Hydrostatic axial piston motor of bent-axis construction

US10590908B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Alexander Bidell · Schwäbisch Gmünd, DE
• Marcus Herrmann · Neuffen, DE
• Thomas Abenstein · Panketal, DE
• Walter Jauernig · Sehnde, DE

Key dates

• Filing date: Nov 20, 2017
• Grant date: Mar 17, 2020
• Expiry date: Sep 15, 2038

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H61/423
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A variable-displacement hydrostatic axial piston motor of bent-axis construction includes a drive shaft, a cylinder drum that pivots in a pivoting plane, and a one-piece port plate nearly symmetrical with a central plane and with two working ports. The motor further includes an adjusting device with an adjusting piston arranged in the port plate, a control valve arranged on the port plate and with a control valve piston, a feedback spring arranged in the port plate and clamped between the adjusting piston and the control valve piston, a counterbalance valve with a counterbalance spool, and two secondary pressure-limiting valves inserted as cartridge-type inserts into the port plate. The counterbalance spool is accommodated in a valve bore in the port plate. The two working ports are situated on the port plate opposite to the first side. The two secondary pressure-limiting valves are arranged on the same side as the port surfaces.