Linear motor and process for manufacturing the same, linear compressor, and stirling engine
OwnerKazuhiko Uedainventor
Life of this patent
Estimating the term…
Abstract
A linear motor device includes an inner yoke, an outer yoke, a coil-wound body and a movable magnet portion, first and second clamp rings for clamping the outer yoke, and a spacer for coupling the first and second clamp rings at a given spacing. The movable magnet portion drives a piston reciprocating in a cylinder. The first clamping member is provided with a support portion for supporting a spring for pushing the piston. The second clamping member is fixed directly or indirectly to the cylinder. A linear compressor and a Stirling engine include the above-described linear motor device.
Claims8
A linear motor device, comprising:
- an inner yoke;
- an outer yoke located outside said inner yoke;
- a coil-wound body and a movable magnet portion for driving a piston reciprocating in a cylinder, both located between said inner yoke and said outer yoke;
- first and second clamping members for clamping said outer yoke;
- and
- a spacer for coupling said first and second clamping members at a given spacing,
- said first clamping member being provided with a support portion supporting a spring for pushing said piston, and
- said second clamping member being fixed directly or indirectly to said cylinder.
A method for manufacturing a linear motor device, comprising the steps of:
- fixing a first outer yoke block and a second outer yoke block to a first clamping member and a second clamping member, respectively, by ultrasonic welding;
- while said first and second outer yoke blocks are fixed to said first and second clamping members, coupling said first and second clamping members together by ultrasonic welding with a spacer interposed therebetween,;
- fixing said first and second outer yoke blocks to each other.
A linear compressor, comprising:
- a cylinder provided in a casing;
- a piston reciprocating in said cylinder;
- a linear motor device provided in an outer periphery of said cylinder to drive said piston;
- and
- a spring for pushing said piston,
- said linear motor device having an inner yoke, an outer yoke located outside said inner yoke, a coil-wound body and a movable magnet portion located between said inner yoke and said outer yoke, first and second clamping members for clamping said outer yoke, a spacer for coupling said first and second clamping members at a given spacing, and a support portion for supporting said spring,
- said first clamping member being provided with said support portion, and
- said second clamping member being mounted to said cylinder.
A Stirling engine, comprising:
- a cylinder provided in a casing;
- a piston and a displacer reciprocating in said cylinder;
- a linear motor device provided in an outer periphery of said cylinder for allowing said piston to reciprocate in said cylinder;
- and
- a spring for pushing the displacer,
- said linear motor device having an inner yoke, an outer yoke located outside said inner yoke, a coil-wound body and a movable magnet portion located between said inner yoke and said outer yoke, first and second clamping members, for clamping said outer yoke, a spacer for coupling said first and second clamping members at a given spacing, and a support portion for supporting said spring,
- said first clamping member being provided with said support portion, and
- said second clamping member being mounted to said cylinder.
Dependencies are inferred from the claim text.