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US 2001/0029796 A1Published application
Rack and pinion type swing actuator
AssigneeSMC Corporation
InventorMitsunori Magaribuchi
Life of this patent
Estimating the term…
Abstract
A rack and a pinion respectively have stoppers constituted by a flat surface in both sides of tooth portions thereof. The stopper of the pinion is brought into contact with the stopper of the rack at both oscillating stroke ends of the rack, whereby a backlash is absorbed.
Claims5
A rack and pinion type rotary actuator comprising:
- a cylinder hole provided in a casing;
- end blocks closing both ends of said cylinder hole;
- one rack having pistons at both ends and sliding within said cylinder hole in accordance with an operation of a fluid pressure;
- a pinion rotating in a state of being engaged with said rack;
- pressure chambers respectively formed between the pistons at both ends of said rack and the end blocks;
- and ports for supplying a pressure fluid to said respective pressure chambers,
- wherein at least one of said rack and the pinion has stoppers in both sides of a tooth portion, the rack and the pinion has a relation that the rack and the pinion are engaged with each other by said stopper at both oscillating stroke ends of said rack, and said rack and each of the end blocks have a relation that the rack and each of the end blocks are not brought into contact with each other at the stroke end of said rack.
4 more elements
Dependencies are inferred from the claim text.