Thrust Plate Retaining Device for Radial Piston Pumps
AssigneeRobert Bosch GmbH
InventorUwe Kuhn
Life of this patent
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Abstract
A radial piston pump for generating high-fuel pressure in fuel injection systems of internal combustion engines, in particular in a common rail injection system, having a drive shaft which is supported in a pump housing and has an eccentrically embodied shaft portion on which preferably a plurality of pistons, disposed radially in a respective element bore are supported relative to the drive shaft. The pistons move back and forth in the respective element bore by rotation of the drive shaft. An axial bearing disk with a plurality of lugs which are disposed on the circumference and engage corresponding grooves in the pump housing is mounted in the pump housing with the aid of a retaining device.
Claims19
A radial piston pump for generating high-fuel pressure in fuel injection systems of internal combustion engines including a common rail injection system, comprising a drive shaft (2) which is supported in a pump housing (7, 8) and has an eccentrically embodied shaft portion (3), a plurality of pistons (4) are disposed radially in a respective element bore (5) and supported relative to the drive shaft (2), said pistons are moved back and forth in the respective element bore (5) by rotation of the drive shaft (2), an axial bearing disk (13) or a stop ring (41) with a plurality of radially extending lugs (18, 19) which are disposed on a circumference of said axial bearing disk (13) or said stop ring (41) which engage corresponding recesses in the pump housing (7) is mounted in the pump housing (7, 8) with the aid of a separate retaining device (15, 24, 30).
A radial piston pump for generating high-fuel pressure in fuel injection systems of internal combustion engines including a common rail injection system, comprising a drive shaft (2) which is supported in a pump housing (7, 8) and has an eccentrically embodied shaft portion (3), a plurality of pistons (4) are disposed radially in a respective element bore (5) and supported relative to the drive shaft (2), said pistons are moved back and forth in the respective element bore (5) by rotation of the drive shaft (2), an axial bearing disk (13) or a stop ring (41) with a plurality of lugs (18, 19) which are disposed on the circumference and engage corresponding recesses in the pump housing (7) is mounted in the pump housing (7, 8) with the aid of a retaining device (15, 24, 30), and an annular groove (21) is recessed in the pump housing (7) and serves to receive a retaining ring (15), said retaining device forms the retaining ring on which axially directed clamp-like protrusions (16, 17) are formed and which fit around the lugs (18, 19) on the axial bearing disk (13) or stop ring (41).
A radial piston pump for generating high-fuel pressure in fuel injection system of internal combustion engines including a common rail injection system, comprising a drive shaft (2) which is supported in a pump housing (7, 8) and has an eccentrically embodied shaft portion (3), a plurality of pistons (4) are disposed radially in a respective element bore (5) and supported relative to the drive shaft (2), said pistons are moved back and forth in the respective element bore (5) by rotation of the drive shaft (2), an axial bearing disk (13) or a stop ring (41) with a plurality of lugs (18, 19) which are disposed on the circumference and engage corresponding recesses in the pump housing (7) is mounted in the pump housing (7, 8) with the aid of a separate retaining device (15, 25, 30), and being inserted into corresponding bores (27, 28) in the pump housing (7).
A radial piston pump for generating high-fuel pressure in fuel injection systems of internal combustion engines including a common rail injection system, comprising a drive shaft (2) which is supported in a pump housing (7, 8) and has an eccentrically embodied shaft portion (3), a plurality of pistons (4) are disposed radially in a respective element bore (5) and supported relative to the drive shaft (2), said pistons are moved back and forth in the respective element bore (5) by rotation of the drive shaft (2), an axial bearing disk (13) or a stop ring (41) with a plurality of lugs (18, 19) which are disposed on the circumference and engage corresponding recesses in the pump housing (7) is mounted in the pump housing (7, 8) with the aid of a retaining device (15, 24, 30), and the retaining device is formed by a retaining disk (30), and from a circumference of said retaining disk, a plurality of claws (31-34) are bent, said claws dig into the pump housing (7) when the axial bearing disk (13) is disposed between the retaining disk (30) and the pump housing (7).
Dependencies are inferred from the claim text.