Linear actuator of small size
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsMasahiro Ohta, Toru Sukigara, Kazuhiro Kagawa
Life of this patent
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Abstract
A linear actuator includes a supporting unit with a stopper, a linear output unit, a movable unit, a magnetic flux generating unit and a control unit. The movable unit is connected to a stopper of the outer pipe at one end of the outer movable unit and to the linear output unit at the other end. The magnetic flux generating unit generates first magnetic fluxes. The movable unit has elasticity, and expands or contracts based on action of the first magnetic fluxes and the elasticity. The linear output unit linearly moves in response to the expansion or contraction of the movable unit.
Claims19
A linear actuator comprising:
- a linear output unit;
- a supporting unit with a stopper, said supporting unit having a first pipe, said stopper being attached to one end of said first pipe, and a part of said linear output unit being slidably accommodated in said first pipe;
- a movable unit having elasticity connected to said stopper at one end of said movable unit and to said linear output unit at the other end thereof;
- and
- a magnetic flux generating unit for generating first magnetic fluxes;
- wherein said movable unit generates second magnetic fluxes in a direction orthogonal to said first magnetic fluxes, said movable unit expands or contracts based on interaction between said first magnetic fluxes and said second magnetic fluxes, and said linear output unit moves linearly in response to expansion or contraction of said movable unit.
A linear actuator comprising:
- a magnetic flux generating section which is fixed and generates first magnetic fluxes in a first direction, said magnetic flux generating section further comprising a first pipe and a stopper, said stopper being attached to one end of said first pipe;
- and
- a movable unit which includes a spring coil, is attached to said magnetic flux generating section, accommodates at least a part of said magnetic flux generating section and generates second magnetic fluxes in a second direction orthogonal to said first direction,
- wherein said movable unit linearly expands or contracts such that interaction between said first magnetic fluxes and said second magnetic fluxes balances with said elasticity, and a part of said movable unit is provided to be slidable with said magnetic flux generating section.
A linear actuator comprising:
- an operation body arranged within and extending substantially along an entire length of a cylinder, said operation body expanding or contracting in response to magnetic forces;
- a magnetic flux generating unit which generates magnetic fluxes in a direction orthogonal to a direction of expansion or contraction of said operation body;
- and
- a linear output unit which outputs contraction force at both ends of said operation body and moves relatively to in the direction of the expansion or contraction of said operation body;
- wherein said operation body has a spring constant and expands or contracts to a length corresponding to the magnetic fluxes generated by said magnetic flux generating unit.
Dependencies are inferred from the claim text.