Friction roller planetary gearing and speed-changing and differential gearing

• Main Authors: PETERSEN RAINER, MOECKEL JOERG, LUTZ ANDREAS, HANKE STEFAN
• Format: Patent
• Language: English
• Published: 14.01.2015
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

The invention relates to a friction roller planetary gearing, comprising a housing (128), a sun shaft (102) having a first and a second sun (104, 106) arranged on the sun shaft, which are each designed as friction rollers and are axially movable with respect to each other and of which at least one (104) is connected to the sun shaft (102) in a rotationally fixed manner, a planet carrier (112), on which a plurality of stepped planets (108), which are designed as friction rollers and which each have a pair of contact surfaces of a smaller diameter and a pair of contact surfaces of a larger diameter, are rotatably supported, and a first ring (124), which is connected to the housing (128) in a rotationally fixed manner and which is designed as a friction ring. The planets (108) each roll on the suns (104, 106) by means of the one pair of contact surfaces of the planets and roll on the first ring (124) by means of at least one contact surface of the other pair of contact surfaces of the planets, and the contact pressure between the suns (104, 106) and the associated contact surfaces of the planets (108) can be controlled by a first torque-dependent axial displacement device by means of torque-dependent axial displacement of at least one of the suns (106). The invention is characterized in that a second ring (126) designed as a friction ring is provided, which is arranged so as to be axially movable relative to the first ring (124) such that the planets (108) roll on both rings (124, 126) by means of the associated pair of contact surfaces of the planets, the contact pressure between the rings (124, 126) and the associated contact surfaces of the planets (108) being controllable by a second torque-dependent axial displacement device by means of torque-dependent axial displacement of at least one of the rings (126).