivable brake pressure generator as recited in claim 1, wherein the stepped planets and/or the sun wheel are formed from a sintered metal material. ### Claim 8 An electromechanically drivable brake pressure generator for a hydraulic braking system of a vehicle, comprising: an electric motor configured to generate an input speed, a planetary gear set driven by the electric motor on an input side of the planetary gear set the planetary gear set having a gear ratio to decrease the input speed; and a hydraulic module connected to the planetary gear set on an output side of the planetary gear set to generate a brake pressure; wherein the planetary gear set includes stepped planets that are connected to a sun wheel of the planetary gear set on the input side and to an output component of the planetary gear set on the output side, wherein the output component is a spur wheel. ### Claim 9 A vehicle, comprising: an electromechanically drivable brake pressure generator for a hydraulic braking system of the vehicle, including: an electric motor configured to generate an input speed, a planetary gear set driven by the electric motor on an input side of the planetary gear set the planetary gear set having a gear ratio to decrease of the input speed; and a hydraulic module connected to the planetary gear set on an output side of the planetary gear set to generate a brake pressure; wherein the planetary gear set includes stepped planets that are connected to a sun wheel of the planetary gear set on the input side and to an output component of the planetary gear set on the output side, wherein the stepped planets are mounted in the electromechanically drivable brake pressure generator via planet axles that are fixedly connected to the electric motor or to a housing part of the electromechanically drivable brake pressure generator.