Back to results
US 6,746,218 B2Granted
Compact electrohydraulic motor pump unit
AssigneeBosch Rexroth AG
InventorRoland Heller
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeBosch Rexroth AG
InventorRoland Heller
Estimating the term…
A compact electrohydraulic motor pump unit comprising a housing which forms a reservoir for a pressurized fluid and contains an electric motor, and which comprises a first housing sealing section, a second housing sealing section and a tubular housing mid-section therebetween. Disposed between the second housing sealing section and the electric motor is a support plate for a pump which can be driven by the electric motor via a motor shaft and by which pressurized fluid can be conveyed on a pressurized flow path to a delivery connection. In such a conventional type motor pump unit, a circumferential seal, which is intended to seal off the interior of the housing, is located both between the support plate and the housing mid-section and between the support plate and the second housing sealing section. In order to reduce the number of sealing points between the interior and the exterior of the housing, the delivery connection is located externally on the second housing sealing section, and the second housing sealing section and the tubular housing mid-section, sealing off the interior of the housing from the outside, rest against one another peripherally and the support plate is located entirely within the housing.
A compact electrohydraulic motor pump unit comprising a housing (10) which forms a reservoir for a pressurized fluid and contains an electric motor (11), and which comprises a first housing sealing section (12), a second housing sealing section (13) and a tubular housing mid-section (14) therebetween, with a support plate (35, 75, 80) disposed between the second housing sealing section (13) and the electric motor (11) in the housing (10) and with a pump (40, 65, 85) located within the housing (10) and drivable by the electric motor (11) via a motor shaft (23), which pump is fixed on the support plate (35, 75, 80) and can convey pressurized fluid in a pressurized flow path to a delivery connection (88), wherein the delivery connection (88) is located externally on the second housing sealing section (13), the second housing sealing section (13) and the tubular housing mid-section (14), sealing an interior of the housing (10) from the outside, lie against one another peripherally and the support plate (35, 75, 80) is located entirely in the interior of the housing (10), and wherein a tube (60, 68, 81) lies in the pressurized flow path and is connected axially plugged-in with the second housing sealing section (13) at one end and connected axially plugged-in with a counterpart (35, 66, 75, 80) at the other end.
The compact electrohydraulic motor pump unit as claimed in 5, wherein the spring element (64) is supported via a shim (63) on the tube (60, 68, 81).
Compact electrohydraulic motor pump unit comprising a housing (10) which forms a reservoir for a pressurized fluid and contains an electric motor (11), and which comprises a first housing sealing section (12), a second housing sealing section (13) and a tubular housing mid-section (14) therebetween, with a pump (85) located within the housing (10) and drivable by the electric motor (11) via a motor shaft (23), which pump is fixed on the second housing sealing section (13) and can convey pressurized fluid in a pressurized flow path to a delivery connection (88) externally on the second housing sealing section (13), wherein an axial insertion bore (82) into which a closure screw (89) is driven, is located in the second housing sealing section (13), the axial insertion bore being a section of a pressurized fluid passage.
Dependencies are inferred from the claim text.