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US 7,351,053 B2Granted
Drive unit
AssigneeBosch Rexroth AG
InventorJoerg Dantlgraber
Life of this patent
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Abstract
A drive unit, in particular for a closing unit, an injection unit, or an ejector of an injection molding machine, may be used where a high axial force is applied through a hydraulic power converter. A cylinder of the power converter may be fixed relative to a frame of the injection molding machine through the intermediary of a holding device which is functionally separate from guidance of the cylinder on the frame of the injection molding machine.
Claims12
A drive unit of an injection molding machine, comprising:
- a hydraulic power converter with two piston units movable relative to each other and having different effective surfaces which delimit a pressure chamber jointly with an intermediate part axially displaceable through the intermediary of guide means,
- wherein the smaller piston unit is driven, and the intermediate part is adapted to be fixed relative to a stationary frame through the intermediary of a holding means in order to apply an axial force,
- wherein the holding means has a clamping member that is capable of being displaced together with the intermediate part and that is frictionally lockable with at least one supporting member which is supported on the frame,
- wherein the supporting member and the clamping member via which the intermediate part is lockable, are lockable without the guide means.
1 more element
Dependencies are inferred from the claim text.