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US 9,556,866 B2Granted
Radial piston machine and piston for a radial piston machine of this type
AssigneeRobert Bosch GmbH
InventorDavid Breuer
Life of this patent
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Abstract
A radial piston machine includes a piston having a base which is provided with a roller. The roller is held secure by a bearing shell that is inserted in the piston base.
Claims14
A radial piston machine comprising:
- a housing;
- a rotatably mounted cylinder star;
- a stroke ring which is fixed with respect to the housing;
- and
- a multiplicity of pistons supported on the stroke ring and guided in the rotatably mounted cylinder star,
- wherein each piston of the multiplicity of pistons has a roller which is rotatably mounted on a piston foot via a bearing shell,
- wherein a captive retention mechanism for the roller is formed by the bearing shell,
- wherein a receptacle on the piston foot extends around the bearing shell over no more than 180°, and
- wherein the bearing shell extends around the roller over a circumferential angle of greater than 180°, such that a portion of the bearing shell is unsupported by the piston foot.
6 more elements
A radial piston machine, comprising:
- a housing;
- a rotatably mounted cylinder star;
- a stroke ring which is fixed with respect to the housing;
- and
- a multiplicity of pistons supported on the stroke ring and guided in the rotatably mounted cylinder star, wherein:
- each piston of the multiplicity of pistons has a roller which is rotatably mounted on a piston foot via a bearing shell;
- a captive retention mechanism for the roller is formed substantially by the bearing shell;
- wherein the bearing shell is connected to the piston foot by adhesive bonding and riveting;
- wherein the bearing shell extends around the roller over a circumferential angle of greater than 180, such that a portion of the bearing shell is unsupported by the piston foot.
6 more elements
A piston for a radial piston machine, comprising:
- a piston foot defining a receptacle;
- a bearing shell partially received by the receptacle;
- a roller mounted on the bearing shell;
- and
- a captive retention mechanism for the roller formed by the bearing shell,
- wherein the receptacle extends around the bearing shell over no more than 180°, and
- wherein the bearing shell extends around the roller over a circumferential angle of greater than 180°, such that a portion of the bearing shell is unsupported by the piston foot.
4 more elements
Dependencies are inferred from the claim text.